Sequence of Returns Risk Explained

Imagine two people who retire with an identical pension pot, invest in exactly the same way, and enjoy exactly the same average return over thirty years. Common sense says they should end up in the same place. They may not, one can run out of money while the other dies wealthy. The difference is the order in which their returns arrived, and it is one of the most important and least understood risks in retirement.

This is sequence of returns risk, and it is the quiet reason drawdown is harder than saving. While you are building a pension, a market crash can even be a gift, you buy in cheaply. Once you are drawing an income, the same crash can be corrosive, because you are selling rather than buying. This guide explains why the sequence matters so much, and the practical ways to defend against it. It is information, not personal advice, and investments can fall as well as rise.

What sequence risk is

Sequence of returns risk is the danger that the timing of good and bad investment years, rather than their average, determines whether your money lasts. Two portfolios can post the same average annual return over a retirement and yet leave you in completely different positions, purely because one suffered its worst years early and the other suffered them late. When you are taking a regular income, early losses are punishing in a way that no long-run average can undo.

The mechanism is simple but ruthless. To fund a fixed income when prices have fallen, you must sell more units of your investments, cashing them in cheaply. Those units are then gone, so they cannot participate in the recovery when markets rebound. A pot that takes an early hit is therefore permanently smaller than the average return alone would suggest, and it is trying to support the same withdrawals for the same number of years. This is why anyone using pension drawdown needs to understand it before they start.

A quick illustration makes it vivid. Picture two retirees who each average 5% a year over the whole of their retirement. The first enjoys a run of strong early years and only meets a serious downturn much later; by then their pot has grown, so the falls bite a larger, already-swollen balance and there is plenty left to recover. The second meets the downturn immediately, drawing income from a shrinking pot at the very moment it can least afford it. Same average, same withdrawals, wildly different endings, and the only variable that changed was the timing.

Why the order matters

It helps to see the two phases of investing side by side. During the years you are contributing, sequence risk works in your favour or barely matters, because regular saving means a market fall lets you buy more cheaply, the essence of pound-cost averaging. During the years you are withdrawing, the same dynamic reverses and works against you.

This is why the familiar reassurance that ‘markets always recover in the long run’ is only half true for a retiree. Markets may indeed recover, but if you have been selling units to fund income throughout the downturn, you recover with far fewer units than you started with. The average return survived; your capital did not.

The distinction matters because so much conventional investing wisdom is written for savers rather than spenders. ‘Stay the course’, ‘buy the dip’, ‘time in the market beats timing the market’, all sound advice while you are accumulating, and all quietly assume you are adding money rather than taking it out. Retirement flips the incentive on its head, and a strategy that served you brilliantly through thirty years of saving can need real adjustment on the day you start drawing an income from it.

The retirement danger zone

Researchers often describe the years immediately before and after you stop work as the ‘retirement red zone’ or danger zone, roughly the five years either side of the day you begin drawing an income. This is when your pot is typically at its largest and you have the least time to recover from a shock, so a poor market at exactly this moment can shape the entire retirement that follows.

The much-quoted ‘4% rule’, the idea that withdrawing around 4% of your pot in the first year, then rising with inflation, has historically lasted around 30 years, exists precisely because of sequence risk. It is a rule of thumb, not a guarantee, and it was derived by testing withdrawals against the worst historical sequences. Treat it as a starting point for discussion rather than a law, and read it alongside our guide to how much you need to retire, which puts the pot size in context.

What the danger zone really argues for is caution with the single biggest decision of all: how much investment risk to carry into the first years of retirement. This is the moment your pot is at its largest, so a given percentage fall costs the most in actual pounds, and it is also the moment you have least time to earn it back before withdrawals compound the damage. Dialling risk down slightly as you approach the finish line, then gradually rebuilding it once the danger zone has safely passed, is a strategy many advisers favour for exactly this reason.

How to defend against it

The encouraging news is that sequence risk is manageable. You cannot control markets, but you can control how exposed your income is to them in the fragile early years. Several defences, often used together, make a real difference.

• 1

  Hold a cash buffer

  Keeping one to three years of spending in cash means you can pause investment withdrawals during a downturn and let the portfolio recover rather than selling low.

• 2

  Stay flexible on withdrawals

  Trimming discretionary spending in bad years, the opposite of a fixed inflation-linked draw, dramatically eases the pressure on your pot.

• 3

  Secure your essentials

  Covering non-negotiable spending with guaranteed income such as the State Pension and an annuity means market falls only ever touch your discretionary money.

• 4

  Get the asset mix right

  Being 100% in equities at the point of retirement maximises sequence risk; a more balanced mix reduces the depth of an early fall.

• 5

  Use guardrails

  Simple rules that raise withdrawals a little after strong years and rein them in after weak ones keep spending sustainable through the cycle.

The safety-versus-growth trade-off

Every defence against sequence risk has a cost, and honest planning means acknowledging it. A large cash buffer protects you in a crash but earns little and can be eroded by inflation over time. An annuity guarantees income for essentials but gives up flexibility and the chance of growth. Holding fewer equities softens early falls but may leave you short of the growth a long retirement needs to keep pace with rising prices, because retirements now routinely last thirty years or more.

The art is balance: enough safety to survive the danger zone, enough growth to fund the decades beyond it. That balance is personal: it depends on your other income, your capacity for loss and how much of your spending is essential versus discretionary. Building it into a wider plan, and revisiting it as markets move, is exactly the kind of ongoing judgement a regulated adviser is there to provide. If you are still assembling your portfolio, our beginner’s guide to how to start investing covers the foundations.

Inflation deserves a special mention here, because the instinct to play safe can quietly backfire. A retirement that lasts thirty years faces the slow erosion of prices doubling or more across its span, so a portfolio held too defensively can fail just as surely as one held too aggressively, not with a dramatic crash, but with a gradual loss of purchasing power that only becomes obvious when it is too late to fix. Guarding against sequence risk must never tip over into surrendering all the growth a long retirement genuinely needs.

Putting it into practice

Sequence risk is not a reason to avoid drawdown, for many people its flexibility and growth potential outweigh the certainty of an annuity. It is a reason to enter drawdown with your eyes open and a plan for the bad years, rather than assuming a smooth average. The retirees who come through a rocky start are almost always the ones who prepared for it: they held a buffer, they were willing to spend a little less when times were tough, and they had not staked their essential income on the market.

It is also worth keeping the risk in proportion. Sequence risk is a reason for respect, not fear: history shows that retirees who held a modest buffer and stayed invested through downturns have generally come through intact, while those who panicked and sold everything near the bottom rarely did. The greatest danger is often not the market itself but the very human temptation to abandon a sound plan at the worst possible moment, which is precisely where a steady, regulated adviser earns their fee, by talking you out of the mistake that would do the real damage.

Above all, sequence risk rewards planning ahead. Decisions taken in the five years before you retire, how much to hold in cash, whether to secure a guaranteed income floor, how aggressively to invest, do far more to protect you than anything you can do once a downturn has already hit. This is information, not personal advice; a vetted, FCA-regulated specialist can stress-test your plan against the worst sequences before you commit to it.