Sequence of Returns Risk in Early Retirement, With Real Math

Two people retire with $1 million, withdraw the same $40,000 a year, and earn exactly the same returns over 45 years. One finishes with millions. The other runs out of money at 77.

The only difference is the order the returns arrived in. That's sequence of returns risk, and it's the main reason a FIRE plan that looks safe on average can still fail. This post shows the mechanism with numbers you can check, then tests the common fixes against the same bad sequence.

Why order doesn't matter until you start withdrawing

While you're saving, the order of returns doesn't change where you end up. Multiplication doesn't care about order: a −20% year followed by a +25% year leaves you exactly where a +25% year followed by a −20% year does.

Withdrawals break that. Once you sell a fixed amount every year, a loss early on forces you to sell more shares at low prices. Those shares are gone before the recovery, so they never come back. A loss late in retirement hits a portfolio that has already had decades to grow, and you have fewer years left to fund.

That's why the first five to ten years after you stop working matter far more than the rest.

The experiment: same returns, opposite order

Here's the setup, computed year by year:

• $1,000,000 portfolio at retirement, at age 45
• $40,000 withdrawn at the start of each year (4%), kept level in today's dollars
• 45 years, to age 90
• Three bad years of −20%, −12% and −8%, and 42 years of +6.5%, all after inflation

Retiree A gets the bad years first. Retiree B gets the same three years at the very end. Both sequences have the same compound annual return, 5.04%. With no withdrawals, both turn $1 million into $9,121,033 over 45 years.

With withdrawals:

Retiree A runs out of money at 77. Retiree B ends with $3.5 million, after absorbing the same three bad years at 87 to 89.

The key number is in year 3. Retiree A is down to $552,589 and still withdrawing $40,000. That's now a 7.2% withdrawal rate, and no amount of later +6.5% years can sustain it for another four decades. The portfolio never gets back to where it started.

This isn't a made-up scenario

Three bad years in a row is not an extreme assumption. According to NYU Stern's historical return data compiled by Aswath Damodaran, the S&P 500 including dividends returned −9.03% in 2000, −11.85% in 2001 and −21.97% in 2002.

Run $1 million through those three years in nominal dollars:

• With no withdrawals: $625,723
• With $40,000 taken at the start of each year: $541,969

The retiree lost 46% of their starting balance in three years, not 37%. And in real terms it was worse, since inflation was still running during those years. Anyone who retired in early 2000 began retirement at roughly the position of Retiree A in our table.

Why early retirees are more exposed

The 4% rule comes from William Bengen's 1994 study in the Journal of Financial Planning, which tested 30-year retirements against U.S. market history. (Our post on what the 4% rule does and doesn't promise covers the details.) An early retiree has three problems the original research didn't address:

1. A longer runway. At 45, you may need 45 years of withdrawals, not 30. A bad start has more years to compound against you.
2. No later safety net for years. Social Security, pensions and penalty-free account access arrive a decade or more later, so the portfolio has to carry everything in the most vulnerable years. Our guide to accessing retirement money before 59½ covers how people bridge that gap.
3. Retiring after a great run. People tend to quit after markets have done well, because that's when their portfolio crosses the line. That can mean starting withdrawals when prices are high.

None of this means early retirement fails. It means the first decade needs a plan for bad luck.

Testing the fixes on Retiree A

Here are the usual recommendations, each run against Retiree A's exact sequence. Same $1 million, same returns, same 45 years. Only the withdrawal behavior changes.

A few results stand out.

A cash buffer made things worse here. The buffer covered the first two bad years, but the third still forced a sale, and then $80,000 sat in cash earning nothing after inflation for four decades. A buffer is a timing tool, not extra money. It helps most when a slump is short and the cash earns a real yield. Against a long, grinding bear market, it mostly delays the damage.

A brief spending cut barely helped. Trimming 10% for three years saved $12,000. That bought two extra years. The problem in Retiree A's case isn't one bad year; it's a permanently smaller portfolio.

An ongoing cut works, but it isn't brief. Spending 10% less whenever the portfolio was below its starting value got Retiree A to 90. But the portfolio never recovered to $1 million, so the cut lasted 44 of the 45 years. In practice that's a lower withdrawal rate, arrived at the hard way.

The two clear winners were a lower starting rate and early income. Starting at 3.5% left $446,910 at the end. So did a modest part-time income: $20,000 a year for just the first five years did about as much as permanently spending $5,000 less. Early income works because it reduces sales at exactly the moment prices are lowest.

These are illustrations, not forecasts. Every scenario uses the same hypothetical sequence of real returns and ignores taxes and fees.

A practical playbook for the first decade

Based on how the numbers behaved, here's how we'd approach it:

1. Plan on 3.25% to 3.5% if you're retiring young, or plan to be flexible at 4%. A FIRE number of 28 to 30 times spending is more realistic for a 45-year retirement than 25 times.
2. Know which spending is optional before you need to cut. The "flexible spending" plan only works if you know how much of your budget is travel, dining and upgrades versus housing, food and insurance. Track it for a year while you're still working.
3. Keep an income option open for the first five years. Part-time work, consulting or a seasonal job is the most powerful fix in the table. If you're weighing that path, our Coast FIRE vs Barista FIRE decision math shows how part-time income changes your number.
4. Lower your fixed costs before you retire. Every fixed dollar is a dollar you can't cut in a bad year. A paid-off mortgage is one way to do that; we ran the numbers in pay off your mortgage early or invest.
5. Watch your current withdrawal rate, not just your balance. If a bad start pushes your withdrawals above roughly 5% of the portfolio, act early. Small changes in years 2 to 5 do far more than big changes in year 15.

What FIYR does and doesn't do here

FIYR's FIRE projection uses steady average returns, weighted across your linked investment accounts. It does not run historical or Monte Carlo simulations, so it won't show you a sequence like Retiree A's on its own.

What it does give you is the inputs that matter most for this decision:

• Your real spending, broken down by category, from your linked accounts. That's how you find the flexible part of your budget.
• An adjustable withdrawal rate. Change the multiplier from 25x to 28.5x and you're planning at roughly 3.5%.
• A return slider that shows a lower-return path next to your base projection, so you can see how much a weak decade moves your FIRE date.
• A Barista FIRE card where you enter part-time income and see when you could switch.

To get a quick FIRE number first, the free FIYR FIRE calculator runs in your browser with no account. Try it at a 4% and a 3.5% withdrawal rate and look at the gap. That gap is roughly what a margin of safety costs you.

Frequently asked questions

What is sequence of returns risk? It's the risk that poor returns arrive early in retirement, when you're withdrawing money. Two retirees with the same average return can end up with very different results, because early losses force you to sell more shares at low prices.

How long does sequence of returns risk last? The first five to ten years of withdrawals matter most. In our example, the same three bad years ended one retirement at 77 when they came first, while the retiree who got them at 87 still finished with $3.5 million.

Does a cash buffer protect against sequence risk? It can help with a short downturn, but it isn't a cure. In our test, two years of cash didn't cover a three-year slump, and the cash drag over 45 years made the result worse than no buffer at all.

What is a safe withdrawal rate for early retirement? There's no guaranteed number. The 4% rule was tested on 30-year retirements. For a 40- to 50-year retirement, a more cautious plan starts lower, around 3.25% to 3.5%, or pairs 4% with a willingness to cut spending or earn some income in bad years.