It depends on how much you draw, how your investments perform and how long you live. A common rule of thumb is that withdrawing around 4% of your pot a year, rising with inflation, gives a strong chance of lasting 30 years, but drawdown carries no guarantees.
The short answer
- Whether your pension lasts depends mainly on your withdrawal rate, the lever you control.
- Longevity risk and sequence-of-returns risk are the two biggest threats.
- Drawing around 3.5%–4% a year, rising with inflation, has historically lasted 30 years.
This is the question that keeps most new retirees awake, and it has no guaranteed answer, but it is far more controllable than it feels. Whether a pension lasts your whole life comes down to three levers: how much you withdraw, how your investments perform, and how long you live. You cannot control the second or third with any precision, but you have real command over the first, and that is usually what makes the difference between a pot that endures and one that runs dry.
The two risks that empty a pot
Two dangers work against you. Longevity risk is simply living longer than your money was planned to last, a real possibility when a healthy 65-year-old today has a decent chance of reaching 90 or beyond. Sequence-of-returns risk is more subtle: if markets fall sharply in your first few years of drawdown while you are also taking income, you crystallise losses that later gains cannot fully repair. The same average return delivered in a different order can be the difference between comfort and shortfall. Our guide to longevity risk explores both in depth.
Longevity risk is easy to underestimate because we tend to plan around average life expectancy, but averages are exactly the point where half of people live longer. Roughly one in four 65-year-olds will reach 90, and around one in ten will see 95. Planning only to the average leaves a real chance of outliving your money in precisely the years when you are least able to return to work or absorb a cut. A sound plan therefore stress-tests against a long life, not a typical one, and treats the possibility of reaching 100 as something to prepare for rather than dismiss.
How much can you safely draw?
The best-known guideline suggests withdrawing around 4% of your pot in the first year, then increasing that amount with inflation each year. Historically this has given a strong chance of a pot lasting 30 years. It is a starting point, not a promise, UK charges, lower expected returns and longer lifespans mean many advisers now treat 3.5% as a more cautious anchor. The table below shows what different rates mean for a £400,000 pot.
What makes the withdrawal rate so powerful is that it is the one variable entirely in your hands. You cannot dictate returns and you cannot know your own lifespan, but you decide, every year, how much comes out. Small differences compound enormously over three decades: drawing 5% rather than 4% may feel like a modest indulgence, yet across a long retirement and a poor sequence of returns it can be the difference between a pot that comfortably outlives you and one that runs dry in your early 80s. Treating your withdrawal rate as a dial you can turn, rather than a fixed setting, is the single most useful mindset a drawdown investor can adopt.
First-year income from a £400,000 pot at different withdrawal rates
| Withdrawal rate | First-year income | Approach |
|---|---|---|
| 3.0% | £12,000 | Very cautious, high margin of safety |
| 3.5% | £14,000 | Cautious, popular UK anchor |
| 4.0% | £16,000 | Classic rule of thumb |
| 5.0% | £20,000 | Higher risk of running short |
Five ways to make it last
- 1
Keep a cash buffer
Hold one to two years of spending in cash so you never have to sell investments in a falling market.
- 2
Stay flexible on withdrawals
Trim your income a little in poor years and take more in good ones, dynamic spending dramatically improves how long a pot lasts.
- 3
Cover essentials with guaranteed income
Use your state pension and, if needed, an annuity so your must-pay bills are secure for life whatever markets do.
- 4
Mind the charges
Every 1% in fees is roughly 1% less you can safely draw, keep platform and fund costs lean.
- 5
Review every year
Reassess after big market moves or life changes; a plan that adapts survives far better than one set in stone.
The reassuring truth is that very few people run their pot to zero and fall off a cliff. What tends to happen instead is a gradual course-correction: a retiree who hits a rough patch trims their spending, defers a big purchase, or leans a little harder on guaranteed income for a year or two, and the pot recovers. The danger is not usually catastrophe but drift, spending on autopilot without noticing the trajectory. That is exactly what a plan prevents.
A cash-flow plan that models your income across your whole life, including the possibility of living to 100, turns this from a worry into a number you can manage. It is worth taking regulated advice to build one; Vetted Wealth can match you free with an independently vetted specialist. This is information, not personal advice, and investments can fall as well as rise. See also our overview of how much you need to retire and retirement planning more broadly.
In summary
- Whether your pension lasts depends mainly on your withdrawal rate, the lever you control.
- Longevity risk and sequence-of-returns risk are the two biggest threats.
- Drawing around 3.5%–4% a year, rising with inflation, has historically lasted 30 years.
- A cash buffer, flexible spending and guaranteed income for essentials all extend a pot.
- Annual reviews and a lifetime cash-flow plan turn uncertainty into something manageable.
Sources and further reading
- Taking your pension MoneyHelper
- The new State Pension GOV.UK
- Check your State Pension forecast GOV.UK
Read the full guide
For the complete picture, see our in-depth guide: Longevity Risk: Making Your Money Last.
Speak to a vetted retirement planning specialist
This is free information, not personal advice. When you’re ready, we’ll match you with an independently vetted, FCA-regulated specialist, free, and with no obligation.
