After decades of contributing to a SIPP, the moment arrives when the pot needs to actually become retirement income. UK savers broadly have two main routes for doing this — drawdown or an annuity — and the choice between them (or a combination of both) has lasting consequences for how much income is received, how flexible it is, and what happens to the money if the retiree dies earlier than expected.
The two basic approaches
Drawdown
Pension drawdown keeps the pension pot invested — typically in a mix of funds, shares, and bonds — while the retiree draws an income from it, either regularly or as occasional lump sums. The pot remains subject to investment growth or loss throughout retirement, meaning the size and sustainability of the income depends on ongoing market performance as well as how much is withdrawn.
Annuity
An annuity involves using some or all of the pension pot to purchase a guaranteed income, typically paid for the rest of the retiree's life (or a fixed term, depending on the type purchased), from an insurance company. Once purchased, the income is generally fixed (or fixed to rise in a predetermined way, if an escalating annuity is chosen) regardless of what happens to investment markets afterwards.
The tax-free lump sum
Regardless of which route is chosen, most pension savers are able to take up to 25% of their pension pot as a tax-free lump sum (subject to certain limits set by HMRC), with the remainder used to provide income via drawdown, annuity, or a combination of the two. The remaining 75% is generally taxed as income when it's eventually drawn or converted, in the same way as a salary would be.
Comparing drawdown and annuity
| Feature | Drawdown | Annuity |
|---|---|---|
| Income certainty | Variable — depends on investment performance and withdrawal rate | Guaranteed and fixed (or fixed escalation) for life or a chosen term |
| Flexibility | High — withdraw more or less as circumstances change | Low — income structure generally fixed once purchased |
| Investment risk | Retained by the retiree throughout retirement | Transferred to the insurance company |
| Death benefits | Remaining pot can typically be passed on to beneficiaries | Depends on annuity type — a single life annuity typically stops on death, though joint life or guaranteed-period options exist |
| Longevity risk | Retiree bears the risk of outliving their pot | Insurer bears the risk — income continues for life regardless of how long the retiree lives |
Why drawdown appeals to many retirees
Drawdown offers control: the ability to vary income year to year, respond to changing needs, keep the pot invested with growth potential, and pass on unused funds to beneficiaries. This flexibility is one reason drawdown has become the more commonly chosen route for many UK retirees in recent years, particularly for those with other sources of income or with a reasonably sized pot that doesn't need to be entirely relied upon.
The trade-off is that the retiree bears investment risk and the risk of running out of money if withdrawals are too high or markets perform poorly over an extended period, especially in the earlier years of retirement — a risk sometimes called "sequence of returns risk," where poor early performance combined with ongoing withdrawals can permanently damage a pot's ability to recover.
Why an annuity still appeals to some
An annuity removes uncertainty entirely: once purchased, the retiree knows exactly what income they'll receive, for as long as they live, regardless of what happens to markets or how long they live. This can be valuable for retirees who prioritise certainty and simplicity over flexibility, or who worry about managing investment decisions well into old age, or who have no desire to leave an inheritance from this particular pot and simply want reliable income for life.
Annuity rates — how much income a given pot buys — are influenced by factors including prevailing interest rates, the retiree's age, and health (some "enhanced annuities" pay more to those with certain health conditions or lifestyle factors, since life expectancy is statistically shorter). Rates fluctuate over time with broader financial conditions, so the income available from a given pot size varies depending on when it's purchased.
A worked example
Suppose a retiree has a £300,000 SIPP at retirement and takes the standard 25% (£75,000) tax-free lump sum, leaving £225,000 to provide income.
- If they purchase an annuity with the full £225,000, they might, purely hypothetically and depending on prevailing rates at the time, secure a fixed income of around £12,000–£14,000 a year for life — the exact figure depends entirely on rates, age, and annuity type at the time of purchase, and this range is illustrative only, not a quote.
- If they instead use drawdown and withdraw at a rate of, say, 4% a year (a commonly discussed but not guaranteed "safe withdrawal rate" benchmark), that would be £9,000 in the first year, with the actual future income depending on how the remaining pot performs and how withdrawals are adjusted over time.
Neither figure is a promise — annuity rates vary by provider and time, and drawdown income is never guaranteed since it depends on investment performance. The example simply illustrates the different nature of the two approaches: one offers certainty at a potentially lower starting income, the other offers flexibility and growth potential but with variability and risk.
Types of annuity worth understanding
Annuities are not a single, uniform product. A single life annuity pays income only for the purchaser's own lifetime and stops on death. A joint life annuity continues paying (often at a reduced rate) to a surviving spouse or partner after the first death. A guaranteed-period annuity continues paying for a minimum term (for example, five or ten years) even if the retiree dies within that period, with remaining payments going to their estate. An escalating annuity increases income each year, often in line with inflation or a fixed percentage, starting lower than a level annuity but offering some protection against rising prices over a long retirement.
Drawdown withdrawal strategies
Within drawdown, retirees can take income in different ways: a fixed regular amount, a variable amount adjusted to market performance, or ad hoc lump sums as needed. Some retirees deliberately reduce withdrawals during a market downturn to avoid selling investments at depressed prices, while others prioritise a stable, predictable income and accept the extra risk to the pot's longevity that comes with that consistency. There is no single correct withdrawal strategy — it depends on other income sources, spending needs, and how much variability in income the retiree can comfortably tolerate.
A blended approach
Many retirees don't choose exclusively one or the other. A common approach some consider is using part of the pot to buy an annuity covering essential living costs — providing a guaranteed income floor — while leaving the rest in drawdown for flexibility, discretionary spending, and potential growth. This blended approach can combine some of the security of an annuity with some of the flexibility of drawdown, though the right balance depends heavily on individual circumstances, other income sources, and attitude to risk.
Getting professional guidance
Because these decisions are typically made once, with irreversible consequences (an annuity, once purchased, generally can't be unwound), many retirees choose to use the free Pension Wise guidance service (available to those over 50 with a defined contribution pension) or seek regulated financial advice before finalising a decision, particularly for larger pots or complex circumstances.
Common mistakes to avoid
Purchasing an annuity without shopping around
Annuity rates vary noticeably between providers for the same pot size, age, and health profile, and retirees are not obliged to buy an annuity from their existing pension provider. Using the "open market option" to compare rates across providers — and disclosing relevant health and lifestyle information that might qualify for an enhanced rate — can make a meaningful difference to lifetime income from the same pot.
Underestimating how long retirement might last
Because life expectancy varies considerably and continues to shift over time, a drawdown strategy based on an overly short expected retirement can leave a retiree drawing down their pot faster than it can sustainably support, particularly if they live longer than initially planned for.
Withdrawing too much in the early years of drawdown
As noted above, poor investment performance combined with high withdrawals early in retirement can permanently impair a pot's ability to recover, even if markets later improve — a risk that a level, unadjusted rate of withdrawal doesn't automatically protect against.
Frequently asked questions
Can someone switch from drawdown to an annuity later, or vice versa?
Money in drawdown can generally be used to purchase an annuity at any later point, since the pot remains a pension until converted. However, an annuity, once purchased, typically cannot be converted back into a flexible drawdown arrangement — the decision to annuitise a given sum is generally a one-way, irreversible step, which is why timing and comparison shopping matter so much.
What happens to a drawdown pot if the retiree dies?
Any remaining pot in drawdown can generally be passed on to nominated beneficiaries, with the tax treatment depending on the retiree's age at death and specific circumstances — this is covered in more detail in relation to SIPP death benefits generally.
Key takeaways
- Most pension savers can take up to 25% of their pot tax-free, with the remainder providing income via drawdown, annuity, or a combination.
- Drawdown keeps the pot invested and offers flexibility and growth potential, but the retiree bears investment risk and the risk of running out of money.
- An annuity provides guaranteed income for life (or a chosen term), removing investment and longevity risk, but with less flexibility once purchased.
- Annuity rates vary with interest rates, age, and health, so the income available from a given pot size changes over time.
- A blended approach — part annuity, part drawdown — is one way some retirees balance security with flexibility.
- Given the largely irreversible nature of these decisions, free Pension Wise guidance or regulated financial advice is widely recommended before finalising a choice.