Two people retire with the same portfolio, the same withdrawal rate, and the same average annual return over their retirement. One dies with millions in the bank. The other goes broke. The only difference between them is the order in which their returns arrived. That is sequence-of-returns risk, and it is the single most underrated danger in early retirement planning.
The same average, two very different outcomes
Averages hide what actually decides whether your money lasts. Consider two retirees, Anna and Marco. Each starts with €1,000,000, withdraws €40,000 in the first year, and raises that withdrawal by 2% each year for inflation. Each one earns an average of 5% per year over the period. The difference is sequence: Anna hits a brutal stretch early, Marco hits the same brutal stretch late.
Imagine the market delivers these annual returns in some order: three sharp down years around -15%, then a long run of good years near +12%. The returns are identical for both people. Only the order flips.
- Anna retires straight into the downturn. In year one her portfolio drops to roughly €810,000 before she even finishes withdrawing, and she is selling €40,000 of a shrinking pot to live. By the time the good years arrive, she has far fewer shares left to ride the recovery. The early losses are locked in permanently because she converted paper losses into realized ones by spending them.
- Marco gets the good years first. His portfolio grows to well over €1,300,000 before the downturn ever touches him. When the same -15% years finally hit, they land on a much larger base that has already banked years of growth, and his withdrawals are a smaller slice of a bigger pie. He sails through and dies wealthy.
Same starting capital. Same withdrawals. Same average return. Anna runs out of money in her early eighties; Marco leaves a seven-figure estate. The math is not a trick. It is what happens when withdrawals and a falling market collide in the same few years.
Why accumulation barely cares, and retirement cares enormously
During your working years, when you are adding money rather than taking it out, the order of returns almost does not matter. A crash early in your career is a gift: you keep buying shares cheaply, and your final balance depends mostly on the average return and how long you stayed invested. Two savers with the same average return over 25 years end up in nearly the same place regardless of sequence.
Retirement inverts this. Once you are selling assets every year to fund your life, a crash in the first few years forces you to sell more shares at depressed prices to raise the same €40,000. Those shares are gone. They cannot participate in the recovery. A poor first decade is what breaks an otherwise sound plan, which is why the danger concentrates in the years right around your retirement date. Get through the first five to ten years intact and the risk fades fast.
This is also why a static 4% rule can feel safe on a spreadsheet yet fail in practice. The rule is built around surviving bad sequences, but it assumes you hold your nerve and your spending steady through them. Understanding your real safe withdrawal rate means stress-testing it against the worst orderings, not just the average.
How to defend against a bad sequence
You cannot control the order the market hands you, but you can build a plan that survives a bad one. The defenses stack, and you do not need all of them.
- Hold a cash and bond buffer. One to three years of spending in cash and short-dated bonds lets you cover withdrawals from that buffer during a downturn instead of selling equities at the bottom. You refill it from stocks in good years. This is the most direct counter to sequence risk because it breaks the link between a falling market and forced selling.
- Spend flexibly with guardrails. Plans that cut discretionary spending by 10% to 20% after a bad year, and raise it again after good years, last dramatically longer than rigid ones. Skipping one big trip and trimming spending in a crash year removes most of the damage.
- Start with a slightly lower withdrawal rate. Beginning at 3.25% to 3.5% rather than 4% gives you a wide margin. The first few years are when that margin matters most, and you can ratchet spending up later if the early sequence is kind.
- Do not retire at an obvious peak. Retiring with a 100% equity portfolio right after a long bull run is the highest-risk moment there is. Holding more bonds and cash in the years on either side of your retirement date, then drifting back toward equities later, directly addresses the window where you are most exposed.
- Keep some earned income early. Even modest part-time work in the first years covers part of your spending, so you withdraw less while the portfolio is most vulnerable. This is the core logic of Barista FIRE, and it doubles as insurance against a bad opening decade.
The European angle: tax drag on every withdrawal
Sequence risk gets worse in Europe because of how withdrawals are taxed. In a bad early year you may need to sell more to net the same spendable amount once capital gains tax is taken out, which deepens the hole exactly when you can least afford it. The headline rate varies by country: Spain taxes savings income progressively up to 28%, Belgium has historically been gentle on long-held gains, and several countries apply wealth taxes that drain the portfolio regardless of whether you sold anything.
A few practical consequences for European retirees:
- Hold your cash buffer in the most tax-efficient wrapper you have, so drawing it down in a crash year triggers little or no tax.
- Sequence your withdrawals across account types to keep your taxable gains low in down years, realizing more in years when the portfolio is healthy.
- Build the expected tax drag into your withdrawal rate from the start. A 4% gross withdrawal can be a 4.8% effective drain on the portfolio once tax is paid, which materially shortens how long the money lasts.
If you want to see how different orderings and withdrawal rates play out against your own numbers, run them through a FIRE calculator. The point of planning for sequence risk is not pessimism. It is making sure your financial independence survives the one variable you cannot predict and cannot control: which decade the market decides to be cruel.
