How Long Will My Money Last? A Simple Guide to Making Retirement Savings Last
Direct Answer
How long will my money last in retirement? It depends on four things: how much you have saved, how much you withdraw each year, what return your savings earn, and how long your retirement lasts. As a rough guide, withdrawing about 4% of your savings in the first year and then raising that amount with inflation each year has historically lasted 30 years or more — but a higher withdrawal rate, high inflation, or poor early returns can shorten that considerably.
Key Takeaways
- There is no single answer to “how long will my money last” — it is a calculation, not a fixed number.
- The withdrawal rate matters more than almost anything else: small yearly increases in spending shorten the life of savings fast.
- The widely cited 4% rule means withdrawing 4% in year one, then adjusting for inflation — Fidelity’s research points to roughly 4% to 5% as a sustainable first-year range.
- Guaranteed income such as Social Security or a pension stretches savings because it covers part of spending every month for life.
- Inflation, market falls early in retirement, and living longer than expected are the three biggest risks to savings lasting.
- A retirement withdrawal calculator gives a personal estimate in minutes — this guide shows you exactly what to enter.
How Long Will My Money Last? Start With the Four Numbers
Every answer to “how long will my money last” comes from the same four inputs. Change one, and the answer changes:
- Your starting balance — the total across savings, retirement accounts, and any other money you plan to draw on.
- Your yearly withdrawal — how much you take out in the first year, and whether that amount rises with inflation.
- Your investment return — what the remaining balance earns while it waits to be spent.
- Your time horizon — how many years the money must cover. Retirement can last 25 years or more, so planning for a long retirement is not pessimism; it is realism.
That is why two people with the same savings can get very different answers. One spends $40,000 a year from $1 million; the other spends $60,000 a year from the same $1 million. The second person’s money runs out decades sooner, as the worked example below shows.
How Long Will My Retirement Savings Last? A Worked Example
The table below is an illustrative calculator model, not a promise. It assumes a $1 million starting balance, withdrawals rising 2.5% a year with inflation, and a steady 6% average annual return. Real returns vary year to year, so treat these figures as a comparison tool, not a forecast.
| First-year withdrawal | Yearly amount | How long $1 million lasts (illustration) |
|---|---|---|
| 3% | $30,000 | About 45 years or more |
| 4% | $40,000 | About 52 years in this model, and historically 30+ years under the 4% rule |
| 5% | $50,000 | About 32 years |
| 6% | $60,000 | About 24 years |
Two lessons stand out. First, moving from 4% to 6% does not just cost 50% more spending — it can cut the life of the savings by more than half. Second, the return assumption matters enormously: at a lower average return, every withdrawal rate runs out sooner. Always test a cautious case — a lower return than you hope for — before trusting an optimistic one.
What Is the 4% Rule?
The 4% rule is a rule of thumb for retirement spending. It says: withdraw 4% of your savings in the first year of retirement, then raise that dollar amount each year to keep pace with inflation. On $1 million, that means $40,000 in year one. On $500,000, it means $20,000 in year one.
The idea comes from research into how long savings survived across many historical market periods. The finding was that a 4% starting rate, adjusted for inflation, historically lasted at least 30 years in most cases. It is a guideline, not a guarantee: it assumes the money stays invested in a mix of assets, and it cannot foresee your personal returns, inflation, or lifespan.
Fidelity’s own research lands in a similar place: as an estimate, aim to withdraw no more than 4% to 5% of your savings in the first year of retirement, then adjust that amount every year for inflation, for a high degree of confidence that a consistent spending amount lasts. For a 30-year retirement with a balanced portfolio, its analysis found a 4.6% withdrawal rate would have been sustainable about 90% of the time; for a 25-year retirement, that figure was 5.0%.
What is a sustainable withdrawal rate?
A sustainable withdrawal rate is simply the percentage of your savings you can withdraw each year, adjusted for inflation, without running out of money over your retirement. It is not a rate anyone can hand you personally — it depends on your time horizon, your investment mix, and how much flexibility you have to cut spending in a bad year. The 4% rule is one popular estimate of it, not a law of nature.
How Much Can I Withdraw Each Year Without Running Out?
Use this simple three-step check:
- Work out your yearly spending gap. Add up your expected yearly spending, then subtract guaranteed income — Social Security, a pension, rental income, or part-time work. The gap is what your savings must cover.
- Divide the gap by your savings. If the gap is $40,000 and you have $1 million, that is a 4% withdrawal rate. If the gap is $60,000 on the same $1 million, that is 6% — a rate that needs a hard look.
- Test it against time. Ask: does this rate need to last 20 years, 30 years, or 40 years? Longer horizons need lower starting rates, because there are more years for inflation and market falls to do damage.
If the rate comes out above 5%, you have four levers, covered later in this guide: spend less, retire later, add guaranteed income, or accept more flexibility in bad years. None of them is painless, but all of them beat discovering the problem ten years in.
How Long Will My Savings Last If I Keep Them in a Bank Account?
Savings held only as cash face a quieter risk: inflation. If your money earns less than inflation, its buying power shrinks every year even though the balance looks stable. That is why most retirement plans keep at least part of savings invested for growth, and why understanding how interest works matters. Our guide to annual percentage yield (https://updatemag.com/annual-percentage-yield/) explains how APY works and how to compare accounts — useful background before deciding where to hold the cash portion of your retirement money.
The practical point is this: “how long will my savings last” is not only about the balance going down. It is about whether each year’s withdrawal still buys what it bought the year before. A plan that ignores inflation will look fine on paper and feel tighter every single year.
Does Social Security Make My Savings Last Longer?
Yes — significantly. Social Security is guaranteed income for life: it does not run out, it is not a pot you can empty, and it rises with cost-of-living adjustments. Every dollar of monthly spending it covers is a dollar your savings do not have to provide, which directly lowers your withdrawal rate and stretches how long your money lasts.
Timing matters. In the US, you can generally claim Social Security from age 62, but claiming early permanently reduces the monthly payment — by as much as 30% compared with full retirement age, which is 67 for people turning 62 in 2026. Delaying past full retirement age raises the benefit by about 8% per year up to age 70. For someone with limited savings, Social Security may be the largest source of lifetime retirement income, so the claiming decision deserves as much attention as the withdrawal rate.
Pensions work similarly when they pay for life, with one important difference: most private pensions do not automatically rise with inflation, so a fixed $2,000 a month buys less at 85 than it did at 65. That makes inflation protection in the rest of your plan even more important.
How Long Will My 401(k) Last?
The maths for a 401(k) is the same as for any retirement account: balance, withdrawal rate, return, and time horizon. But 401(k)s have a few extra rules worth knowing, because they change how withdrawals behave:
- Withdrawals are generally taxed as ordinary income when they come from a traditional, pre-tax 401(k). Your spending money is the after-tax amount, so factor tax into the gap calculation above.
- Early withdrawals can attract a penalty. Taking money before age 59½ can mean a 10% early-withdrawal penalty on top of income tax, with some exceptions — another reason retiring very early needs a separate plan for the gap years.
- Required minimum distributions apply later. In the US, traditional 401(k)s currently require minimum withdrawals starting at age 73. That means the government eventually sets a floor under your withdrawals whether you need the money or not, which can push your withdrawal rate up in later years.
Your 401(k) is also only one piece of the puzzle. Social Security, pensions, taxable accounts, and any other savings all share the job of covering spending — judging a 401(k) balance alone will almost always give a misleading answer.
Can I Retire at 60?
Retiring at 60 is possible for some people and unrealistic for others, and the deciding factor is rarely the account balance alone. Ask these questions first:
- How many years must savings cover? Retiring at 60 instead of 67 adds seven years of withdrawals and removes seven years of saving and growth. That is a double cost.
- What covers the gap years? In the US, Social Security generally cannot begin before 62, and Medicare generally does not begin until 65. Retiring at 60 means funding health insurance privately for about five years — a major cost that is easy to overlook.
- What is the spending gap? If guaranteed income will eventually cover most spending, early retirement is far more feasible than if savings must cover nearly everything from day one.
A common, realistic adjustment is retiring a few years later than first hoped, which both shortens the funding period and raises guaranteed income. If retiring at 60 is the goal, the plan needs to show — with numbers, not hopes — how the 60-to-65 gap years are funded and what withdrawal rate applies once they are over.
What Makes Money Run Out Faster?
Four risks shorten how long savings last, and all four are worth planning for:
| Risk | What happens | What helps |
|---|---|---|
| High withdrawals | Spending 6% a year drains the pot far faster than 4% | Keep the first-year rate near 4–5%, and trim spending after bad years |
| Inflation | Each year’s withdrawal buys less unless it rises | Raise withdrawals with inflation, and keep some growth assets |
| Bad early returns | Market falls just after retiring damage savings permanently, because you sell while prices are low | Hold a cash reserve for a year or two of spending; be flexible in down years |
| Living longer than planned | A plan built for 20 years fails in year 21 | Plan for 30+ years, and lean on guaranteed lifetime income |
The “bad early returns” risk has a name: sequence-of-returns risk. Two retirees can earn the same average return over 30 years and get very different outcomes if one suffers big falls in the first few years while withdrawing. The defence is flexibility — skipping an inflation increase for a year or two, or trimming spending after a sharp fall, can add years to a plan. Vanguard’s guidance makes the same point: if a sharp market decline cuts your portfolio by 10% or more, consider tightening spending for a while rather than withdrawing on autopilot.
How Do I Calculate How Long My Money Will Last?
A retirement withdrawal calculator does this maths in minutes. Here is what to enter, and why each input matters:
- Current savings balance — everything you plan to draw on, not just one account.
- Yearly withdrawal — start with your spending gap (spending minus guaranteed income), not your total spending.
- Expected return — use a cautious figure, and try a lower one too, so you can see the cautious case.
- Inflation — typically around 2–3% a year in illustrations; this is what makes withdrawals rise over time.
- Time horizon — how many years the money must last. Try 30 years even if that feels long; it is the safer test.
Run the calculation three times: with your hoped-for return, with a lower return, and with a longer horizon. If the money only lasts in the optimistic case, the plan needs one of the levers below — not more optimism.
What Can I Do If My Savings Look Short?
If the calculation says your money may not last, these are the levers that genuinely move the answer, in rough order of impact:
- Retire a little later. Each extra working year adds savings, adds growth, shortens the funding period, and can raise Social Security. Even two or three years can transform the maths.
- Spend a little less, especially early. Cutting the first-year withdrawal from 6% to 5% or 4.5% has a larger effect than the same cut made later, because the money stays invested longer.
- Delay Social Security if you can. A larger guaranteed monthly payment lowers the gap your savings must fill for the rest of your life.
- Build flexibility into the plan. Agree in advance that you will skip inflation increases or trim discretionary spending after a bad market year. A plan with a pressure valve lasts longer than a rigid one.
- Track spending properly. Most shortfalls start as small, unnoticed overspending, not one big mistake. A simple budgeting tool helps here — see our comparison of the best budget apps (https://updatemag.com/best-budget-apps/) for options that track spending against a plan.
None of this is a substitute for personal advice. If the numbers are close or the decisions are large — especially around pensions, tax, or claiming ages — a qualified financial adviser can model your exact situation. This guide is general education: it shows how the maths works, not what you personally should do.
Frequently Asked Questions
How long will $1 million last in retirement?
It depends on the withdrawal rate. In the illustrative model above (6% return, 2.5% inflation), $1 million withdrawn at $40,000 a year lasts about 52 years; at $50,000 a year, about 32 years; at $60,000 a year, about 24 years. Under the 4% rule, $1 million supporting $40,000 a year has historically lasted 30 years or more. Your own result depends on returns, inflation, taxes, and lifespan.
How long will my money last if I withdraw $2,000 a month?
$2,000 a month is $24,000 a year. On $500,000 of savings, that is a 4.8% starting withdrawal rate — near the top of Fidelity’s 4% to 5% sustainable range, so it needs a careful, cautious test. On $600,000, it is exactly 4%, which is the classic 4% rule starting point. On $300,000, it is 8%, which is very unlikely to last a full retirement without other income.
Is the 4% rule still safe?
The 4% rule remains a widely used starting guideline, but it is not a guarantee, and some planners now argue for 3% to 3.5% as a more cautious starting rate given longer lifespans and lower expected bond returns. The honest answer is to treat 4% as a planning anchor, test lower returns and longer horizons, and keep flexibility to spend less in bad years.
What happens if my money runs out in retirement?
Guaranteed income does not run out: Social Security keeps paying for life, and a lifetime pension keeps paying under its terms. What runs out is the drawdown pot — savings accounts, 401(k)s, and IRAs. That is why pairing withdrawals with guaranteed income matters so much, and why a plan that relies entirely on one pot is the riskiest kind.
Does retiring later really help that much?
Yes, more than most people expect. Retiring later adds saving years, adds growth years, shortens the withdrawal period, and can increase Social Security. It is usually the single most powerful lever for someone whose calculation comes up short.
Conclusion
So, how long will my money last? The answer is yours to calculate, not guess: take your balance, subtract guaranteed income from spending to find the gap, divide to find your withdrawal rate, and test it over 30 years at a cautious return. If the rate sits near 4% to 5% and you keep flexibility for bad years, your savings have a strong chance of lasting. If it sits at 6% or above with no other income, the honest move is to change the plan now — retire a little later, spend a little less, or delay Social Security — while you still have time to make those levers count.
For deeper reading, see Fidelity’s guide to how long savings last and Vanguard’s retirement income guidance:
- Fidelity: https://www.fidelity.com/viewpoints/retirement/how-long-will-savings-last?ccsource=email_weekly
- Vanguard: https://retirementplans.vanguard.com/ekit/pmed/specialdelivery/learnMore03.html
This article is general educational information about retirement planning, not personal financial advice. Tax rules, benefit ages, and pension terms vary by country and change over time — check the current rules for your situation before making decisions.
For the accounts behind these withdrawals, see our guide to retirement accounts.
For a step-by-step look at the calculator itself, see our retirement withdrawal calculator guide.
Everyday spending also affects how long savings last — for day-to-day savings, see smart ways to save money on groceries, which covers meal planning, unit prices, and cutting food waste.