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Your safe withdrawal rate is not 4%. It is a number unique to your portfolio, your age, your income, and your goals. Enter your details below to find yours.
Your safe withdrawal rate (SWR) is the percentage of your retirement portfolio you can withdraw each year while maintaining a high probability that your money lasts your entire retirement. Withdraw too much and you risk running out in your 80s. Withdraw too little and you shortchange yourself during the years you are healthiest and most active.
The concept was formalized in 1994 by financial planner William Bengen, who studied every 30-year retirement period in U.S. history going back to 1926. He found that a 4% initial withdrawal rate, adjusted for inflation each year, survived even the worst historical periods. His work was later confirmed and expanded by the Trinity Study (1998), conducted by three professors at Trinity University, which tested various withdrawal rates against different portfolio allocations.
These studies were groundbreaking, but they had limitations. They used only U.S. historical data, assumed a fixed 30-year retirement, and did not account for the specific market conditions at the time of retirement. A retiree starting in 2026 faces a very different landscape than one who started in 1994: stock valuations are higher, bond yields are lower, and many people need their money to last well beyond 30 years.
The Key Insight
Your safe withdrawal rate is not a universal constant. It is a personal number that depends on when you retire, what you own, how long you need the money to last, and what other income you have. A one-size-fits-all rule will either leave money on the table or put you at risk.
Several variables interact to determine your personalized safe withdrawal rate. Understanding them helps you interpret your calculator results and make smarter decisions.
This is the factor most people overlook. When stock market valuations are high (as measured by the CAPE ratio or price-to-earnings ratio), expected future returns tend to be lower. Retiring during a period of elevated valuations, like the current market environment, means your portfolio is statistically more likely to deliver below-average returns in the critical early years. Our calculator incorporates current 2026 valuations into its analysis, which is why it may suggest a rate below the traditional 4%.
Your mix of stocks, bonds, and other assets changes both the expected return and the volatility of your portfolio. A heavier stock allocation has historically supported higher SWRs over long periods because of superior long-term growth, but it also means more dramatic short-term swings. A bond-heavy portfolio is more stable year-to-year but may struggle to keep up with inflation over decades. Most research points to a 50-75% stock allocation as optimal for retirement withdrawals.
A 30-year retirement and a 40-year retirement require very different withdrawal rates. Bengen's original 4% finding was for 30 years. If you retire at 55 and plan for age 95, you need your money to last 40 years, which typically requires a rate 0.5-1% lower. Conversely, if you retire at 70, a 25-year horizon may allow a rate above 4%.
Social Security, pensions, and annuities reduce the amount you need from your portfolio. If Social Security covers 40% of your expenses, your portfolio only needs to cover the remaining 60%. This effectively lowers the strain on your investments and can raise your safe withdrawal rate from the portfolio by a meaningful amount.
Getting the most out of the calculator requires accurate inputs. Here is what to gather before you start:
The calculator runs your inputs through thousands of simulated market scenarios calibrated to current conditions and returns the withdrawal rate that succeeds in 90%+ of them. It also shows you the corresponding monthly dollar amount so you have a tangible number to plan around.
To learn more about the methodology behind safe withdrawal rates, read our detailed guide: What is a safe withdrawal rate? You can also explore how the 4% rule fits into the broader picture at our 4% rule calculator, or get a different perspective with our retirement withdrawal calculator focused on dollar amounts rather than percentages.
For context on why static rules may not serve you well, see why the 4% rule may be outdated.
A safe withdrawal rate (SWR) is the percentage of your retirement portfolio you can withdraw each year with a high probability of not running out of money. For example, a 3.5% SWR on a $1 million portfolio means withdrawing $35,000 in the first year, then adjusting that amount for inflation each subsequent year. The "safe" part means the rate has been tested against a wide range of historical and simulated market conditions.
There is no single right answer, but research calibrated to 2026 market conditions suggests 3.3% to 3.8% for a standard 30-year retirement with a balanced portfolio. If you have significant Social Security income or can reduce spending during downturns, your rate can be somewhat higher. Early retirees planning for 40+ years should consider rates closer to 3.0-3.3%. Use the calculator above for a number that reflects your actual situation.
The 4% rule is one specific SWR recommendation based on William Bengen's 1994 study of U.S. historical returns from 1926 to 1992. A personalized SWR goes beyond this by incorporating your specific asset allocation, current market valuations, your planned retirement length, other income, and your spending flexibility. Think of the 4% rule as a rough benchmark and your personal SWR as the number that actually applies to you.
Absolutely. Your SWR is not a number you set once and forget. If your portfolio grows well in the early years, you can safely withdraw more. If markets decline sharply, temporarily reducing withdrawals protects your long-term plan. As you age, your remaining time horizon shrinks, which generally supports a higher rate. This is the principle behind dynamic withdrawal strategies, which research consistently shows outperform static approaches.
Markets shift. Your needs evolve. RetireFree recalculates your safe withdrawal rate every month based on actual portfolio performance and current conditions. Sign up free and stay informed.
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