Safe Withdrawal Rate Calculator

How to Use the SWR Calculator

The 4% Rule and Why It Still Anchors Retirement Planning

10 Facts About Safe Withdrawal Rates

Frequently Asked Questions

• Is the 4% rule still valid?+
  For 30-year horizons with US 60/40 portfolio: yes, with the historical caveats. The original Bengen/Trinity calibration shows ~95% success rate over the 1926-2024 historical window. Modern researchers debate whether current high stock valuations + low bond yields warrant moving to 3.5%. For 40+ year horizons (early retirement before 55), 3.25-3.5% is the modern default. The 4% rule is a starting point, not gospel — combine with sequence-risk awareness + dynamic adjustments for robust retirement.
• What's the FIRE number?+
  The portfolio size needed to support your target spending at your chosen withdrawal rate. The 25× rule is the inverse of 4%: portfolio = annual spending × 25. Want USD 60K/year? Need USD 1.5M. Want USD 100K/year? Need USD 2.5M. The 25× multiplier became the FIRE community's most-quoted heuristic. For more conservative withdrawal rates: 28.6× at 3.5%, 33× at 3%.
• How does Social Security factor in?+
  The 4% rule applies to PORTFOLIO withdrawals only — Social Security, pensions, rental income, and annuity payments are separate sustainable income streams. To use the tool: enter your target spending NET of Social Security. If you spend USD 80K/year and expect USD 30K from SS, you need the portfolio to support USD 50K — which requires USD 1.25M at 4%. The right framing: SS reduces your required portfolio, often by USD 500K-USD 1M for typical retirees.
• What about taxes — is the 4% gross or net?+
  The 4% is the GROSS withdrawal from the portfolio. Taxes come out of that amount. For tax-deferred accounts (Traditional 401(k)/IRA), withdrawals are taxed as ordinary income — a 4% gross withdrawal nets ~3.0-3.5% after federal + state tax for middle-income retirees. For Roth, withdrawals are tax-free. For taxable brokerage, only the capital gains portion is taxed (15-20% federal). Realistic planning: budget your target spending as NET of all taxes, then back-solve to the gross withdrawal needed.
• What if my portfolio crashes in year 1?+
  This is "sequence-of-returns risk" — the single biggest threat to portfolio survival. Mitigations: (1) maintain 2-3 years of expenses in cash/short bonds as a "spending buffer" — sell from cash during downturns rather than equity; (2) reduce discretionary spending temporarily (Guyton-Klinger cut 10% after crash); (3) maintain part-time income for the first 5-10 years of retirement; (4) use the dynamic withdrawal model (VPW) rather than fixed-dollar inflation-adjusted. The original 4% rule survives even the worst sequences but you need stomach to stay invested through them.
• Does the 4% rule work outside the US?+
  Research by Wade Pfau and others backtested the 4% rule on 20 developed countries 1900-2010. Result: the US was an outlier on the favorable side. Many countries (Japan, Italy, Germany during 20th-century reconstructions, Australia) showed lower safe rates of 2.5-3.5%. For globally diversified portfolios anchored in US equities, the 3.5-4% range remains reasonable. For non-US-resident retirees investing in their home market alone, the safe rate is typically lower. Consider currency risk, local inflation, and bond yields when adapting to your country.
• Should I withdraw more in good years?+
  Yes — the Guyton-Klinger "decision rules" framework allows a +10% spending increase after years when the portfolio outperforms inflation by more than 4%. The "ratcheting" approach: every 5 years, if portfolio has grown >50% in real terms, raise the spending floor. The rigid Bengen 4% rule is intentionally conservative — adding dynamic adjustments captures the upside in good market regimes while protecting against bad sequences.
• What about the "Fat FIRE" vs "Lean FIRE" distinction?+
  Different lifestyle assumptions, same math. Lean FIRE: USD 25-40K/year spending → USD 625K-USD 1M portfolio. Standard FIRE: USD 50-80K → USD 1.25M-USD 2M. Fat FIRE: USD 100-200K+/year → USD 2.5M-USD 5M+. Coast FIRE: enough invested early that compounding alone will produce FIRE-number at age 65 without further contributions. The 4% rule applies to all flavors — only the spending target changes.
• Should I use the 4% rule with annuities?+
  An immediate annuity (SPIA) at age 65-70 currently pays ~5-6% annually for life — more than the 4% rule but with no inflation protection and no liquidity. A common hybrid: convert 25-50% of portfolio to a SPIA to cover non-discretionary spending (housing, healthcare); apply 4% rule to the rest for discretionary. This gives a floor of guaranteed income plus upside on the remaining portfolio. Inflation-indexed annuities exist but pay much lower starting rates.
• I'm an early retiree in my 40s — what rate should I use?+
  For 50+ year horizons (retiring at 45 with 80+ life expectancy), most modern researchers recommend 3.0-3.25%. The original Trinity Study didn't backtest 50-year windows because the historical data didn't support it. ERN's "Safe Withdrawal Rate Series" (Karsten Jeske's free 50-part deep-dive) uses Monte Carlo + historical bootstrap to argue for 3.25% as the modern default for FIRE-age retirees. Combine with explicit cash buffer, dynamic spending adjustments, and ideally some part-time income for the first decade.

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