Sequence-of-returns risk: why timing beats averages near retirement
A retirement calculator gives you one number from one average return. Real markets don’t deliver an average — they deliver a sequence. And once you are withdrawing money, the order of good and bad years can matter more than the average itself.
The idea in one sentence
Sequence-of-returns risk is the risk that the order of your returns — not just their long-run average — damages your outcome. Two people can earn the exact same average return over the same period and end up in very different places, simply because one hit a bad stretch at the wrong time.
Why the order matters when the average is identical
If you never add or withdraw money, order doesn’t matter — a 20% gain and a 20% loss multiply to the same result whichever comes first. The moment cash flows enter, that symmetry breaks:
- In retirement (withdrawing): a market drop early on forces you to sell more shares to fund the same spending. Those shares are gone — they can’t participate in the recovery. You are “locking in” losses at the worst moment.
- While saving (contributing): the effect runs the other way — an early downturn lets you buy cheaply, which can actually help. That’s why this risk is mostly a late-career and early-retirement problem, not an early-career one.
This is exactly what a constant-return projection cannot show you. Our retirement calculator and retirement-shortfall calculator assume the same return every year — useful for seeing the shape of compounding, but silent on the order of returns. Treat their output as the smooth-path baseline, then plan for the bumps.
Two retirees, same average, opposite order
Both start retirement with $1,000,000 and withdraw $50,000 at the end of each year. Both experience the same three returns — +20%, 0%, −20% — just in opposite order. The average is identical; the endings aren't:
| Year | Retiree A (bad year first) | Retiree B (good year first) |
|---|---|---|
| 1 | −20% → $750,000 | +20% → $1,150,000 |
| 2 | 0% → $700,000 | 0% → $1,100,000 |
| 3 | +20% → $790,000 | −20% → $830,000 |
After just three years, Retiree B has $40,000 more than Retiree A — from the exact same returns and withdrawals, only reordered. Stretch this over a 30-year retirement with a real early crash and the gap isn't $40,000; it's the difference between money that lasts and money that runs out.
The “fragile decade”
The danger peaks in roughly the five years before and five years after you stop working. Two things line up badly at once: your balance is the largest it will ever be (so a percentage drop is the most dollars), and you switch from adding money to taking it out (so you can’t buy the dip — you have to sell into it). A crash at 64 can permanently shorten how long your money lasts in a way the same crash at 34 never would.
What actually reduces the risk
You can’t control the order of returns, but you can change how exposed you are to it:
- A cash/bond buffer. Holding one to three years of spending in stable assets means you can ride out a downturn without selling stocks at the bottom.
- Flexible withdrawals. Trimming spending in bad years (rather than withdrawing a fixed amount no matter what) preserves capital when it’s most fragile.
- Diversification. Assets that don’t all fall together reduce the depth of the hole you have to climb out of.
- A guaranteed-income or downside floor. Covering essential expenses with income that doesn’t depend on market timing — or holding an asset with a contractual floor — means a bad sequence can’t force you to sell at the worst time. This is the specific problem products with a downside floor are designed to address.
Frequently asked questions
- What is sequence-of-returns risk?
- The risk that the order of your returns — not just their average — hurts your outcome. Poor returns early in retirement, while you are withdrawing, do far more damage than the same poor returns later.
- Why does order matter if the average is the same?
- Because withdrawals interact with returns. Selling after a drop locks in losses and leaves less invested to recover, so identical averages in a different order produce different ending balances.
- When is it most dangerous?
- In the “fragile decade” around retirement, when your balance is largest and you begin withdrawing.
- How do I reduce it?
- A cash buffer, flexible withdrawals, diversification, and sources of guaranteed income or a downside floor so you’re never forced to sell at the bottom.