Turning a pension pot into an income
Once you reach retirement, a defined contribution pension pot needs to be converted into an actual income somehow, and there are several ways to do that — drawing it down flexibly while it stays invested, buying a guaranteed annuity, taking cash lump sums as needed, or some combination of these. This calculator uses the simplest illustration: applying a withdrawal percentage to your pot to show what annual and monthly income that rate would produce in the first year.
Where the 4% figure commonly comes from
A withdrawal rate around 4% is often cited as a rough historical starting point for how much could be withdrawn from an invested portfolio each year, adjusted for inflation, with a reasonable (though never certain) chance of the pot lasting 25 to 30 years without running out, based on historical market analysis. It's a widely referenced rule of thumb rather than a guarantee, and its safety depends heavily on how the pot is invested, actual market returns during retirement, and how strictly the withdrawal amount is adjusted (or not) each year.
Pension drawdown versus buying an annuity
This calculator models the drawdown approach — keeping the pot invested and withdrawing from it periodically. The alternative, buying an annuity, exchanges some or all of your pot for a guaranteed income for life (or a fixed term) from an insurer, removing investment risk and the possibility of running out, in exchange for giving up control of the capital and typically any growth potential. Our pension drawdown guide and annuities guide cover each option, and many retirees in practice use a blend of both rather than choosing exclusively one or the other.
Why a higher withdrawal rate carries more risk
Withdrawing at a higher rate produces a larger income today, but increases the risk of depleting the pot faster than expected, particularly if poor investment returns occur early in retirement (a risk known as "sequence of returns" risk) or if you live longer than typically assumed. There's no single "safe" percentage that suits everyone — it depends on your total pot size, other income sources such as the State Pension, your health and expected longevity, and how much flexibility you have to reduce withdrawals in a bad year.
Using this alongside a retirement income target
This calculator shows what a given pot and withdrawal rate could produce; a genuinely useful next step is comparing that figure against what you'd actually like to live on in retirement. Our "how much do I need to retire?" calculator works in the other direction — starting from a target income and working out the pot size required to support it — which is often the more useful way to plan while you're still building your pension rather than only checking after the fact.
A worked example
Using the calculator's defaults, a £250,000 pension pot at a 4% assumed withdrawal rate produces an illustrative income of £10,000 a year, or about £833 a month, in the first year of retirement. On top of the full new State Pension, that would bring total illustrative retirement income into a range many people find broadly liveable, though obviously highly dependent on individual circumstances and spending needs.
Increase the withdrawal rate to 5% on the same £250,000 pot, and the income rises to £12,500 a year, about £1,042 a month — roughly 25% more income, but drawn at a rate more likely to deplete the pot faster if investment returns disappoint, particularly in the early years of retirement. This trade-off between a higher income now and a higher risk of running out later is the central tension in almost every drawdown decision.
Reviewing your income need each year
Retirement spending rarely stays perfectly flat from year to year — many retirees spend more in the earlier, more active years of retirement and less later on, while others face rising costs later in life due to health or care needs. Reviewing your withdrawal amount annually, rather than setting it once and leaving it unchanged for decades, gives you the flexibility to respond to both how your pot is actually performing and how your own spending needs are genuinely changing, rather than sticking rigidly to a figure calculated years earlier under different assumptions.
Frequently asked questions
Is a 4% withdrawal rate right for me?
It's a widely cited starting point rather than a personalised recommendation — your own appropriate rate depends on your pot size, other income, how long the pot needs to last, and your investment strategy in retirement. A regulated financial adviser can model this properly using your actual circumstances.
Do I have to withdraw at a fixed percentage every year?
No — flexible drawdown allows you to vary how much you take out each year, which many retirees use to reduce withdrawals during poor market years to help the pot last longer, though this obviously means a less predictable income.
Is my pension income taxed?
Yes, in most cases — pension income (other than the tax-free lump sum you're typically entitled to take) is taxed as income in the year you receive it, so your marginal Income Tax rate applies just as it would to a salary.
Can I combine drawdown income with an annuity?
Yes — many retirees use part of their pot to buy an annuity for guaranteed baseline income and keep the rest in drawdown for flexibility, rather than committing the entire pot to one approach exclusively.
Does the withdrawal rate need to stay the same every single year?
No — many retirees vary it deliberately, taking a little less in years following poor investment performance and a little more in stronger years, which can help a pot last longer than a rigid, unchanging withdrawal amount.
What happens if I take too much out too early?
Withdrawing at a rate the pot's investment growth can't sustain risks depleting it faster than planned, particularly if poor returns hit in the early years of retirement — this is one of the main reasons a cautious, regularly reviewed withdrawal rate is generally preferred over an aggressive fixed one.