Sequence-of-Returns Risk: Same Returns, Different Retirement Outcomes

When you withdraw from a portfolio, the order of returns matters. An early loss can force more capital out before a later recovery arrives.

By Steven, Founder · Published November 4, 2026 · Updated November 4, 2026

Short answer

Identical compounded investment returns can produce different balances when withdrawals occur between them.
Average returns alone cannot establish a sustainable retirement draw.
Test an explicit spending response and reserve policy instead of assuming either eliminates risk.

First remove withdrawals to see the control case

Start with $100,000 and two annual returns: −20% and +25%. Without contributions or withdrawals, either order ends at $100,000 because 0.80 × 1.25 = 1. The arithmetic average is +2.5%, but the compounded return across the two years is zero. Those are already different summaries of the same data.

Now add the cash flow a retiree actually needs. Withdraw $10,000 at the beginning of each year. There is no inflation, tax or fee in this short illustration, so return order is the only changing input. This isolates the mechanism rather than pretending two years predict a whole retirement.

Loss first leaves $4,500 less

With the loss first: ($100,000 − $10,000) × 0.80 = $72,000 after year one. Then ($72,000 − $10,000) × 1.25 = $77,500 after year two. With the gain first: ($100,000 − $10,000) × 1.25 = $112,500, followed by ($112,500 − $10,000) × 0.80 = $82,000.

The difference is $4,500, despite identical spending and the same pair of returns. The second withdrawal removes a larger share of the depressed portfolio in the loss-first case. The later gain multiplies a smaller remaining base. Reversing the sequence would not have mattered without the withdrawals.

Inflation can make the cash-flow problem harder

If essential costs rise after an early loss, maintaining the same purchasing power requires withdrawing more dollars. A nominal recovery can therefore coexist with a weaker real spending position. Bengen's historical withdrawal research examined returns alongside inflation, including periods when both falling markets and rising prices harmed retirees.

A fixed-return withdrawal calculator is useful for understanding the spending gap and horizon, but its smooth path is not evidence that this ordering risk is absent. When comparing projections, ask whether they replay historical sequences, simulate paths or simply repeat an assumed annual rate.

Separate a reserve from a return forecast

A cash reserve can fund spending without selling stocks immediately after a decline. It also changes the overall asset mix and must eventually be refilled. If a comparison adds cash to one strategy without subtracting it from the rest of the portfolio, it has given that strategy extra starting wealth rather than demonstrated protection.

Spending flexibility is another lever, but specify it. Deferring a $10,000 trip is measurable; assuming you will 'spend less if needed' is not. Include the reduction's start, duration and effect on quality of life. A temporary cut and a permanent cut do not have the same financial result.

Compare the same plan across unfavorable starts

Keep starting assets, allocation, fees and spending identical when testing sequences. Examine the early years, not just the ending median balance. Ask whether an unfavorable path requires a spending cut you would actually accept, and whether later guaranteed income can reduce the draw.

The historical-versus-Monte-Carlo guide explains the methods, and the sample demo shows the household planning context. A simulated success rate is conditional on assumptions; this educational example is not an investment forecast or allocation recommendation.

Same returns, reversed

Starting assets: $100,000
Beginning-year withdrawals: $10,000 each year
Returns: −20%, +25%, or the reverse

$77,500 loss-first; $82,000 gain-first

Without withdrawals both orders end at $100,000. With withdrawals, reversing the same two returns changes the ending balance by $4,500.

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Methodology

See how Meridary checks calculator figures, tests the planning engine, states model limits, and records corrections on the validation methodology page.

Sources

Determining Withdrawal Rates Using Historical Data (1994; 2004 reprint) — William P. Bengen, Journal of Financial Planning / Financial Planning Association
Historical U.S. stock/Treasury retirement tests, initial-balance withdrawal percentages followed by inflation adjustments, rebalancing, and the inadequacy of average returns for drawdown planning.
Accessed October 25, 2026

This is an educational estimate, not tax or financial advice. Figures reflect the law year shown and the inputs you provide. Consult a qualified professional before acting.