While you are contributing, the order of your returns barely matters — only the destination does. The moment you start withdrawing, order becomes one of the most important variables in your financial life.

The same average, opposite outcomes

Imagine two retirees, both withdrawing a fixed amount each year, both experiencing exactly the same set of annual returns over twenty years — but in reverse order to each other. Their average return is identical. Their outcomes are not remotely.

The one who hits a severe crash in years one to three sells a large number of units at depressed prices to fund living costs. Those units are gone; they cannot participate in the recovery. The other retiree meets the same crash at year eighteen, by which point the portfolio has grown enough that the withdrawals barely dent it.

Averages describe the market. They do not describe the experience of anyone withdrawing from it.

Why withdrawals invert the logic

Contributing during a crash is good — you buy more units cheaply. Withdrawing during a crash is the mirror image: you are forced to sell more units to raise the same cash. The mechanism that helps accumulators harms retirees, which is why the years immediately before and after you stop working carry outsized weight. This window is sometimes called the retirement red zone.

What actually helps

  • A cash buffer. One to three years of spending in cash means a bad market does not force you to sell anything. This is the single most effective defence.
  • Flexible withdrawals. Cutting spending modestly in bad years dramatically improves survival odds. Rigid inflation-adjusted withdrawals are the fragile case.
  • Glide down the risk before you stop. Reducing equity exposure approaching retirement, then letting it drift back up, addresses the red zone specifically.
  • Income floors. A pension or annuity covering essential costs means market falls threaten your holidays, not your heating.

What does not help

Assuming average returns. Every "your money lasts 32 years" projection — including our drawdown calculator — assumes a steady return each year. Reality delivers the same average in a random order, and that order decides your result. Treat any smooth projection as the optimistic centre of a wide range.

Summary

In accumulation, order is noise. In drawdown, order is the risk. Hold cash for the near years, stay flexible on spending, and be sceptical of any plan that only works if returns arrive politely.