Retirement & Planning · 6 min read

Retirement Drawdown: Why the Order of Returns Matters as Much as the Average

Building a corpus is half the plan — spending it down without running out is the other half, and it's not symmetrical.

Accumulation vs. drawdown are different problems

While you're building a corpus, a market downturn is actually fine — you're buying more units at lower prices, and you have years for it to recover. Once you're withdrawing from that corpus regularly, a downturn is a completely different problem: you're forced to sell more units at the depressed price just to fund the same withdrawal amount, permanently reducing what's left to recover with.

Sequence-of-returns risk

Two retirees with the identical average return over 20 years can end up with very different outcomes purely based on WHEN the bad years happened. A downturn in the first few years of retirement does far more permanent damage than the identical downturn happening near the end, because early withdrawals during a downturn lock in losses that never get to recover. This is called sequence-of-returns risk, and it's why an 'average case' projection alone is a dangerously incomplete way to plan a drawdown.

Why this argues for stress-testing, not just averaging

A responsible drawdown plan checks what happens under a bad-early-years scenario specifically, not just the average or 'expected' case — because retirement is a single, unrepeatable sequence of actual years, not an average you get to experience.

Worked example — Same average return, different order

Retiree A gets +15%, +15%, −20% in their first three retirement years. Retiree B gets the same three numbers in reverse: −20%, +15%, +15%. The average return is identical for both. But Retiree A withdrew through the good years while the corpus was largest, then hit the downturn on a corpus that had already paid out less; Retiree B was forced to withdraw during the −20% year while the corpus was still at its starting size, permanently locking in a bigger loss relative to what remained. Same average, meaningfully different outcomes.

Common mistakes

Planning retirement drawdown around a single average-return projection instead of stress-testing an early-downturn scenario.
Withdrawing a fixed percentage every year regardless of market conditions, instead of flexing spending down slightly after a bad year.
Assuming the accumulation-phase mindset ('downturns are buying opportunities') still applies once you're withdrawing, not contributing.

Frequently asked questions

Why does the order of returns matter in retirement drawdown?

Two retirees with identical average returns over 20 years can end up with very different outcomes depending on when the bad years happened — a downturn early in retirement forces selling more units at a depressed price, permanently reducing what's left to recover with.

What is sequence-of-returns risk?

It's the risk that the specific order your returns arrive in — not just their average — determines how a retirement corpus survives, because withdrawals during a downturn lock in losses that never get to recover.