How much do I need to retire in the UK?
The short answer: roughly 25× your annual after-tax spending — about £0.81M for a £30,000/year retirement, £1.08M for £40,000/year, £1.36M for £50,000/year (a 4% withdrawal rate, adjusted for UK tax). The long answer depends on three things the rule of thumb ignores: your age (earlier = longer retirement and a bridge before pension access at 57), your tax wrappers (ISA money goes further than pension or taxable money), and your State Pension (~£12,548/year from 67, which shrinks what your pot must cover).
The numbers, by target income
Computed with the same engine as the calculator — UK tax on withdrawals from a taxable account, 4% withdrawal rate, today's money:
| Spending (after tax) | Portfolio needed |
|---|---|
| £30,000 / year | £0.81M |
| £40,000 / year | £1.08M |
| £50,000 / year | £1.36M |
| £60,000 / year | £1.63M |
| £80,000 / year | £2.19M |
Hold more in an ISA and each figure falls toward a clean 25×, because ISA withdrawals are tax-free. These are portfolio-only targets — counting your State Pension and any DB pension usually lowers the pot you personally need.
Why your age changes the answer
Retire at 65 and the State Pension is two years away, your pensions are unlocked, and the pot has ~25 years to last. Retire at 45 and you face a 12-year lock-out from your pension, 22 years to the State Pension, and a retirement that could run 50 years — so the same spending needs a bigger, differently-shaped pot: more in ISAs and taxable accounts to bridge, and a more cautious withdrawal rate. That's why one number can't answer "how much do I need" — the shape matters as much as the size.
Three levers that shrink the number
1. Wrappers: every £1 of spending funded from an ISA needs less pot than £1 funded from taxed accounts. 2. Later income: the State Pension (~£12,548) and any DB pension mean your investments only top up, not carry, your later years. 3. Flexibility: being able to trim spending in bad markets supports a higher withdrawal rate, which cuts the pot required. A proper plan models all three rather than multiplying by 25.
Model your own numbers — ISA/SIPP split, the bridge to 57, Monte Carlo and more.
Open the free UK FIRE calculator →Frequently asked questions
How much money do I need to retire in the UK?
Roughly 25× your annual after-tax spending — about £0.81M for £30,000/year or £1.36M for £50,000/year once UK tax on withdrawals is included. Your State Pension and tax wrappers can lower the figure.
How much do I need to retire at 55 vs 65?
Retiring earlier needs more: the retirement is longer, the State Pension is further away, and before 57 your pension is locked, so more must sit in accessible accounts. The same spending can need a 20–30% larger pot at 55 than at 65.
Does the State Pension mean I need less?
Yes — the full new State Pension is ~£12,548/year from 67. Once it starts, your investments only need to fund the difference, which can cut the required pot substantially versus a portfolio-only target.
Related guides
InflectionFI is an educational planning tool, not financial or tax advice. Figures are estimates based on your inputs and stated assumptions. Verify your situation with a qualified adviser.