Sequence of Returns Risk, Explained Simply

Updated June 2026 · 6 min read

Here's the uncomfortable truth the 4% rule was built to handle: two people can retire with the same portfolio, earn the exact same average return over their retirement, and one runs out of money while the other dies rich. The only difference between them is the order the good and bad years arrived. That's sequence of returns risk, and for early retirees it's the single biggest threat to the plan.

Why the order matters when it didn't before

While you're still working and saving, the order of returns barely matters. A crash early in your career is almost a gift, because you're buying cheap shares for decades afterward, and the long-run average is what counts. Nobody panics about a downturn at 30.

Retirement flips that. Once you stop adding money and start pulling it out, a bad year early does permanent damage. You're selling shares to live on while prices are down, which locks in the loss and leaves fewer shares to recover when the market eventually climbs. The same crash that helped you at 30 can sink you at 50.

A worked example

Two retirees, both start with $1,000,000 and withdraw $50,000 at the end of each year. Over ten years they get the exact same set of returns, averaging 5.6% a year. The only difference: Retiree A hits the bad years first, Retiree B hits them last.

Same starting balance. Same withdrawals. Same average return. A gap of over $400,000 after just ten years, built entirely from which years happened to land first. Stretch that over a 30 or 40-year early retirement and the difference is the line between comfortable and broke.

What you can actually do about it

You can't control the order of returns, but you can blunt the damage. A few approaches that genuinely help:

• Hold a cash buffer. One to three years of expenses in cash means you can stop selling shares during a crash and spend the buffer instead, giving the portfolio time to recover.
• Stay flexible on spending. Skipping the inflation raise or trimming discretionary costs in a down year removes most of the worst-case scenarios. Flexibility is worth more than any single percentage point on your withdrawal rate.
• Start with a lower withdrawal rate. Early retirees often begin at 3.25% to 3.5% instead of 4%, precisely because a longer retirement gives bad sequences more chances to do damage.
• Keep some earning ability. Even a little income in the first few years means you withdraw less while prices are down.

The takeaway

Sequence risk is why "my average return will be 7%" isn't enough to plan a retirement on. The average can be fine and the path still ruin you if the worst years cluster at the start. Build the plan so it survives a bad first decade, and the good decades take care of themselves. Testing your withdrawal rate against real historical sequences is the most honest way to see whether your number holds up.