Free safe withdrawal rate calculator. Find the maximum initial withdrawal rate with 90%+ success over your retirement horizon. Adjust for time horizon, stock allocation, and success threshold.
The Safe Withdrawal Rate (SWR) Calculator helps you find the maximum initial withdrawal rate from your retirement portfolio that maintains a high probability of lasting your entire retirement. Unlike the fixed 4% rule, this calculator lets you adjust the success threshold, time horizon, and expected returns to find a rate personalized to your situation.
The calculator simulates your portfolio over your chosen retirement duration, accounting for inflation-adjusted withdrawals and varying return assumptions, to show which withdrawal rates are sustainable and which risk portfolio depletion.
Customize the assumptions to match your risk tolerance and retirement timeline. A retiree at 55 with a 45-year horizon may need a safe withdrawal rate of just 3.0 to 3.3 percent to maintain a 95% success probability, while someone retiring at 65 with a 25-year outlook might safely withdraw 4.5 percent or more. These differences can translate to tens of thousands of dollars per year in available retirement spending. This calculator runs the simulation across your specific parameters so you can set a withdrawal rate grounded in data rather than a one-size-fits-all rule.
The 4% rule is one-size-fits-all. Your retirement may last 20 years or 50 years, you may want 90% confidence or 99%, and your portfolio allocation matters. This calculator personalizes the analysis so you can find the withdrawal rate that fits your specific needs. Knowing your precise sustainable rate gives you permission to spend confidently without the constant fear of running out.
For each withdrawal rate, simulate N-year periods: Year t Balance = Prior Balance × (1 + return) − Inflation-Adjusted Withdrawal Success = Balance > 0 at end of horizon Safe Withdrawal Rate = Highest rate with ≥ target success probability
Result: Safe Withdrawal Rate: ~4.0% ($40,000/year)
With a 7% average return, 12% volatility, and 3% inflation over 30 years, a 4% initial withdrawal rate has approximately a 92% historical success rate. Lowering to 3.5% raises success to near 97%.
When we say a withdrawal rate has a 95% success rate, it means that in 95 out of 100 historical 30-year periods, the portfolio would have survived. The remaining 5% ran out of money, typically due to poor early returns (like retiring in 1966 or 2000). A higher success threshold requires a lower withdrawal rate.
Counter-intuitively, a 100% bond portfolio has a lower SWR than a balanced portfolio over long periods because bonds lack the growth to keep up with inflation-adjusted withdrawals. A 50-75% stock allocation has historically produced the highest SWR for 30-year periods, balancing growth with manageable volatility.
Static SWR analysis assumes you never change your withdrawal amount (except for inflation). In reality, most retirees can and should adjust. Spending less in bear markets and more in bull markets (guardrail strategies) can raise the effective SWR by 0.5-1.0% while reducing the risk of depletion.
The safe withdrawal rate (SWR) is the maximum percentage of your portfolio you can withdraw in year one (then adjust for inflation) with a high probability of the portfolio lasting your entire retirement. It depends on time horizon, asset allocation, and your acceptable risk level.
Higher volatility increases the chance of large early losses (sequence-of-returns risk), which can permanently damage a portfolio in withdrawal mode. Higher stock allocations have higher expected returns but also higher volatility. A balanced approach often produces the best risk-adjusted SWR.
Most planners recommend 90-95% as a reasonable success threshold. 100% is possible only at very low withdrawal rates. Some argue 80-85% is acceptable if you're willing to adjust spending in bad scenarios. Your comfort level and flexibility determine the right target.
Yes. Research shows that starting withdrawals when stock valuations are high (high CAPE ratio) reduces the SWR. In overvalued markets, a more conservative 3-3.5% may be prudent. In undervalued markets, 4-4.5% may be safe.
The 4% rule is a specific SWR recommendation based on a 30-year horizon with a ~95% success rate and a balanced portfolio. This calculator lets you find the SWR for any combination of horizon, success threshold, and return assumptions — making it more flexible and personalized.
This calculator uses nominal returns and subtracts inflation separately. If you input real (after-inflation) returns, set the inflation field to 0%. The result is the same either way — just be consistent.