How Much Do You Need to Retire? The 4% Rule Explained
September 18, 2026
The 4% rule says you can withdraw 4% of your retirement portfolio in your first year of retirement, then adjust that dollar amount for inflation each year after, with a historically low risk of running out of money over a 30-year retirement. Working backward, that means you need about 25 times your desired annual retirement income saved.
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The rule originates from the 'Trinity Study,' which analyzed historical US stock and bond market returns to find a withdrawal rate that survived 30-year retirement periods across nearly all historical starting points, including periods with poor early returns (sequence-of-returns risk). 4% was the rate that held up across the vast majority of historical scenarios studied.
Turning the Rule Into a Target Number
If you want $50,000/year in retirement income: $50,000 / 0.04 = $1,250,000 needed. This is the same as multiplying your desired annual income by 25 (since 1/0.04 = 25), which is a common shorthand version of the rule.
Where the 4% Rule Can Break Down
The rule was calibrated to roughly 30-year retirements using a specific historical mix of US stocks and bonds — it can be too aggressive for a longer retirement (retiring at 45 instead of 65) or in a period of unusually poor early returns, and some modern researchers now suggest a more conservative 3-3.5% for extra safety margin. Treat 4% as a reasonable starting estimate, not a guarantee.
Frequently Asked Questions
What is the 4% rule?
A retirement planning guideline suggesting you can withdraw 4% of your portfolio in your first retirement year, then adjust that dollar amount for inflation annually, with historically low risk of depleting the portfolio over roughly 30 years.
How much do I need saved to retire on $60,000 a year?
Using the 4% rule: $60,000 / 0.04 = $1,500,000, or equivalently, $60,000 × 25.
Is the 4% rule guaranteed to work?
No — it's based on historical market performance and a roughly 30-year time horizon. It doesn't guarantee future results, and some planners now recommend a more conservative rate (3-3.5%) for added safety, especially for early retirees with longer time horizons.
Does the 4% rule account for Social Security or pensions?
No — the rule applies specifically to your investment portfolio. Income from Social Security, pensions, or other sources should be subtracted from your desired total income before applying the 4% calculation to the remaining amount your portfolio needs to cover.
Should I withdraw exactly 4% every single year regardless of market performance?
The classic version adjusts only for inflation, not market performance, but many retirees use more flexible approaches (spending less in down years) to reduce risk — the 4% rule is a planning starting point, not a rigid rule to follow mechanically.