How Much Money Do I Need to Retire? The 25x Answer

Most people need about 25 times their annual spending invested to retire. Spend $60,000 a year and the target is $1.5 million. That multiple comes from the 4% rule, and it needs three honest adjustments: a pension or Social Security lowers it, retiring before 60 raises it, and your real spending decides everything.

Key takeaways

• The default answer is 25× annual spending — not 25× your salary, and not a round number someone told you at a party.
• Guaranteed income subtracts directly. Every $1,000 a month of pension or Social Security cuts $300,000 off the portfolio you need.
• Retire before 60 and the multiple grows. A 30-year retirement supports about 4%; stretch it and the safe rate falls, pushing the multiple toward 28× or higher.
• Fidelity's age guideposts answer a different question. Their 10× your salary by 67 assumes Social Security carries the rest — it is not a FIRE number.
• Your spending number is the one input that matters. Everything else is arithmetic performed on it.

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How much money do I need to retire?

How much money do you need to retire? The standard answer is 25 times your annual spending, held in a diversified portfolio of stocks and bonds. If you spend $50,000 a year, you need roughly $1,250,000; if you spend $80,000, roughly $2,000,000. The multiple comes from the 4% rule: William Bengen's 1994 study found that a retiree who withdrew 4% of their portfolio in year one and adjusted that dollar amount for inflation each year afterwards never ran out of money over a 30-year retirement, even starting at the worst moment in modern US market history. Twenty-five is simply 1 ÷ 0.04. Three things move your number away from the default: guaranteed income such as a pension or Social Security subtracts directly from what the portfolio must cover; a retirement longer than 30 years needs a lower withdrawal rate and therefore a larger multiple; and one-off costs like a mortgage payoff or healthcare sit outside the annual figure.

The spending-to-portfolio table

This is the whole calculation in one place. The left column is what you spend, not what you earn.

The right-hand column is not decoration. It's what the same lifestyle costs if you need the money to last longer than the 30 years the 4% rule was built around — more on that below.

If you don't know your annual spending to within a few thousand dollars, stop here. Every number above is your spending figure multiplied by 25, so an error in the input is multiplied by 25 too. Guess $4,000 a month when the truth is $5,000 and you've under-planned by $300,000.

Where does the 25× rule come from?

In 1994, a financial planner named William Bengen asked a narrow question: what is the highest percentage a retiree could have withdrawn in year one — then adjusted upward with inflation every year after — without running out over 30 years, even if they retired at the worst possible moment? The answer rounded to 4%, with the worst-case start being a 1968 retiree who walked straight into a decade of stagflation.

The Trinity study (Cooley, Hubbard and Walz, AAII Journal, 1998) tested the same idea across 1926–1995 data and concluded that withdrawal rates of 3% to 4% continued to produce high portfolio success rates for stock-dominated portfolios.

Flip 4% upside down and you get the shortcut everyone quotes: 1 ÷ 0.04 = 25. That's it. There is no deeper magic in the number 25. The step-by-step method — what spending to count, what to leave out, and when 25× is the wrong multiplier — is in how to calculate your FIRE number.

Two caveats people skip. First, Bengen designed 4% as a floor for the unluckiest retiree in a century, not as a typical outcome — he's since argued the realistic starting rate is higher. Second, the study assumed a rigid, inflation-adjusted withdrawal for exactly 30 years. Both assumptions matter, and I've unpacked the 2026 state of that argument in the safe withdrawal rate post.

How much do I need to retire at 55 or 60?

More — because the money has to last longer.

The 4% rule was tested over 30 years. Retire at 55 and you might be funding 40. Morningstar's 2026 research puts the base-case safe withdrawal rate at 3.9% for a 30-year retirement with 30–50% in equities and a 90% success target; stretching the horizon to 35 years drops that to 3.5%. The direction is unmistakable: longer retirement, lower safe rate, bigger multiple.

At 3.5%, the multiple becomes 1 ÷ 0.035 = 28.6×. On $60,000 of spending that's $1,714,000 rather than $1,500,000 — about $214,000 more for the same lifestyle, bought purely by retiring earlier.

Two extra things bite before 60 in the US, and neither shows up in the multiple:

Account access. Most tax-advantaged money isn't freely available until 59½. Retiring at 55 means building a bridge — taxable brokerage funds, a Roth conversion ladder, or 72(t) withdrawals — to cover the gap years.

Healthcare. Medicare starts at 65. Everything before that is on you, and it is not a rounding error.

How do pensions and Social Security change the number?

They subtract directly, and this is the single biggest correction most people are missing.

Guaranteed lifetime income replaces portfolio income one for one. So:

If you spend $60,000 a year and expect $2,000 a month of Social Security, the portfolio only has to fund $36,000 — so $900,000, not $1,500,000. That's a 40% smaller target, and it's the reason "you need $2 million to retire" headlines are wrong for a large share of people.

The catch is timing. If you retire at 62 and benefits start at 67, the portfolio has to cover the full amount for those five bridge years.

What Fidelity's age benchmarks really say

The most quoted by-age numbers come from Fidelity, and they are widely misread. Fidelity's guideline is to save 1× your income by 30, 3× by 40, 6× by 50, 8× by 60, and 10× by 67, by putting away at least 15% of pre-tax income including any employer match.

Here's the reconciliation nobody does. Ten times a $70,000 salary is $700,000 — which under the 25× rule funds about $28,000 a year of spending, not $70,000. Have Fidelity got it wrong? No. Their guideposts explicitly assume you retire at 67 and that Social Security covers most of the rest; the target is to replace at least 45% of pre-retirement income from savings. Forty-five percent of $70,000 is $31,500, which sits neatly inside the $28,000–$35,000 that $700,000 supports at a 4–5% withdrawal rate.

So the two frameworks agree — they just answer different questions. Fidelity's answers "am I on track for a normal retirement at 67 with Social Security?" The 25× rule answers "what does my portfolio need to be to cover everything, by itself, starting whenever I choose?" If you want to retire early, only the second question matters. If you want to see how your own balance compares with the wider population rather than a guidepost, net worth by age is the honest mirror.

A realistic worked example

A couple plans to spend $6,000 a month — $72,000 a year — and wants to stop working at 62. Their statements suggest $2,400 a month of combined Social Security starting at 67.

• Naive answer: $72,000 × 25 = $1,800,000
• Social Security covers $28,800 a year, so the portfolio funds $43,200
• Portfolio target: $43,200 × 25 = $1,080,000
• Bridge: five years (62 to 67) of the $28,800 the portfolio must cover early = $144,000
• Total: about $1,224,000

That's $576,000 less than the naive figure — the difference between "impossible" and "we're closer than we thought." (The bridge figure ignores any growth on that money, which makes it deliberately conservative.)

What the 25× rule quietly leaves out

One-off costs sit outside it. A roof, a car every eight years, a wedding, a mortgage payoff. Add them as lump sums on top; don't smear them into the annual spending figure.

Spending isn't flat. Most retirements are expensive early (travel, projects), cheaper in the middle, and expensive again at the end (care). A single annual number is a simplification, and it's the right one to start with — just don't mistake it for the truth.

Taxes are real. $60,000 of spending needs more than $60,000 of withdrawals if the money sits in a pre-tax account. Model spending gross, not net.

Sequence matters more than average returns. A bad first five years does far more damage than the same bad years later. That's the risk the 4% rule was built to survive — and the reason not to push the withdrawal rate just because the average return looks fine.

Find your own number

The 25× rule gets you a target in ten seconds. What it can't tell you is when you get there, or what happens if markets misbehave in year three.

For the projection, run your real numbers through our FIRE planner — it's free, no signup. If you're closer to the finish line and want the other side of the question, how long will my money last runs the drawdown instead of the build-up. And if the whole idea is new, start with what FIRE actually means or the full FIRE guide.

One last thing, and it's the part I'd most want a friend to hear. The question "how much money do I need to retire?" feels like a question about investing. It isn't. Twenty-five times your spending means the fastest way to shrink the number is to know — and then choose — what you actually spend. Cut $500 a month of spending you don't miss and you've just removed $150,000 from your target and pulled your retirement date forward by years. No portfolio decision you make will ever be that powerful.

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Questions? Email me at dennis.vymer@myfinancialfreedomtracker.com.