Your growth, year by year, and what if the return is different

I built this part so you can see the whole journey of your money, not just the headline number. The chart shows your balance rising year by year. The table below it is the year-by-year record, with what you put in, what growth added, and what you had at the end of each year. The scenario table shows what happens if the return comes in one point lower or one point higher than you assumed, because it never comes in exactly as assumed, and the difference over thirty years is not small.

Year-by-year schedule

What if the return is different?

How much do I need to retire? The honest way I answer it

When someone asks me how much they need to retire, I do not start with a number. I start with a question back: how much do you spend in a year, and how much of that spending will be covered by income that is not your savings? That is the whole method, and every shortcut that skips it is guessing. Your retirement need is not a multiple of your salary that someone else picked. It is your annual spending, minus the guaranteed income you expect, multiplied by the number of years your savings must cover, with a margin for the things you cannot foresee. I work through that method slowly here, because the number you get at the end is only as honest as the spending figure you put in at the start.

I begin with spending, because spending is the one part of retirement you can measure today. I ask you to take your current annual spending and split it into three piles. The first pile is spending that stops or falls when you retire: commuting, work clothes, payroll taxes on wages you will no longer earn, and retirement saving itself, which is spending in the sense that it leaves your paycheque, but it is not consumption, and it must not be counted as a retirement cost. The second pile is spending that stays: housing, food, utilities, insurance, transport, and the ordinary cost of living your life. The third pile is spending that rises: health care, above all, and help at home as you age, and travel in the early, active years of retirement if that is how you want to spend them. Most people I help find that the second and third piles together land somewhere between 70% and 90% of their pre-retirement spending, but I do not use that range as your answer. I use it as a check on your own arithmetic. If your own figure lands far outside it, I want to know why, because the reason is usually a mortgage that will be paid off, a house move, or a health cost that has been left out.

Next I subtract guaranteed income. In the United States, for most people, that means Social Security, and for some it means a pension, rental income, or part-time work they genuinely intend to do. I treat Social Security as a floor, not as the plan, and I explain why in its own section later on this page. I do not put a Social Security benefit table on this page, because that is a separate calculation with its own rules, and this page is about your savings. What I do here is show you the gap: annual spending in retirement, minus guaranteed annual income, equals the annual income your savings must provide. That gap is the number the 4% rule then translates into a nest egg. If you spend $60,000 a year in retirement and Social Security and a pension cover $30,000 of it, your savings must provide $30,000 a year, and at a 4% withdrawal rate that means a nest egg of $750,000, because $30,000 divided by 0.04 is $750,000. The arithmetic is that simple, and the honesty is in the inputs, not in the division.

I also want you to think in years, not just in totals. A nest egg must last from the day you retire until the day you die, and you do not know that second date. Planning to 90 is the convention I use for most people, and planning to 95 is the convention I use when longevity runs in the family or when a spouse is younger. That is not pessimism. It is the recognition that running out of money at 88 is a worse failure than dying with money left over at 88, and that a plan built for a thirty-year retirement survives a twenty-five-year retirement easily, while the reverse is not true. If you retire at 65 and plan to 90, your savings must fund twenty-five years. If you retire at 60, they must fund thirty. Every year you retire earlier adds a year of spending and removes a year of saving and compounding, which is why early retirement is expensive in a way that surprises people who only count the extra years of freedom.

Finally, I build in a margin, and I say so openly. Your spending estimate will be wrong. Health costs will arrive that you did not budget for. A roof will need replacing, a car will need replacing, a family member will need help. I treat a margin of 10% to 20% on the spending figure as prudent, not as padding, and I would rather you aim for a nest egg that is a little too large than one that is exactly large enough on paper and too small in life. The calculator at the top of this page lets you test that margin directly: raise your monthly contribution until the projected nest egg covers your gap with room to spare, and then look at the scenario table to see whether it still covers the gap if the return comes in one point lower. If it does not, you have found the honest size of your plan, and you have three levers to fix it: save more, retire later, or spend less. Those are the only three levers there are, and I return to them throughout this page.

How the maths works: compounding, contributions, and the formula

I want you to be able to check this calculator with a pencil, because a calculator you cannot check is a calculator you should not trust with your retirement. The maths has two parts: the growth of money you already have, and the growth of money you add every month. Both use compound interest, and both are simple once you see them separately.

The money you already have grows by compound interest. If you have $50,000 and it earns 7% a year, compounded monthly, then after one month it is $50,000 multiplied by 1 plus 0.07 divided by 12, which is about $50,292. After a year it is about $53,614. After ten years it is about $100,484, because the interest itself earns interest, and the balance doubles roughly every ten years at 7%. The formula is:

The money you add every month grows by the future value of a series of payments. Each monthly contribution earns interest from the month it is paid until retirement, so the first contribution earns the most interest and the last earns almost none. The formula for contributions made at the end of each month is:

Two details in my calculator deserve your attention, because they change the answer slightly and honestly. First, I assume contributions are made at the end of each month. Money paid at the start of each month would earn one extra month of interest on every payment, and the result would be very slightly higher. I use the end-of-month convention because it is the conservative one, and because most people are paid and contribute during the month rather than on the first day of it. Second, I use the net return, which is your assumed return minus any fee you type in. A 7% return with a 1% fee is a 6% net return in my maths, for every month, for the whole period. That is a simplification, because real fees are charged in different ways and real returns vary, but it is the simplification that shows you the true cost of fees, and I prefer it to hiding the fee entirely.

I also want to give you the rule of thumb I use when I am doing this arithmetic in my head. At 7% a year, money doubles roughly every ten years. At 5%, it doubles roughly every fourteen years. At 10%, roughly every seven years. That is the rule of 72: divide 72 by the annual return, and you get the approximate doubling time in years. It is not exact, and it does not replace the calculator, but it gives you a feel for the force you are dealing with. A dollar saved at 35 at 7% is worth about eight dollars at 65, because it doubles three times. A dollar saved at 55 is worth about two dollars at 65, because it doubles once. That difference, more than any other single fact, is why this page keeps returning to starting early.

This table is contributions alone, with no starting savings, at a constant 7% a year compounded monthly, contributions at the end of each month. I include it because it answers the question I am asked most often in one glance: what does my monthly amount actually become? Notice that the thirty-year column is not three times the ten-year column. It is about seven times it. That is compounding, and it is why the last ten years of saving do more work than the first ten, and why stopping early is so expensive.

Why starting early matters more than earning more

I have seen this comparison change more minds than any other argument in retirement planning, so I make it carefully and with real numbers. Two savers both earn the same assumed 7% a year. The first saver starts at 30, saves $300 a month, and stops at 65. She puts in $126,000 over thirty-five years, and my calculator gives her about $540,316. The second saver starts at 40, saves $300 a month, and stops at 65. He puts in $90,000 over twenty-five years, and my calculator gives him about $243,022. The first saver contributed $36,000 more. She ends with about $297,294 more. The extra money did not come from her contributions. It came from the ten extra years in which her balance, already grown large, earned returns on returns.

Now I ask the harder question: what would the second saver have to save each month to catch up? The answer, at the same 7% return, is about $667 a month, more than double the first saver’s $300, for the same final balance. And if the second saver waits until 50, the monthly amount needed to reach the same $540,316 by 65 rises to about $1,720 a month. I do not give you those figures to frighten you. I give them to you because they show the true price of waiting, in the currency that matters: the monthly amount you must find, every month, for the rest of your working life. Waiting is not free. It is the most expensive choice in this whole subject, and it is charged monthly.

I am equally plain about the other side of the comparison. Starting early does not require starting large. A $100 monthly contribution from age 25, at an assumed 7%, becomes about $262,000 by 65 in the same maths, from $48,000 of contributions. A $100 monthly contribution is not a retirement plan by itself for most people, and I would never pretend it is. But it is a beginning, and a beginning that compounds for forty years does work that a larger amount started late cannot easily match. The habit matters as much as the amount in the early years, because the habit is what keeps the money going in when markets fall, when pay is tight, and when other demands compete for the same dollars.

There is a second reason starting early matters, and it is psychological rather than mathematical. A saver who starts at 30 has lived through several market falls by 50, and has learned, from experience, that balances recover. A saver who starts at 50 meets the first serious fall with a large balance, a short horizon, and no lived experience of recovery, and is far more likely to sell at the worst moment. Time does not only compound money. It compounds confidence, and confidence is what keeps a plan intact when the news is frightening. I count that as a real return on starting early, even though no calculator can show it.

If you are reading this at 50 or 55 and you have not started, I want you to hear the other half of the message clearly: starting now is still far better than starting next year, and the catch-up rules exist precisely for you. The maths does not punish late starters out of spite. It rewards every year of compounding you give it, including the years from now. The comparison above is an argument for starting early. It is not an argument for giving up late, and the catch-up section later on this page is written for exactly that reader, with a plan that does not require heroics.

The 4% rule: where it came from, what it means, and where it breaks

The 4% rule is the most quoted number in retirement planning, and the most misunderstood, so I explain it from its source rather than from its slogan. In 1994, financial planner William Bengen published a study in the Journal of Financial Planning called Determining Withdrawal Rates Using Historical Data. He asked a narrow, well-posed question: using actual United States market history, what is the highest initial withdrawal rate that would have survived every thirty-year retirement period in the data, including the worst ones? He tested a portfolio of large company stocks and intermediate-term government bonds, between 50% and 75% in stocks, rebalanced annually, with the withdrawal amount raised each year for inflation. His answer was just over 4%, which he called SAFEMAX, the safe maximum. It was explicitly a worst-case result, not an average one. In most historical periods, a retiree could have withdrawn considerably more and still died with money left over.

The Trinity Study followed in 1998. Three professors at Trinity University, Philip Cooley, Carl Hubbard, and Daniel Walz, reframed the question in terms of success rates across rolling thirty-year periods from 1926 to 1995, and across a range of stock and bond mixes. Their headline finding was that a 4% inflation-adjusted withdrawal succeeded in about 95% of thirty-year periods with a balanced portfolio, and in about 98% with a higher stock allocation. That success-rate language is the source of the figure you still see quoted today, and it is important to understand what success meant in the study: the portfolio still had money at the end of thirty years. It did not mean the retiree lived comfortably, or that the balance never fell sharply, or that the retiree never had to worry. It meant the money lasted.

The mechanics I use on this page follow the original rule exactly. In the first year of retirement, you withdraw 4% of the starting portfolio. On a nest egg of $1,015,810, that is $40,632 a year, or about $3,386 a month. In every later year, you withdraw the same dollar amount, raised for inflation, regardless of what the portfolio is worth that year. You do not withdraw 4% of the current balance each year. That distinction is the whole rule, and losing it is the most common misunderstanding I encounter. Withdrawing a percentage of the current balance can never run out, because the withdrawal shrinks with the balance, but it also means your income falls sharply in a bad market, which is precisely when you need it not to. The 4% rule trades that flexibility for income stability, and the price of that trade is the possibility, in the worst historical cases, of the portfolio approaching zero near the end of the thirty years.

I am equally clear about where the rule breaks. It was tested on United States history, and United States markets have been exceptional by global standards. It was tested over thirty years, not forty or fifty, so a person who retires at 55 or 60 needs a lower starting rate or a more flexible plan. It assumed the retiree kept withdrawing the inflation-adjusted amount even in bad years, with no adjustment, no part-time work, and no other income, which is not how most people actually behave, and which makes the rule more conservative than real life in some ways and less conservative in others. It assumed a balanced portfolio with a substantial stock allocation, so a retiree holding only cash or only bonds cannot rely on it. And it says nothing about taxes, fees, or the order in which you withdraw from different accounts, all of which change the spendable income. I use the 4% rule on this page as a yardstick for translating a nest egg into a monthly income estimate, and I label it as an estimate every time. If your retirement is likely to last forty years, if you retire very early, or if your portfolio is very conservative, I would plan on a lower starting rate, in the region of 3% to 3.5%, and I would test the plan against the scenario table rather than trusting a single number.

There is a modern debate about the rule that I want you to know about, because you will meet it. Some researchers, looking at lower bond yields and higher stock valuations than the historical average, have argued for a lower safe rate, around 3.3%. Bengen himself, revisiting his work with later data, has suggested that a rate closer to 4.7% may be defensible with a more diversified portfolio and some flexibility. I do not adjudicate that debate here, because your plan should not depend on which side of it is right. A plan that works at 3.5% works at 4%. A plan that only works at 4.7% is fragile. I build for the lower figure and treat anything above it as room to breathe, and I suggest you do the same.

Inflation: why today’s dollars are the only dollars that matter

Inflation is the risk that never sends a bill, and it is the reason this calculator shows you two numbers for every result: the nominal number, in the dollars of the year you retire, and the real number, in today’s dollars. A nest egg of $1,015,810 sounds like a fortune. At 3% inflation over thirty years, it buys what about $418,500 buys today. That is still a substantial sum, and I do not want you to read the smaller number as bad news. I want you to read it as the truth about what your retirement income will actually buy, because the prices you will pay in retirement are the prices of that future year, not the prices you pay now.

I will show you the mechanism with a single monthly income, because income is where inflation bites. Suppose your plan pays you $3,386 a month in the first year of retirement, which is the 4% income on the default nest egg. If inflation then runs at 3% a year and your income does not rise, then after ten years that $3,386 buys what about $2,520 buys today. After twenty years, it buys what about $1,873 buys today. After thirty years, about $1,395. The cheque stays the same. The life it buys shrinks by more than half. That is why the 4% rule, properly applied, raises the withdrawal amount for inflation every year: the dollar amount must rise so that the purchasing power stays level. And that is why a retirement plan that produces a fixed nominal income, with no inflation adjustment, is a plan that slowly fails even while it appears to succeed.

The inflation assumption you type into this calculator is your choice, and I set the default to 3% because that is close to the long-run average rate of consumer price inflation in the United States over recent decades, and because it is a round, honest planning assumption rather than a forecast. It is not a prediction. Inflation over your working life will not be 3% every year. Some years it will be higher, some lower, and a decade of higher inflation early in retirement is one of the most damaging things that can happen to a plan, because it permanently raises the dollar amount you must withdraw. I show you the sensitivity by letting you change the assumption: set it to 4% and watch the today’s-dollars figure fall, set it to 2% and watch it rise. The gap between those two readings is the uncertainty you are planning around, and it is larger than most people expect.

There are two defences against inflation, and I use both. The first is to hold assets that have historically outpaced inflation over long periods, which in practice means holding a substantial allocation to stocks through retirement, not moving everything to cash at 65. Stocks are volatile, and I do not pretend otherwise, but over thirty years they have been the main engine that kept retirement income ahead of prices. The second defence is to have income that rises with prices, or at least partly. Social Security benefits in the United States receive cost-of-living adjustments, which is one reason I treat Social Security as the inflation-protected floor of a plan. Some pensions rise with inflation, most do not. An annuity with rising payments costs more than a level one, and I cover that trade on the annuity page. Here, the practical point is simpler: judge every retirement number in today’s dollars, keep growth assets in the plan, and do not mistake a large nominal balance for a large real income.

This table deflates the default nest egg and its 4% monthly income at three inflation assumptions over thirty years. The figures are rounded, and they use the same division I use in the calculator: the future amount divided by 1 plus the inflation rate, raised to the number of years. I include the table because the range matters more than any single row. One point of inflation, sustained for thirty years, moves the real value of your nest egg by roughly a quarter. That is the scale of the risk, and it is why I never quote a retirement number without its today’s-dollars twin.

Where to save: 401(k), IRA, Roth, and taxable accounts in the USA

The account you save in changes how much of your money you keep, and in what order you can use it, so I explain the main United States account types as I understand them, in plain language, with the tax treatment stated for each. I am not giving you tax advice, and your own situation may differ, but the structure is stable enough that you can plan around it, and the limits I cite are the verified 2026 figures from the Internal Revenue Service, which I list in the next section.

A 401(k) is an employer plan. You contribute from your paycheque, usually before tax in a traditional 401(k), your employer may match part of your contribution, and the money grows tax-deferred until you withdraw it in retirement, when withdrawals are taxed as ordinary income. A designated Roth 401(k), where your plan offers one, takes contributions after tax, grows tax-free, and comes out tax-free in retirement if the qualified conditions are met. The match is the feature that dominates every other consideration: an employer match is an immediate, guaranteed return on your contribution that no investment can match, and I regard contributing at least enough to get the full match as the first step in any retirement plan, before any other saving. I model the match in full on the 401(k) calculator page, because it deserves its own tool.

An Individual Retirement Arrangement, or IRA, is an account you open yourself, outside any employer. A traditional IRA generally takes contributions that may be deductible, depending on your income and whether you are covered by a workplace plan, and the money grows tax-deferred until withdrawal, when it is taxed as ordinary income. A Roth IRA takes contributions after tax, with no deduction, grows tax-free, and comes out tax-free in retirement if the qualified conditions are met, and it has no required minimum distributions during the owner’s lifetime. The choice between traditional and Roth is, at its heart, a bet on tax rates: if your tax rate in retirement will be lower than your rate today, the traditional account usually wins, because you deduct at the higher rate and pay at the lower one. If your rate in retirement will be higher, the Roth usually wins. Most people do not know their future rate, and many sensibly hold some of each, so that they can choose, year by year in retirement, which account to draw from to manage their tax bill. That flexibility, the ability to manage your taxable income in retirement, is the underrated advantage of holding both types.

A taxable brokerage account has no contribution limit, no required distribution, and no age restriction on withdrawals, and it is taxed each year on dividends and interest, and on capital gains when you sell. Long-term capital gains, on assets held for more than a year, are generally taxed at lower rates than ordinary income for most taxpayers, which makes the taxable account a useful third layer: money for early retirement before 59 and a half, money for goals that are not retirement, and a source of withdrawals that can be managed for tax. I place it third in priority for most people, after the matched 401(k) and the IRA, because its tax treatment is less favourable than either, but I do not dismiss it. A plan that can only be touched after 59 and a half is a plan with a gap in it for anyone who wants to retire earlier, and the taxable account is the usual way to fill that gap.

Two more account types deserve mention, because they appear in many households. A Health Savings Account, available only with a qualifying high-deductible health plan, is triple tax-advantaged in the United States: contributions are deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. After 65, it can also be used for non-medical spending, taxed as ordinary income like a traditional IRA. For a saver who expects substantial health costs in retirement, which is most people, it is a powerful retirement account disguised as a health account. And a 403(b) or 457(b) plan, for employees of nonprofits, schools, and governments, works much like a 401(k), with the same 2026 elective deferral limit of $24,500 under IRS Notice 2025-67, and with its own additional rules, including a separate limit for many 457(b) plans and special catch-up provisions in some 403(b) plans that I do not model here. If you have one of those plans, the contribution limits in the next section apply to you in the same way, but you should confirm the plan-specific rules with your administrator.

I built this table from the general tax treatment of each account type, not from any one plan document. Individual plans vary, state tax treatment varies, and the qualified conditions for tax-free Roth withdrawals, which include the five-year rule and the age 59 and a half condition, must be checked for your own account. I state the structure here so you can see the shape of the choice. The exact figures for your year are in the next section, and your plan document governs the rest.

2026 contribution limits I verified, and how to use them

I verified the 2026 figures on this page against the Internal Revenue Service announcement, and I cite the source by name and date so you can check it yourself. On 13 November 2025, the IRS issued news release IR-2025-111, headed 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500, with the detailed cost-of-living adjustments in IRS Notice 2025-67. Those are the figures I use here, and they are the figures that govern contributions made for the 2026 tax year. If you are reading this in a later year, do not use these figures. Check the IRS announcement for that year, because the limits are adjusted annually for inflation and they move.

The 2026 elective deferral limit for 401(k), 403(b), most governmental 457(b) plans, and the federal Thrift Savings Plan is $24,500, up from $23,500 in 2025. That limit covers your own pre-tax and Roth contributions combined, per person, across all such plans. You cannot put $24,500 into each plan you hold. If you change jobs mid-year, your deferrals at both employers count toward the one limit, and payroll at the new job will not know what you put in at the old one, so you must track it yourself. The standard catch-up contribution for participants aged 50 and over is $8,000 for 2026, up from $7,500, bringing the total employee deferral to $32,500 for those aged 50 and over. Under the SECURE 2.0 Act, a higher catch-up applies to employees aged 60, 61, 62, and 63: for 2026 that higher catch-up remains $11,250, unchanged from 2025, bringing the total to $35,750 for those four ages. At 64, the catch-up falls back to the standard $8,000. The higher catch-up replaces the standard one for those ages, it does not add to it, and it applies only if your plan has adopted it, so confirm with your plan administrator before you change your election.

The overall limit on annual additions to a defined contribution plan, which is your contributions plus your employer’s contributions combined, is $72,000 for 2026, up from $70,000 in 2025, not counting catch-up contributions, which sit on top of it. The compensation that can be counted under a plan is capped at $360,000 for 2026, up from $350,000. The IRA limit for 2026 is $7,500, up from $7,000, with a catch-up of $1,100 for those aged 50 and over, up from $1,000, bringing the IRA total to $8,600 at 50 and over. The IRA limit is shared across all of your traditional and Roth IRAs combined, and it cannot exceed your taxable compensation for the year, with the spousal exception for a non-working spouse on a joint return. The income ranges for deductible traditional IRA contributions, for Roth IRA eligibility, and for the Saver’s Credit all rose for 2026 as well, and I do not reproduce those ranges here, because they depend on filing status and on whether you are covered by a workplace plan, and the IRS notice is the authoritative source for the range that applies to you.

One 2026 change deserves its own paragraph, because it affects higher earners directly. Under SECURE 2.0, from 1 January 2026, employees aged 50 and over whose prior-year FICA wages from the plan-sponsoring employer exceeded $150,000, based on 2025 wages, must make all of their catch-up contributions as Roth contributions, after tax, rather than pre-tax. The threshold is indexed for inflation and it is measured employer by employer, on FICA wages, not on total household income. If your plan does not offer a Roth option, you cannot make catch-up contributions at all until the plan is amended to add one. I state this rule as it was announced for 2026, and I advise you to confirm with your plan administrator whether your plan has implemented it and how it applies to you, because implementation has varied.

How do I use these limits in practice? I use them as ceilings, not as targets, and I use them in priority order. First, I contribute enough to the 401(k) to get the full employer match, whatever percentage that requires. Second, I consider the IRA, traditional or Roth according to the tax-rate bet I described above, up to the $7,500 limit. Third, I return to the 401(k) and raise the deferral toward the $24,500 limit, or the catch-up limit if I am 50 or over, as cash flow allows. Fourth, I use a taxable account for anything beyond that, or for money I may need before 59 and a half. That order is a starting point, not a law, and it changes if your 401(k) has very high fees, in which case the IRA may deserve priority after the match, or if you have high-interest debt, which deserves priority over all of it. The limits tell you how much room you have. The order tells you how to fill it. Neither tells you how much you must save, which is a question this calculator, and the spending method at the start of this page, are built to answer.

Sources for this table: IRS news release IR-2025-111, 13 November 2025, and IRS Notice 2025-67, the 2026 cost-of-living adjustment notice. I checked the super catch-up figure against the IRS statement that it remains $11,250 for 2026, and the 2025 comparisons against the same announcement. If any figure on this page differs from the IRS notice for your year, the IRS notice governs.

Social Security: the floor under your plan, not the plan itself

I do not put Social Security benefit tables on this page, deliberately. Social Security is a separate calculation, with its own earnings record, its own claiming ages, and its own benefit formula, and it deserves its own calculator, which I plan as a separate page. What I do here is explain the role it plays in your retirement plan, so that you do not over-count it and do not under-count it either, and so that the gap you calculate at the start of this page is honest.

Social Security is, for most Americans, the largest single source of retirement income, and the only one that is inflation-adjusted, guaranteed for life, and not dependent on market returns. That combination makes it the floor of the plan. The floor matters because it covers part of your essential spending whatever happens to your investments, and because it is the income that lets you take investment risk with the rest of your money. A retiree whose essential spending is fully covered by Social Security and a pension can afford a more aggressive portfolio and a more flexible withdrawal plan than a retiree whose essential spending depends entirely on savings. I think of Social Security as the reason the rest of the plan can breathe.

It is not the plan itself, for three reasons. First, the average benefit replaces only part of pre-retirement earnings, roughly 40% for a typical earner by the Social Security Administration’s own framing, and less for higher earners, because the benefit formula is progressive. Second, the age at which you claim changes the benefit substantially, and claiming early, at 62, permanently reduces it, while delaying to 70 permanently increases it, with full retirement age depending on your birth year. The claiming decision is one of the largest financial decisions most people make, and I do not make it for you here. Third, the system’s long-term financing is a matter of public debate, and while I do not predict legislation, I do not build a plan that collapses if benefits are reduced in the future. I build a plan in which Social Security covers the floor, savings cover the gap, and a reduction in the floor would hurt but not destroy the plan. That is the right shape of prudence for a benefit that is politically contested but historically durable.

My practical advice is simple. Get your own earnings record and benefit estimate from the Social Security Administration, through your my Social Security account, and use the estimate for your own claiming age, not a national average. Put that estimate into the gap calculation at the start of this page as guaranteed income, alongside any pension. Then build your savings plan to cover the remaining gap, with the margin I described. If you have a spouse, coordinate the claiming decision, because survivor benefits and spousal benefits change the optimum, and the higher earner’s claiming age often determines the survivor’s lifetime income. That coordination is worth more than any single year’s market return, and it costs nothing but attention.

Fees: the 1% that costs far more than 1%

A fee of 1% a year sounds small. It is not small. It is charged on your whole balance, every year, for every year you save, and it compounds against you exactly as surely as a return compounds for you. I will show you the cost with the default numbers on this calculator, because the default numbers are the ones you have already seen. At an assumed 7% return with no fee, $50,000 plus $500 a month for thirty years becomes about $1,015,810. At the same 7% return with a 1% fee, the net return is 6%, and the same saving becomes about $803,386. The fee cost you about $212,424, which is more than the $230,000 you put in, and it cost you that much without ever appearing as a bill. It appeared as a smaller balance, quietly, every month, for thirty years.

Fees come in several forms, and I want you to find all of them in any account you hold. An expense ratio is the annual cost of a fund, expressed as a percentage of assets, and it is deducted from the fund’s returns before you see them. A low-cost broad index fund may charge 0.03% to 0.20% a year. An actively managed fund may charge 0.50% to 1.50% a year. An advisory fee, charged by a financial adviser as a percentage of assets under management, is commonly around 1% a year, sometimes more for smaller accounts. A 401(k) plan may add an administrative fee, a recordkeeping fee, or a fee for a particular investment option, and an annuity wrapper may add mortality, rider, and subaccount charges that stack to 2% or 3% a year, as I explain on the annuity page. None of these fees is illegitimate by itself. The question is always what you receive for it, and whether a cheaper alternative gives you the same thing.

My test is the one built into this calculator. Type in your return, then type in the all-in fee as the fee input, and read the nest egg. Then set the fee to zero and read it again. The difference is what the fees cost you in final wealth, and the difference in the monthly income figure is what they cost you in retirement income, every month, for as long as the money lasts. If the difference is larger than the value of the advice, the guarantee, or the convenience you are buying, I walk away, or I buy the cheaper version. In a 401(k), I check the fee for each investment option, not just the plan as a whole, because two funds in the same plan can differ by a full percentage point, and the expensive one rarely earns it. In an IRA, I check the fund expense ratio, because that is the fee I control most directly, and because the cheapest broad index funds in the United States are now very cheap indeed.

I also want to warn you about a fee that is not a percentage: the fee of complexity. A product with layers of charges, surrender periods, and riders that you cannot explain back to me in two sentences is charging you for confusion, whether or not a line item says so. Simplicity has a return of its own, in the form of a plan you understand well enough to keep when markets fall. I prefer a simple, low-cost portfolio that I understand to a complex, expensive product that I do not, even when the complex product’s illustration looks better, because the illustration is a scenario and the fee is a certainty.

Risk, sequence, and why the return is never a straight line

This calculator shows you a smooth line: the same return, every month, for thirty years. Real markets never do that. Real returns arrive in bursts and falls, in good decades and bad ones, and the order in which they arrive matters far more than the average. That order is called sequence risk, and it is the most important limitation of any calculator that uses a constant return, including this one. I explain it here so that you use the smooth line as a planning guide and not as a prediction.

During the saving years, sequence matters less than you might fear, and in one way it helps you. If markets fall early, when your balance is small, you lose little in dollars, and your monthly contributions buy more shares at lower prices. If markets fall late, when your balance is large, you lose more in dollars, but you have fewer years left to recover, and the fall hurts. The classic illustration is two savers with the same average return but opposite sequences: the saver who gets the bad years first and the good years last ends with more money than the saver who gets the good years first and the bad years last, because the contributions made during the bad years compound for longer. The average is the same. The ending balance is not. That is why I show you three return scenarios rather than one, and why I ask you to plan around the lower one.

During the withdrawal years, sequence matters enormously, and it matters in the opposite direction. A retiree who meets a market fall in the first five years of retirement, while withdrawing a fixed inflation-adjusted amount, sells more shares at lower prices to fund the same spending, and the portfolio may never recover, even if later returns are strong. A retiree who meets the same fall twenty years into retirement, when the portfolio has already grown, is far less damaged. This is sequence-of-returns risk in retirement, and it is the reason the 4% rule was tested against the worst historical sequences rather than against the average sequence. The rule survives the worst case because it was built from the worst case. Your plan should be built the same way: assume that a bad sequence is possible, keep a cash reserve for the first years of retirement so you are not forced to sell in a fall, and be willing to adjust spending, temporarily, after a bad year. Flexibility in withdrawal is the most powerful defence there is, and it costs nothing.

I also want to say something about risk tolerance, honestly. Risk tolerance is not a questionnaire score. It is what you actually do when your balance falls by 30% and the news is frightening. Most people overestimate it in good times and discover the truth in bad times. The defence is not to take no risk, because taking no risk guarantees that inflation erodes your money, which is itself a risk, and a certain one. The defence is to take a level of risk you can live with through a fall, to diversify across stocks and bonds in proportions you understand, to rebalance periodically so that you sell what has risen and buy what has fallen, and to keep enough in stable assets that a fall does not force you to sell investments to pay for living. I do not set your allocation on this page, because it depends on your age, your horizon, your other income, and your temperament. I set the frame: risk is real, sequence is real, and a plan that only works if returns arrive smoothly is not a plan.

Behind at 50? The catch-up years, and a realistic recovery plan

If you are 50 or older and your retirement savings are smaller than you wish they were, I want you to read this section as a plan, not as a scolding. The tax code gives you extra room precisely at this age, and the remaining years, while fewer than a thirty-year-old’s, are still long enough for substantial compounding, especially if you use all three levers: save more, retire a little later, and spend a little less in the early years of retirement. No single lever has to do all the work, and that is what makes the plan realistic.

The first lever is the catch-up contribution. For 2026, as I verified in the limits section, the 401(k) catch-up for those aged 50 and over is $8,000, bringing the total employee deferral to $32,500, and the super catch-up for ages 60 to 63 is $11,250, bringing the total to $35,750. The IRA catch-up is $1,100, bringing the IRA total to $8,600. Those are ceilings, and I do not expect most people to reach them. But even part of the catch-up room, used every year from 50 to 65, changes the answer materially. Saving $1,000 a month from 50 to 65 at an assumed 7% becomes about $316,000, from $180,000 of contributions. Saving $1,500 a month over the same fifteen years becomes about $474,000, from $270,000 of contributions. The growth in the second case is about $205,000, which is more than a full year of the saver’s own contributions, earned by fifteen years of compounding on a balance that was still growing. I give you those figures from the same maths as the calculator, so you can reproduce them by setting the ages and the monthly amount accordingly.

The second lever is retiring later, and it is the most powerful lever of all, because it works on every side of the equation at once. Retiring at 67 instead of 65 gives you two more years of contributions, two more years of compounding, two fewer years of withdrawals, and, if you delay Social Security, a larger guaranteed benefit for life. The effect on the nest egg alone is striking: the default saver in this calculator, $50,000 plus $500 a month at 7%, has about $1,015,810 at 65, and about $1,180,800 at 67, from two more years of the same saving. That is roughly $165,000 for two years, most of it growth on a balance that was already large. I am not telling you to work until you drop. I am telling you that a part-time bridge, a phased retirement, or a delay of two years, where health and employment allow it, is worth more than any investment decision you will make in those two years, and it is worth considering before you conclude that you are behind.

The third lever is spending, and I handle it with care, because spending less in retirement is not a punishment, it is a choice about what matters. A retiree who needs $3,000 a month from savings needs a nest egg of $900,000 at a 4% withdrawal rate. A retiree who needs $2,500 a month needs $750,000. The $150,000 difference is the price of $500 a month of spending, and it is a price you can pay either by saving more now or by spending less later. I prefer a plan that does both a little: save a little more now, and plan a retirement budget that is honest about what you will actually spend, with the discretionary spending, travel and gifts, as the flexible part that can shrink in a bad year and grow in a good one. That flexibility is what makes a plan survive, and it is available to every saver, whatever their age.

My recovery plan, written out, is this. First, contribute enough to get the full employer match, today, without exception. Second, raise your contribution by 1% of pay each year, or by half of every pay rise, until you reach the catch-up limit or the limit of what you can afford. Third, if you are 50 or over, use the catch-up room in the 401(k) and the IRA, in the priority order I gave in the limits section. Fourth, check your fees and move to low-cost options where you can, because the fee saving is a guaranteed return. Fifth, set a retirement age that is honest, and revisit it every year, rather than fixing it at 65 because that is the conventional number. And sixth, get your Social Security estimate and your claiming strategy right, because a larger guaranteed benefit is worth more, over a long retirement, than a larger balance that must be withdrawn. None of these steps requires heroics. Together, they are the difference between behind and on track, and I have seen them work for people who started later than you think.

Three worked examples I use

Example one: the default saver, 35 to 65

A 35-year-old has $50,000 saved, contributes $500 a month, and assumes a 7% return with 3% inflation. The calculator gives a nest egg of about $1,015,810 at 65, from $230,000 contributed in total, so growth is about $785,810. The 4% rule gives a first-year monthly income of about $3,386, which is about $1,395 in today’s dollars, and the nest egg itself is about $418,500 in today’s dollars. I like this example because it shows the proportions honestly: growth is more than three times the money put in, and inflation takes more than half the nominal value. If the return comes in at 6% instead of 7%, the nest egg falls to about $803,386 and the monthly income to about $2,678. If it comes in at 8%, the nest egg rises to about $1,291,966 and the monthly income to about $4,307. The plan lives in that range, and the saver who knows the range is better prepared than the saver who knows only the middle number.

Example two: the late starter who raises the contribution every year

A 45-year-old has $20,000 saved, contributes $800 a month, and raises the contribution by 3% a year, roughly keeping pace with pay rises, at an assumed 7% return. Over twenty years to 65, the contributions total about $258,000, because the monthly amount rises from $800 to about $1,404 by the final year, and the nest egg reaches about $604,000. I give this example rounded, because the contribution-increase maths depends on the exact anniversary timing, and I want you to reproduce it in the calculator by setting the contribution increase field to 3 and reading the schedule. The lesson is that raising the contribution with pay is the painless way to save more, because you never feel the increase as a cut: your take-home pay still rises each year, just by a little less than it otherwise would. A 3% annual rise in the contribution, sustained for twenty years, raises the final monthly amount from $800 to about $1,404, and it does so without a single year of sacrifice.

Example three: the couple who test retiring at 67 instead of 65

A couple, both 60, have $300,000 saved between them, contribute $1,500 a month combined, and assume a 6% return. At 65, five years of saving gives them about $509,000. At 67, seven years gives them about $612,000, from $36,000 of extra contributions and about $67,000 of extra growth and compounding on a larger balance. The monthly income at 4% rises from about $1,698 to about $2,041. I give these figures rounded from the same monthly compounding maths, and I want you to notice what did the work: not the extra contributions, which were modest, but the extra two years of growth on a balance near $500,000, and the two fewer years the money must last. For a couple in their early sixties, the decision to work two more years, even part-time, is often the single most valuable retirement decision available, and it is available without any change in investment strategy at all.

Mistakes I see, and how I avoid them

The first mistake I see is saving a round number with no connection to spending. A person saves $200 a month because $200 sounds reasonable, retires, and discovers that $200 a month was never going to cover the gap between spending and Social Security. I avoid it by working backwards, as I do at the start of this page: spending, minus guaranteed income, equals the gap, and the gap, divided by 4%, equals the nest egg, and the nest egg, fed into this calculator, equals the monthly contribution. The monthly amount is the output of the method, not the input to it. If the output is more than you can afford, you change the retirement age, the spending, or the claiming strategy, and you do so on purpose, with the numbers in front of you.

The second mistake is stopping contributions in a market fall. The balance drops, the news is frightening, and the saver pauses the contribution to wait for calmer times. That pause is the most expensive decision in the whole subject, because it removes money from the market precisely when prices are lowest, and because the contributions that are missed never compound. I avoid it by treating the contribution as a bill, paid automatically, before I see the money, and by remembering that a fall early in a saving career is a gift in disguise: the same monthly amount buys more, and the recovery, when it comes, compounds on a larger holding. The savers who do best are rarely the savers who pick the best investments. They are the savers who never stop.

The third mistake is cashing out a 401(k) when changing jobs. A $30,000 balance, cashed out at 35, loses tax and, usually, the 10% additional tax on early distributions, and it loses thirty years of compounding, which at 7% would have made it about $243,000 by 65. I avoid it by rolling the balance directly into an IRA or into the new employer’s plan, without touching the money, and by treating a job change as an administrative event, not as a windfall. The rollover is paperwork. The cash-out is a decision that costs a quarter of a million dollars in future wealth, and it is made in an afternoon.

The fourth mistake is the one I am most sympathetic to, because the industry encourages it: chasing last year’s best-performing fund, or the investment that a friend, a headline, or a social media account recommends. Performance chasing buys high and sells low, systematically, and it pays high fees for the privilege. I avoid it by holding a simple, diversified, low-cost portfolio, by rebalancing on a schedule rather than on a feeling, and by judging my plan on whether the monthly contribution is going in and the fees are low, not on whether this quarter’s return beat some index. The plan is the portfolio. The portfolio is not the plan.

Glossary, in my plain language

Sources I relied on for the facts on this page: IRS news release IR-2025-111, 13 November 2025, headed 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500, and IRS Notice 2025-67, the 2026 cost-of-living adjustment notice for retirement plans and IRAs; the SECURE 2.0 Act of 2022, for the RMD ages, the super catch-up for ages 60 to 63, and the Roth catch-up rule for higher earners from 2026; William Bengen, Determining Withdrawal Rates Using Historical Data, Journal of Financial Planning, 1994, and Cooley, Hubbard, and Walz, the Trinity Study, 1998, for the 4% rule; and the Social Security Administration’s framing of benefit replacement rates, cited in general terms only, with no benefit table reproduced. Where I give a worked number, I label the assumptions, and I checked every worked number with the calculator above, at the stated assumptions. The 2027 limits had not been announced in the IRS material I checked in late October 2026, so this page uses the 2026 figures and tells you to check the IRS announcement for any later year.

PayByCountry is an independent calculator website, not a government website and not a financial adviser. This page is an educational estimate tool for the United States. It is not financial, tax, or legal advice, and it does not recommend any product, fund, or course of action. Projections use a constant assumed return and are illustrations, not predictions or guarantees. Market returns vary, inflation varies, tax law changes, and your plan document governs your own accounts. Check current IRS guidance for the year in which you act, and consider independent, fee-only advice before you make a major retirement decision.