The 4% Rule in 2026: Does It Still Work?

Quick Answer

The 4% rule says you can withdraw 4% of your portfolio in year one ($40,000 per $1 million), then increase withdrawals by inflation annually, and your money will last 30+ years with 90%+ success rate. In 2026, the rule still holds, but some experts argue for 3%–3.5% given low interest rates and high valuations. The rule assumes a 60/40 stock/bond portfolio, 30+ year horizon, and stable spending.

Historical Origins of the 4% Rule

The 4% rule comes from a 1994 study by William Bengen, who analyzed historical returns from 1926–1992. He found that a 4% withdrawal rate adjusted for inflation had a 95% success rate of not depleting a portfolio over 30 years.

Since then, researchers have refined the rule, but 4% remains the standard benchmark.

How the 4% Rule Works

Year 1: Withdraw 4% of your starting portfolio balance.

Example: Starting portfolio $1,000,000.

• Year 1 withdrawal: $1,000,000 × 4% = $40,000
• Year 2 withdrawal (assuming 2.5% inflation): $40,000 × 1.025 = $41,000
• Year 3 withdrawal: $41,000 × 1.025 = $42,025
• (And so on, increasing by inflation each year.)

The portfolio itself continues to earn investment returns (say 8% average). The withdrawal reduces the balance, but growth can compensate, keeping the portfolio stable or growing over time.

Portfolio balance tracking (assuming 8% annual return, 2.5% inflation, 4% initial withdrawal):

The portfolio is growing despite withdrawals. Even after 30 years of withdrawals, the portfolio may have grown or maintained its value.

Success Rate and Market Conditions

The 4% rule has a historical success rate of 95% (only 1 in 20 simulations failed to last 30 years). However, this depends on:

1. Market returns: Historical average 8–10% annually. If future returns are lower (say 6%), success rate drops.
2. Inflation: 2–3% historical. Higher inflation (5%+) stresses the portfolio.
3. Portfolio allocation: The rule assumes 60% stocks, 40% bonds. All-stock portfolios are riskier; all-bond are safer but lower-returning.
4. Time horizon: 30 years. Needing the portfolio for 40+ years increases failure risk.

Current Debate: Is 4% Too High?

Some argue the 4% rule is outdated:

Concerns:

• Low interest rates (2024–2026): Bond yields are 4–5%, down from 6%+ historically. Lower yields mean lower portfolio returns.
• High stock valuations: Price-to-earnings ratios are elevated, suggesting lower future returns.
• Longer lifespans: People live longer now (to 95+), extending the withdrawal period.
• Inflation: Recent inflation (2021–2024) was 4%+, stressing withdrawals.

Counter-arguments:

• Historical data still applies: Even in the worst periods (Great Depression, financial crisis), the 4% rule succeeded in most cases.
• Flexibility: The rule allows reducing withdrawals in bad markets (e.g., withdraw 3% in down years). This improves success rates significantly.
• Dividends and interest: A diversified portfolio generates income, reducing reliance on capital appreciation.

Adjusted Withdrawal Rates for 2026

Conservative advisors recommend:

• 3.5% rule: Safer, 99% success rate for 30-year retirement.
• 3% rule: Very conservative, 100% success rate even for 40-year retirement.
• 4% rule: Historical recommendation, 95% success rate.

For a $1,000,000 portfolio:

• 3% withdrawal = $30,000/year
• 3.5% withdrawal = $35,000/year
• 4% withdrawal = $40,000/year

The difference is $5,000–$10,000/year in retirement income.

Choose based on your:

• Life expectancy (live longer? Use 3%).
• Portfolio size (small portfolio? Use 3%).
• Flexibility (willing to cut spending in recessions? Use 4%).
• Other income (Social Security, pension? More flexible, use 4%).

Dynamic Withdrawal Strategies

Instead of a fixed 4% + inflation, some retirees use dynamic withdrawal strategies:

Guardrails strategy: Set a floor and ceiling for your portfolio.

• If portfolio grows to 120% of initial value: Increase spending by 5%.
• If portfolio falls to 80% of initial value: Decrease spending by 5%.

This maintains the portfolio within a "guardrail" while allowing flexibility.

Example: Started with $1,000,000. Guardrails: $800,000–$1,200,000.

• Year 5: Portfolio is $1,250,000 (above ceiling). Increase withdrawals by 5%.
• Year 8: Portfolio falls to $750,000 (below floor). Decrease withdrawals by 5%.

This approach reduces the risk of running out of money and adjusts for market conditions.

Longevity and the 4% Rule

30-year retirement (age 65–95): The 4% rule is designed for this. 95% success rate.

40-year retirement (age 55–95): 4% rule has ~85% success rate. Consider 3.5% instead.

Very early retirement (age 40): 4% rule may not apply. Consider 2.5–3% withdrawal rate.

Use the /products/fire-calculator tool to model your specific retirement timeline.

Adjustments for Social Security and Pensions

The 4% rule applies to portfolio withdrawals, not total retirement income. If you have:

• Social Security: $30,000/year
• Pension: $20,000/year
• Total: $50,000/year guaranteed

You only need your portfolio to generate the gap between your spending and these guaranteed sources.

Example: Spending $80,000/year.

• Social Security + pension: $50,000
• Gap: $30,000
• Portfolio needed (4% rule): $30,000 / 4% = $750,000

Without guaranteed income sources, you'd need $2,000,000 (80,000 / 4%) to sustain the same spending.

Market Volatility and the 4% Rule

The 4% rule can struggle in "sequence of returns risk" scenarios where bad markets hit early in retirement.

Example: Retire in 2020 (pandemic crash), then recovery. vs. Retire in 2010 (post-crisis recovery).

Both retire with $1,000,000, both use 4% rule. But the 2020 retiree experiences a portfolio decline immediately, while the 2010 retiree enjoys gains. Over 30 years, the 2020 retiree may face a higher failure risk.

Mitigation:

• Keep 1–2 years of expenses in cash (to avoid selling during downturns).
• Use a dynamic withdrawal strategy (reduce spending in bad markets).
• Diversify internationally (reduced correlation with U.S. markets).

Tax Considerations

The 4% withdrawal is pre-tax. Tax varies by account type:

• Traditional IRA/401(k): Withdrawals are fully taxable.
• Roth IRA: Withdrawals are tax-free.
• Taxable brokerage: Capital gains taxed (15–20%), dividend income (15–20%), principal tax-free.

Tax-efficient withdrawal sequence (from earlier context):

1. Taxable account (capital gains taxes only).
2. Traditional account (ordinary income tax).
3. Roth (tax-free).

This minimizes lifetime tax burden.

Checklist Before Using 4% Rule

1. Portfolio size: Do you have enough? ($1M for $40k/year? $2M for $80k/year?)
2. Time horizon: 30+ years? (If not, use 3% or lower.)
3. Other income: Social Security, pension, rental income? (Reduces portfolio need.)
4. Flexibility: Willing to cut spending 5–10% in bad market years?
5. Asset allocation: 60/40 stocks/bonds? (All stocks is riskier; all bonds is safer but lower-returning.)
6. Inflation: Expect inflation adjustments annually? (Yes, the rule assumes this.)

Sources

• William Bengen. "The Trinity Study: Sustainable Withdrawal Rates for Retirement." Journal of Financial Planning, 1994.
• Vanguard. "Updating the 4% Rule for Evolving Markets." Vanguard Research, 2021.
• Kitces, Michael. "The 4% Rule and Its Critics." Nerd's Eye View, 2024.
• Morningstar. "Safe Withdrawal Rates and Asset Allocation." Morningstar Research, 2023.
• CFA Institute. "Retirement Income Withdrawal Strategies."