How Much Money Do You Need to Retire? The 25x Rule and Its Limits

Multiply the annual spending your portfolio must cover by 25. If you expect to spend $80,000 a year and Social Security will provide $35,000, your portfolio needs to cover $45,000 — so the target is roughly $1.125 million, not $2 million. The distinction between total spending and portfolio-funded spending is where most people get this wrong.

What is the 25x rule?

The 25x rule says that to retire, you need savings equal to 25 times your annual spending. It is the 4% rule stated backwards: if you can safely withdraw 4% a year, then the portfolio you need is 1 ÷ 0.04, which is 25 times that withdrawal.

The critical detail is which number you multiply. The rule applies to the spending your portfolio must cover, not your total household spending. Social Security, a pension, rental income, and any annuity all reduce the figure before you multiply.

A household spending $80,000 a year with $35,000 of Social Security needs its portfolio to produce $45,000. Multiplying $45,000 by 25 gives $1,125,000. Multiplying the full $80,000 by 25 gives $2,000,000 — a target nearly twice as large, and wrong.

What does the 25x rule assume?

Because it is the 4% rule in different clothing, it carries the same assumptions:

• A 30-year retirement. Retire at 55 and the horizon is longer than the rule was tested against.
• A diversified stock and bond portfolio, roughly balanced. A portfolio held mostly in cash will not support a 4% inflation-adjusted withdrawal for 30 years.
• Inflation-adjusted, unchanging withdrawals. The rule assumes you never cut spending in a bad year — which is precisely what makes it conservative, since most real retirees do adjust.
• Historical U.S. market returns. The research is a backtest, not a forecast.

None of this makes the rule useless. It makes it a starting point that needs your own numbers applied to it.

Do you really need 80% of your pre-retirement income?

The 80% replacement ratio is the other common shortcut: plan to spend about 80% of your final working income. The logic is that certain costs disappear at retirement — payroll taxes, retirement contributions, commuting, and work clothing among them.

It is a reasonable default when you have nothing better. But it is a population average applied to an individual, and the variation around it is enormous. A household that has paid off its mortgage may need 60%. A household planning significant travel, or one still carrying a mortgage into retirement, may need 100% or more in the early years.

How much should you have saved by each age?

Age-based benchmarks express savings as a multiple of current salary. They are useful as a progress check, not as a target:

Age	Common benchmark	On a $100,000 salary
30	1× salary	$100,000
40	3× salary	$300,000
50	6× salary	$600,000
60	8× salary	$800,000
67	10× salary	$1,000,000

Note that 10× salary at 67 is well below 25× spending for most households. The benchmarks assume Social Security carries a substantial share of retirement income, which for median earners it does. For higher earners, Social Security replaces a smaller fraction of income, so the multiple needs to be larger.

Treat a shortfall against these numbers as information rather than a verdict. Catch-up contributions exist precisely for this: from age 50 you can add $8,000 a year to a 401(k), and from 60 through 63 the catch-up rises to $11,250 — see the 2026 contribution limits.

What do these rules leave out?

Three omissions matter more than the rest.

Taxes. A $1 million traditional IRA is not $1 million of spending money. Every withdrawal is ordinary income. Depending on your bracket and state, the spendable value may be closer to $750,000. A Roth balance of the same size genuinely is worth $1 million. None of the rules of thumb distinguish between them, which is why which accounts you draw from changes the answer.

Spending is not flat. Research consistently finds a pattern: relatively high spending in the early "go-go" years, a decline through the middle years as travel and activity taper, and a rise late in life driven by healthcare and potentially long-term care. A model assuming constant inflation-adjusted spending misses all three phases.

Sequence of returns. Two retirees with identical average returns can end up in very different places depending on when the bad years arrive. A downturn in the first five years is far more damaging than the same downturn at year twenty, because withdrawals are being taken from a shrinking base. This is the reason to hold a cash reserve rather than simply trusting the average.

What should you use instead?

Use the rules of thumb to get an order of magnitude, then replace each assumption with your own figure:

• Estimate your actual retirement spending, in today's dollars, by category.
• Subtract guaranteed income — Social Security at your planned claiming age, any pension, annuity income.
• Multiply the remaining gap by 25 for a first-pass target.
• Adjust for taxes based on where your money actually sits — pre-tax, Roth, or taxable.
• Test the result against poor market sequences, not just an average return.

The last step is the one a rule of thumb cannot do, because the answer depends on the order in which returns arrive rather than their average.

Related reading. See the 4% rule and sequence of returns risk for the research behind the 25x number, Social Security claiming for the guaranteed-income side, and our income planning hub for the wider picture.