Safe Withdrawal Rate Calculator
Your safe withdrawal rate is the percentage of your portfolio you can spend each year without running out of money in retirement. The famous 4% rule says withdraw $40,000/year from a $1M portfolio — but your actual safe rate depends on your return, inflation, and time horizon.
Enter your portfolio balance, planned annual withdrawal, expected return, and inflation rate to see your withdrawal rate, how long your money lasts, and a side-by-side comparison of common withdrawal strategies.
Withdrawal Rate Comparison
| Rate | Annual $ | Monthly $ | Years Lasted |
|---|
What Is a Safe Withdrawal Rate?
A safe withdrawal rate (SWR) is the annual percentage of your portfolio you can withdraw in retirement without running out of money before you die. The concept gained mainstream attention from the Trinity Study (1998), which found that a retiree withdrawing 4% of their portfolio annually (adjusted for inflation each year) had a 95%+ chance of not outliving their savings over any 30-year period in U.S. market history from 1926 to 1995.
The math is straightforward but the implications are profound: your safe withdrawal rate determines both how much you need to save and how much you can spend in retirement. At a 4% rate, you need 25× your annual expenses. At 3%, you need 33×. At 5%, you need 20×. Choosing the right rate is one of the most consequential financial decisions you will make.
How the 4% Rule Actually Works
The 4% rule is not about withdrawing 4% of your portfolio every year. It means withdrawing 4% in year one, then increasing that dollar amount by inflation each year regardless of what the market does. So if you start at $40,000 and inflation is 3%, year two you withdraw $41,200 — even if your portfolio dropped 15%.
This inflation-adjustment is what makes it both powerful and risky. You maintain purchasing power, but you keep withdrawing even in bad markets. In the Trinity Study's simulations, portfolios with 50%–75% stocks survived this approach in nearly all historical 30-year periods. But a 100% bond portfolio failed frequently above 3%.
Is the 4% Rule Still Valid?
The original Trinity Study used U.S. data from an era of higher bond yields and strong equity growth. In the current environment, researchers have updated the analysis. Morningstar's 2023 retirement research suggested a starting rate of 3.3%–3.8% for 30-year retirements given lower projected stock and bond returns. Wade Pfau, a leading retirement researcher, recommends 3%–3.5% for newly retiring couples in their early 60s, given longer life expectancies.
The 4% rule works best as a planning benchmark, not a rigid rule. Flexible withdrawal strategies — cutting spending by 10% in down years, taking a "guardrail" approach, or delaying Social Security to maximize that guaranteed income — can allow higher withdrawal rates with acceptable failure risk. To understand why market timing in retirement matters so much, read our article on portfolio withdrawal strategies.
| Withdrawal Rate | Annual Amount | Monthly Amount | Years Lasted | Assessment |
|---|---|---|---|---|
| 3% | $30,000 | $2,500 | 50+ years | Very conservative |
| 3.5% | $35,000 | $2,917 | 50+ years | Conservative |
| 4% | $40,000 | $3,333 | ~28 years | Moderate |
| 5% | $50,000 | $4,167 | ~20 years | Aggressive |
| 6% | $60,000 | $5,000 | ~15 years | High risk |
The Portfolio Size You Actually Need
Working backwards from the 4% rule: divide your annual spending by your target withdrawal rate to find the portfolio size you need. If you plan to spend $60,000/year in retirement: at 4% you need $1,500,000; at 3.5% you need $1,714,000; at 3% you need $2,000,000. These are the amounts needed to cover spending from your portfolio alone — meaning before Social Security, a pension, or rental income is factored in. Use our retirement income gap calculator to see how your guaranteed income sources reduce the portfolio you need.
Factors That Change Your Safe Withdrawal Rate
Time horizon: A 30-year retirement needs a lower rate than a 20-year one. A 65-year-old can safely use 4%; a 50-year-old FIRE retiree facing a 45-year horizon may need 3%–3.5%. Asset allocation: Portfolios with 50%–75% equities survived best in historical simulations. 100% bonds or 100% cash typically fail above 3%. Flexibility: Retirees willing to cut spending 10% in bad years can sustain higher base withdrawal rates. Guaranteed income: Social Security and pensions create a floor that reduces withdrawal pressure on your portfolio.
To explore all your retirement withdrawal options in depth, see our guide on safe withdrawal rate strategies and how to close your retirement income gap.
Frequently Asked Questions
What is the 4% rule?
The 4% rule states that you can safely withdraw 4% of your portfolio balance in year one of retirement, then adjust that amount for inflation each year, and your money is likely to last 30 years. It originated from the Trinity Study (1998), which analyzed historical U.S. stock and bond returns from 1926–1995. A $1,000,000 portfolio = $40,000/year (or $3,333/month) using the 4% rule.
Is the 4% rule still valid in 2026?
Financial researchers debate this. In low interest rate environments and with longer life expectancies, many advisors now suggest 3%–3.5% as a more conservative target. Morningstar research has suggested a starting withdrawal rate closer to 3.3%–3.8% for 30-year retirements given today's market valuations. However, flexible withdrawal strategies can make 4%–5% work sustainably with lower failure rates.
What withdrawal rate is safest?
Research generally supports 3%–3.5% as a near-perpetual rate — meaning your portfolio is likely to survive indefinitely in most historical scenarios. The 4% rule targets a 90%+ success rate over 30 years. Rates above 5% significantly increase the risk of running out of money, especially if markets underperform in the first decade of retirement.
How do I calculate my safe withdrawal amount?
Multiply your portfolio balance by your withdrawal rate. At 4%: $750,000 × 4% = $30,000/year ($2,500/month). To find how much portfolio you need: divide your annual expenses by your chosen rate. Need $50,000/year at 4%: $50,000 ÷ 0.04 = $1,250,000 required.
What happens if I withdraw too much?
High withdrawal rates combined with poor early returns (sequence of returns risk) can cause your portfolio to spiral downward. Once you sell shares to fund withdrawals in a down market, those shares cannot participate in the recovery. This is why financial planners recommend building flexibility into your withdrawal strategy — cutting spending 10%–15% in bad years can dramatically improve long-term survival rates.
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