It’s one of the most common questions we hear from people in their 50s and early 60s, and it’s usually asked the wrong way round. Most people start with a number – “I’ve got £400,000 in my pension, is that enough?” – and hope for a yes or no answer. But a pot size on its own can’t tell you whether you can retire early, reduce your hours, or phase down gradually. What matters is the life you want to lead, what it will actually cost, and whether your combined resources – not just your pension – can sustain it for as long as you need them to.

Here’s how to approach the question properly.

Start with the life, not the number

Before any of the sums make sense, you need a genuine picture of what you want your time to look like. Do you want to stop entirely, or drop to three days a week? Will you travel more in the first few active years of retirement and less later on? Is there a house project, a family commitment, or a hobby that needs real money behind it? Retirement spending is rarely a flat line – it tends to be higher in the early “go-go” years, lower in the middle, and can rise again later if care needs appear.

This is the starting point because it determines the income figure you’re actually testing your finances against. Two people with identical pension pots can have completely different answers to “can I afford to retire early,” because their intended lifestyles are different.

If you want an external reference point, Pensions UK’s Retirement Living Standards (updated annually with Loughborough University) give a useful benchmark for what different lifestyles cost in practice. For 2026/27, a single person needs roughly £13,900 a year for a minimum standard of living, £32,700 for a moderate lifestyle including a European holiday and regular meals out, and £45,400 for a comfortable one with long-haul travel and a newer car. For a couple, the equivalent figures are around £22,500, £45,400 and £62,700. These are national averages, not individual targets – but they’re a helpful sense-check on whether your own number is realistic.

Guaranteed income: the floor everything else sits on

Once you know roughly what you want to spend, the next step is working out how much of that is already guaranteed, regardless of what markets do. This typically includes the State Pension, any defined benefit (final salary) pension, and annuity income if you hold one.

The full new State Pension is currently £241.30 a week, or £12,548 a year, for 2026/27 – but only if you have 35 qualifying years of National Insurance contributions, and only from your State Pension age, which is 66 rising to 67 by 2028. This is a crucial point for early retirement planning: if you stop work at 60 but your State Pension doesn’t start until 67, you have a gap of up to seven years to fund entirely from other sources. Getting your State Pension forecast from GOV.UK before you commit to a date is one of the simplest and most valuable checks you can make.

Guaranteed income is your floor. Everything above it – from investments, cash, and other pensions – carries some degree of variability, and needs to be planned for accordingly.

When you can actually access your money

Timing matters as much as the total figure. Defined contribution pensions (workplace pensions and SIPPs) currently become accessible from age 55, but this minimum pension age is rising to 57 from April 2028 – worth checking carefully if you’re in your early-to-mid 50s and your retirement date sits close to that change. ISAs and general savings have no age restriction at all, which is one reason they’re often used as a bridge for spending before pension or State Pension access opens up.

Mapping out, year by year, which pots of money become available when – and in what order you’d draw from them – is one of the most practical exercises in early retirement planning. It’s common, and often tax-efficient, to draw from ISAs or cash first, use tax-free pension lump sums strategically, and hold taxable pension drawdown back for later years, but the right order depends on your total tax position each year, not a fixed rule.

Tax and inflation: the two quiet erosions

Pension income, once drawn, is generally taxable (aside from the tax-free element, typically up to 25% of your pot subject to your available allowance). Drawing a large amount in one year – to fund an early retirement gap, say – can push you into a higher tax bracket unnecessarily. Spreading withdrawals more evenly, and using ISA or cash reserves to smooth income in higher-need years, can materially reduce the tax you pay over a retirement that might last three decades.

Inflation is the other factor people consistently underestimate. Even at modest rates, prices compound significantly over a 20-30 year retirement. An income that comfortably covers your lifestyle at 60 may fall well short by 75 if it isn’t reviewed and, where possible, increased in real terms. Any cash-flow plan worth relying on should model inflation explicitly, not just assume “the number I need today” holds indefinitely.

Longevity: plan for longer than you expect

It’s tempting to plan around average life expectancy, but averages can be misleading for an individual. Office for National Statistics data shows that a 65-year-old in the UK can currently expect to live a further 18.5 years on average if male, or 21 years if female – and around half of people will live longer than that average, some considerably so. For couples, the chance that at least one partner lives well into their 90s is higher still.

The practical implication is straightforward: a retirement plan that only just works to age 85 carries real risk if one of you lives to 95. Cash-flow modelling that stress-tests a longer-than-average lifespan – alongside a shorter one – gives a much more honest picture of whether your plan is robust, rather than merely optimistic.

Testing the less favourable scenarios

This is where a genuine affordability assessment differs from a rough back-of-envelope calculation. A sound plan doesn’t just check whether your finances work if everything goes roughly as expected – it tests what happens if:

• Investment returns are weaker than assumed, particularly in the first few years of retirement (a poor sequence of returns early on can do disproportionate damage to a drawdown pot, even if long-term average returns are fine)
• Inflation runs hotter than expected for a sustained period
• You or your partner need long-term care, which can cost several hundred pounds a week and isn’t factored into standard living-cost benchmarks
• One partner dies earlier than expected, changing the household’s income and tax position
• You live considerably longer than average

None of these are reasons not to retire early – but understanding how much slack your plan has under each scenario is the difference between a considered decision and a hopeful one. There’s no single “safe withdrawal rate” that suits everyone; the right figure depends on your asset mix, time horizon, flexibility to reduce spending if needed, and how much guaranteed income underpins your plan. Anyone quoting you a single universal percentage is oversimplifying.

Bringing it together

The question “can I afford to retire earlier than planned” can’t be answered by a pension statement alone, however healthy the number on it looks. It depends on the lifestyle you actually want, how much of your income is guaranteed versus market-dependent, when each of your assets becomes accessible, how tax and inflation will erode things over time, how long you and your partner might realistically live, and how your plan holds up when circumstances aren’t ideal.

This is precisely the kind of question cash-flow modelling is built to answer – not a single figure, but a year-by-year picture of your finances under a range of realistic conditions, so you can see for yourself where the plan is comfortable and where it’s tight. At Questa, that’s where we start every early retirement conversation: with the life someone wants, tested properly against the finances that would need to support it.

This article is for general information and does not constitute personal financial advice. Everyone’s circumstances are different, and decisions about retiring early should be based on a full review of your own finances, ideally with the support of a qualified financial planner.