Pension Drawdown: How to Take a Sustainable Income

01 How drawdown works

In flexi-access drawdown your pension pot stays invested and you withdraw income from it whenever you choose — monthly, annually, or in ad-hoc lumps as you need them.

You keep full control. You decide the amount, you can change it from year to year, and whatever remains when you die passes to your beneficiaries — usually free of inheritance tax, and free of income tax entirely if you die before 75. That death-benefit treatment is one of the strongest and least-discussed arguments for drawdown over an annuity.

In exchange you carry every risk yourself. The pot can fall, the income can prove unsustainable, and there is no floor underneath it: draw too hard for too long and it runs out, at which point the income stops. Nobody is standing behind the number.

That trade is the entire decision, and it is worth being explicit that it is a trade rather than an upgrade. Drawdown replaced annuities as the default after the 2015 pension freedoms, but the freedoms removed a requirement, not a risk — the risk an annuity used to absorb did not disappear, it moved onto the retiree.

Source: MoneyHelper — Flexible retirement income

02 The withdrawal rate

The single most important decision in drawdown is how much to take, and it is the one most often made by default rather than deliberately.

A widely used starting point is 3.5% to 4% of the pot a year, increased with inflation — a level that, on historic data, has had a reasonable chance of lasting around 30 years. It is a guideline drawn from past sequences, not a promise about future ones, and it was derived from a particular market history that need not repeat.

Three things move it. Retiring early means the money must last longer, which argues for the lower end or below it — someone stopping at 57 is planning for 35 or 40 years, not 30. A higher-charging or more conservative portfolio delivers less to withdraw from, so the same percentage is a larger real draw on what the pot actually earns. And a guaranteed income floor underneath — the State Pension, a defined-benefit pension, an annuity — reduces how much the drawdown pot itself has to carry, which allows a higher rate on the remainder.

The more useful framing is not a single number but a rule you will actually follow: a starting rate, a review each year against what the pot has really done, and a pre-agreed response to a bad year. A 4% rate reviewed annually is considerably safer than a 3.5% rate set once and never revisited.

The 4% rule is routinely quoted as a UK safe withdrawal rate, and it was not derived from UK data. It comes from US market history, with US returns and a US thirty-year horizon, and applying it unadjusted to a portfolio with different returns, different charges and possibly a longer retirement overstates what is sustainable.

03 Sequence of returns risk

Two retirees can earn the same average return over 30 years and finish in completely different places, because once you are withdrawing, the order of those returns matters as much as their average.

If markets fall early in your retirement you are selling more units to fund each withdrawal, leaving fewer invested to recover when markets rebound. The loss is partly crystallised by the act of living, and no subsequent good year fully undoes it — the units that funded year two's income are simply gone.

This is why the first five years of drawdown carry a disproportionate share of the total risk in a thirty-year retirement, and why the same portfolio that was entirely appropriate at 55 needs more thought at 60.

A cash buffer is the shield. Keeping one to two years of income in cash lets you pause investment withdrawals during a downturn, so you are not forced to sell at the worst possible moment. It is the most effective single protection drawdown offers, it costs only the return forgone on that cash, and it works because it converts an investment decision made under stress into one made in advance.

The refill rule matters as much as the buffer. Top it back up in years when the portfolio is ahead, so it is full when it is needed — a buffer quietly spent down across four decent years is empty exactly when the fifth turns bad.

04 How long a pot might last

It helps to see roughly how a pot behaves under a steady withdrawal and an assumed return. The example below grows the pot each year and subtracts a fixed percentage withdrawal, showing the first-year income and an estimate of the pot after your chosen period.

Source: GOV.UK — Options for using your pension pot

05 Tax and the MPAA

You can usually take 25% of the pot tax-free, either as one upfront lump sum or spread across withdrawals, and the remaining 75% is taxed as income at your marginal rate as you draw it.

Because each taxable withdrawal adds to your income for that tax year, the sequencing matters. Drawing £60,000 in one year and nothing the next is taxed far more heavily than £30,000 in each, and the difference is entirely avoidable. Using the personal allowance every year, and staying under the £50,270 higher-rate threshold where you can, is the most valuable ongoing tax decision in drawdown.

The trap to know about before your first flexible withdrawal is the Money Purchase Annual Allowance. Taking any taxable income from a defined-contribution pension — anything beyond the tax-free cash — permanently reduces how much you can contribute to defined-contribution pensions each year, from the standard annual allowance to £10,000. It is triggered by the first flexible payment and it cannot be undone.

That matters enormously for anyone who might return to work, or who is phasing down rather than stopping. Taking £1 of taxable income at 57 to test the system can cost tens of thousands of pounds of future contribution capacity. Taking only the tax-free cash does not trigger it, which is why the order of withdrawals deserves thought before the first one rather than after.

06 Managing drawdown well

Good drawdown is an ongoing discipline rather than a one-off setup, and the discipline is what you are paying for by not buying an annuity.

Review the withdrawal rate each year against what the pot has actually done, not against what you assumed it would do. Be willing to trim spending after a bad year: flexibility is the feature drawdown offers, and a retiree who never flexes has taken all of the risk and used none of the benefit.

Keep the cash buffer topped up in good years so it is full when a bad one arrives. Hold an investment mix that matches your actual horizon — a 60-year-old in drawdown may be investing for 30 more years, and a portfolio positioned as though the money is needed next year will lose to inflation with certainty.

Watch the tax position annually rather than at the point of a large withdrawal. And revisit the whole arrangement after any significant life change: a partner's death, a health diagnosis, an inheritance, or the State Pension starting all change the amount the drawdown pot needs to produce.

The thing that most often goes wrong is none of these. It is setting a withdrawal at 58, never looking again, and discovering at 74 that the rate that was sustainable for a 30-year retirement has been running against a pot that fell 20% in year three and never recovered the difference.

07 Drawdown against the alternatives

Drawdown is one of three ways to turn a pot into income, and the right answer is frequently a combination rather than one of them.

The last row is the whole comparison. An annuity is not a worse investment than drawdown — it is a transfer of longevity and market risk to someone else, and the price of that transfer is the flexibility and the inheritance. A common answer is to annuitise enough to cover essential spending and keep the rest in drawdown.

Source: MoneyHelper — Pension drawdown