Sequencing Risk in Retirement Explained

Two retirees can have exactly the same average investment return over a twenty-year retirement, draw the same amount of income each year, and yet end up in wildly different financial positions — one comfortably funded for life, the other running out of money a decade early. The difference isn't the average return at all; it's the order in which the good and bad years arrive. This is sequencing risk, and it's one of the most important, and least intuitive, concepts in retirement income planning. This guide explains what sequencing risk means at a whole-retirement level, why it's unique to the years you're withdrawing money rather than saving it, and the practical strategies you can build into an overall income strategy to manage it.

What sequencing risk actually means

Sequencing risk (sometimes called sequence-of-returns risk) is the danger that the specific order of investment returns you experience, not just their long-run average, has an outsized and often permanent impact on how long your retirement savings last. It matters because you're not simply watching a pot of money grow or shrink in isolation — you're also taking money out of it at the same time, and the two things interact in a way that isn't obvious at first glance.

If a portfolio falls sharply in value in the same year you're also withdrawing income from it, you're forced to sell a larger proportion of your remaining holdings to raise the same amount of cash. Those units or shares are gone for good — sold at a low price — and can never benefit from the eventual market recovery, because they no longer belong to you. This is fundamentally different from a fall in value happening to a pot you're not touching, where a subsequent recovery simply restores the balance. Once withdrawals are involved, a downturn at the wrong moment can permanently shrink the size of the pot that's left to recover.

A simple worked comparison

The clearest way to see sequencing risk is to compare two people with the identical average annual return over five years, but with the order reversed, both starting with a £300,000 pot and withdrawing £15,000 a year (adjusted for the return each year for simplicity).

Both retirees experience exactly the same five annual returns and the same average return overall — only the order is reversed. Yet Retiree A, who suffers the sharp falls in the first two years while still withdrawing a fixed £15,000 annually, ends up with a noticeably smaller pot than Retiree B, who experiences the same falls later, after several years of growth had already built up a larger buffer. This is sequencing risk in miniature: identical long-run average returns, but a materially different outcome, purely because of when the poor years happened relative to the withdrawals.

Why this risk is unique to the decumulation phase

During your working life, while you're still contributing to a pension rather than drawing from it, the order of returns matters far less. If markets fall sharply the year before you retire, but you're not withdrawing anything, a subsequent recovery restores your position in full — nothing was sold at the bottom, so there's nothing permanently lost. You might even benefit, since ongoing contributions buy more units while prices are low. This is why market volatility during your accumulation years, while uncomfortable to watch, rarely causes lasting damage provided you don't panic-sell.

The moment you start drawing an income — the "decumulation" phase — this changes completely. Withdrawals lock in the sale of assets at whatever price happens to prevail at the time, and a downturn combined with withdrawals compounds the damage in a way that simply doesn't occur during accumulation. This is precisely why sequencing risk is described as a retirement-specific risk: it doesn't meaningfully exist before you start taking money out, but becomes one of the single biggest threats to a retirement income plan the moment you do.

Portfolio-level strategies for managing sequencing risk

Because sequencing risk stems from the collision of withdrawals and market falls, most practical defences work by breaking that collision apart — either by avoiding the need to sell growth assets during a downturn, or by reducing how much you need to withdraw in a poor year in the first place.

Hold a cash or bond buffer. Keeping one to three years of essential spending in cash or lower-risk assets, separate from your growth investments, means a market fall doesn't force you to sell shares at a low point purely to cover this month's bills. You draw from the buffer instead, and only top it back up from growth assets once markets have recovered. This single idea, formalised, is essentially what underpins the bucket strategy covered in detail elsewhere on this site.

Be willing to flex discretionary spending. A plan that separates essential spending (covered by guaranteed income and the cash buffer) from discretionary spending (holidays, big purchases, gifts) gives you room to simply spend a little less in a bad year, rather than being forced to sell a fixed amount of investments regardless of market conditions. This flexibility is one of the most effective, and most underrated, defences against sequencing risk — it directly reduces how much needs to be withdrawn precisely when withdrawing would do the most damage.

Delay large one-off purchases in poor years. If markets have fallen sharply, postponing a big discretionary expense — a new car, a major home improvement, an expensive holiday — until values have recovered avoids crystallising losses on the assets you'd otherwise need to sell to fund it. This isn't always possible, but building the expectation of some flexibility into your plan from the outset makes it much easier to act on when the moment actually arrives.

Keep your withdrawal rate conservative in the early years. Because the first decade of retirement carries the most sequencing risk (a downturn here has decades to compound, whereas a downturn late in retirement has less time to matter), some retirees choose to draw slightly more conservatively in their first few years than a long-term average would suggest, giving the portfolio a better chance to establish a growth cushion before it faces its first real test.

Diversifying across guaranteed and invested income

Another portfolio-level defence against sequencing risk, closely related to holding a cash buffer, is deliberately diversifying your overall income strategy across different types of income rather than relying solely on invested drawdown. A retirement income built from a mix of state pension, perhaps a small defined benefit pension or annuity, and a drawdown portfolio for the remainder is inherently less exposed to sequencing risk than one funded entirely from an invested pot, simply because a smaller share of total spending depends on selling investments at whatever price happens to prevail in any given year. This is one of the strongest arguments for treating annuities and guaranteed income sources not as old-fashioned alternatives to drawdown, but as a complementary tool that specifically reduces sequencing risk for the portion of spending they cover.

How this connects to sustainable withdrawal rates

Sequencing risk is one of the main reasons that sustainable withdrawal rate discussions are so heavily caveated. A commonly cited starting point is an initial withdrawal rate of around 3% to 4% of a portfolio's value, adjusted for inflation each year, but this figure implicitly assumes a certain amount of resilience against a poor sequence of returns occurring early on. A withdrawal rate that looks perfectly sustainable based on long-run average returns can still fail if the portfolio happens to experience its worst years right at the start of retirement. Our detailed guide on sustainable withdrawal rates explores this trade-off, and our page specifically on sequencing risk within drawdown mechanics goes further into the practical detail of managing it fund by fund.

Why sequencing risk catches people off guard

Sequencing risk is unintuitive because most of us are taught to think about investment returns as averages. "The stock market returns around 5% a year over the long run" is a perfectly true statement, but it quietly hides an enormous amount of year-to-year variation, and it says nothing at all about the order in which those good and bad years arrive for any individual investor. During accumulation, that variation mostly washes out, which reinforces the (correct, in that context) intuition that averages are what matter. Carrying that same intuition into retirement, where withdrawals are also happening, is where the trouble starts — the average return can be entirely unchanged while the outcome for an individual retiree is completely different, purely because of ordering.

This is also why sequencing risk is so easy to miss when looking at simplified retirement calculators that only ask for an assumed average annual return. A calculator that assumes a flat 5% return every single year will always show a portfolio lasting longer than reality is likely to deliver, because real markets never actually behave that smoothly — and it's the smoothing-out that hides the risk. Any serious retirement projection needs to account for the possibility of a genuinely poor run of years happening early on, not just an average return spread evenly across the whole retirement.

The interplay between sequencing risk and longevity

Sequencing risk and longevity risk (not knowing how long your money needs to last) reinforce each other in an important way. A retiree facing a poor sequence of returns early on needs their remaining pot to stretch further, for longer, precisely at the moment it has been most reduced — and if they also happen to live longer than average, that pressure compounds even further over time. This is part of why guaranteed, inflation-linked income sources like the state pension are so valuable as a foundation: they don't suffer from sequencing risk at all, since there's no pot to draw down and no market value to fall. Every pound of essential spending that's covered by guaranteed income is a pound that never needs to be exposed to a bad sequence of investment returns in the first place.

This is also why income strategy, sequencing risk, and longevity all sit together as a connected set of decisions rather than separate problems to solve individually. A plan that leans heavily on private pension drawdown from an early retirement age, with little guaranteed income to fall back on, is more exposed to sequencing risk than one where guaranteed income already covers the essentials and drawdown is only funding the more flexible, discretionary layer of spending on top.

Reviewing your plan after a market downturn

If a significant downturn does happen early in retirement, the temptation is either to panic and cut spending drastically, or to carry on exactly as planned and hope for the best. Neither extreme is usually the right response. A more measured approach is to revisit your plan specifically in light of the fall: check whether your cash or bond buffer is still sufficient to cover essential spending for the next year or two without needing to sell growth assets at depressed prices, consider trimming discretionary spending modestly until markets recover rather than cutting it to zero, and avoid making any large, irreversible decisions — like fully cashing out a pension or switching entirely to cash — purely in reaction to a single bad year.

It's also worth remembering that a downturn early in retirement, while uncomfortable, doesn't automatically mean your plan has failed. A plan built with sequencing risk in mind from the outset — with a sensible buffer, some flexibility in spending, and a realistic (rather than optimistic) withdrawal rate — is specifically designed to absorb exactly this kind of event without derailing the whole retirement. The purpose of planning for sequencing risk isn't to avoid ever experiencing a downturn; it's to make sure that when one inevitably happens, it's a manageable setback rather than a permanent problem.

Sequencing risk is a design problem, not a prediction problem

It's tempting to respond to sequencing risk by trying to predict when a downturn will happen and adjust your withdrawals accordingly — but this is exactly the wrong approach, since reliably timing markets isn't something even professional investors manage consistently. The far more robust response is to design a retirement income strategy that doesn't depend on getting the timing right at all: one with enough of a buffer, enough flexibility in spending, and enough diversification across guaranteed and invested income that a poor sequence of returns, whenever it happens to arrive, is an inconvenience rather than a catastrophe.