Ask most people how much they need to retire and you'll get a round, confident number. Half a million. A million. Whatever the last headline said.

But the honest answer doesn't start with a pot. It starts with a question: how much do you want to spend? Fix the spending, and the pot is just maths.

The trouble is that the maths has a twist most headline figures quietly skip. The pot behind a modest-sounding retirement income is bigger than most people expect. And the way you draw that pot changes how big it actually needs to be.

What the Retirement Living Standards actually buy

The most useful UK yardstick for "how much do I need" is the Retirement Living Standards, published by Pensions UK (formerly the PLSA) and updated each year. Rather than guess, they cost out three realistic lifestyles and tell you the annual spending each one takes.

Three levels, in plain terms:

• Minimum: your needs are covered, with a little left over. A modest social life, no car for a single person, holidays in the UK.
• Moderate: more financial security and flexibility. A car, a two-week holiday in Europe, meals out with some regularity.
• Comfortable: more luxuries. A newer car, longer or more frequent holidays, and generally not having to think hard before spending.

Here are the current published figures. These are annual spending amounts, for people who own their home outright and live outside London. If you're still paying a mortgage or rent, or you're in the capital, the numbers rise.

Figures: the current edition of the Retirement Living Standards (annual expenditure, homeowners outside London). Updated annually, so worth re-checking before you plan around them.

Two things jump out. A single person needs meaningfully more than half of what a couple needs, because one person can't split the fixed costs of a home. And "Moderate," the level most people picture when they imagine a normal retirement, is not a small income. It's £32,700 a year, every year, for the rest of your life.

The number most headlines quietly assume

Here's where the pot gets bigger than people expect.

To turn a pot into a guaranteed income for life, the traditional route is to buy an annuity: you hand over the pot, an insurer pays you a set income until you die. Many "you need £X to retire" figures are built on exactly that assumption, and often on a private pot doing all the work on its own.

Fund the entire £32,700 Moderate target from a taxable pension via an annuity, with no State Pension counted and no tax planning, and the pot required runs close to £940,000. That's the version of the number that makes people despair.

But it's the wrong starting point, for two reasons.

First, the State Pension is doing far more than most people credit. The full new State Pension in 2026/27 is £241.30 a week, or about £12,548 a year, paid for life and rising each year under the triple lock. For a single person chasing the £32,700 Moderate standard, that's well over a third of the target already covered, before your own savings do anything.

Second, an annuity is only one way to draw an income, and rarely the most tax-efficient one. You can instead keep the pot invested and draw from it flexibly (drawdown), and you can choose which pot to draw from in which year. That choice is where the tax is won or lost.

Why the pot you truly need is smaller than the headline

Your retirement income doesn't have to come from one tap. Most people retire with a mix, and each one is taxed differently:

• Pensions (a workplace pension, or a SIPP, a Self-Invested Personal Pension). Taxable as income when you draw them, but you can normally take 25% of the pot as tax-free cash.
• ISAs (Individual Savings Accounts). Every withdrawal is completely tax-free, forever.
• The State Pension. Taxable, but for many retirees it sits within the tax-free Personal Allowance (£12,570 in 2026/27), so in practice little or no tax is paid on it.

Blend those deliberately, and you can hit the same net spending with a lot less gross income, because you pay less tax along the way. Less gross income needed means a smaller pot needed.

Consider Priya, a fictional saver, 67 and single, living in England with her home paid off. She wants the Moderate standard: £32,700 a year to spend. Her State Pension covers £12,548, leaving a gap of roughly £20,000 a year for her own savings to fill.

Below is the same target, funded three ways. To keep it fair, each row uses the same simple assumption: a sustainable 4% withdrawal (the well-known "pot equals 25 times the annual income" rule of thumb), so the only thing changing between rows is how the income is taxed.

Illustrative only, on stated assumptions: single person, 2026/27 figures, England, Wales and Northern Ireland income tax (rates differ in Scotland), a 4% sustainable withdrawal, and the full new State Pension. Your own numbers will differ.

Same lifestyle. Same £32,700 a year. Yet the pot required falls from a frightening ~£940,000 to somewhere nearer £580,000, and most of that shift comes not from earning more or saving harder, but from counting the State Pension honestly and drawing income in a tax-efficient order.

The catch worth stating plainly: drawdown keeps your pot invested, and investments can fall as well as rise, so a flexible income carries risk an annuity doesn't. There's no single right answer, and that's rather the point. The right pot depends on how you intend to draw it.

Couples have a hidden advantage

A couple doesn't simply need double a single person's pot. In fact the Moderate couple figure (£45,400) is less than 1.4 times the single figure, because two people share a home's fixed costs.

They also get two structural tax gifts:

• Two State Pensions. Two full new State Pensions come to roughly £25,000 a year between them, covering more than half the Moderate couple target on their own.
• Two Personal Allowances. Each partner can draw taxable pension income up to their own £12,570 allowance, so a couple can pull far more income out at low or zero tax than one person ever could. Which partner draws from which pot, and when, becomes a genuine lever.

Get that sequencing right across two people and several accounts, over thirty-odd years of retirement, and the difference compounds. Get it wrong and you hand over tax you never needed to pay.

So, how much do you actually need?

The honest answer is: less than the scariest headline, more than you'd hope, and a figure that is genuinely personal. It depends on the lifestyle you want, your State Pension entitlement, the mix of pensions and ISAs you hold, and the order you draw them in.

That last part, the sequencing, is precisely the calculation that separates a pot of £940,000 from one of £580,000 for the very same retirement. It's too fiddly to eyeball and too important to guess.

It's also exactly the question Optiml UK is being built to answer on your own numbers. Optiml models your whole retirement horizon, ties your pensions, ISAs and State Pension into one plan, and works out which pot to draw in which year to keep more of what you've saved. We plan the tax; we don't recommend specific funds or products. Optiml is coming to the UK, and the waitlist is where to be if you'd like to run your own version of the table above when it lands.

Because the real question was never "what's the magic number." It's "how do I make my number work harder."

Retirement isn't a finish line you buy. It's a plan you draw down.