🔥InflectionFI

UK FIRE & early retirement guides

Everything on this site in one place — how much you need to retire, what changes at each retirement age, how the bridge to pension access at 57 works, and how to split saving between ISAs and pensions. Figures in these guides are computed with the same engine as the calculator, so the numbers you read here match the numbers you'll model there.

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UK FIRE CalculatorFree UK-focused FIRE calculator. How much to retire?How much you need to retire in the UK, by target income — computed with UK tax on withdrawals. UK safe withdrawal rateWhat a safe withdrawal rate means for UK early retirement — where the 4% rule comes from, why UK early retirees often use 3.25–4%, and how tax and a long retirement change it.

Retiring at a given age

Retire at 45 in the UKRetiring at 45 in the UK means a 12-year bridge to pension access at 57 and ~22 years to the State Pension. Retire at 50 in the UKRetiring at 50 in the UK means bridging ~7 years to pension access at 57 from ISAs and taxable savings. Retire at 55 in the UKRetiring at 55 in the UK — how much you need, the shrinking gap to pension access, and why the minimum pension age rising to 57 in 2028 matters if you were counting on 55. Retire at 60 in the UKRetiring at 60 in the UK: your private pension is accessible, but the State Pension is still 7 years away.

Is my pot enough?

Is £500k enough to retire?What a £500,000 pot realistically supports in the UK — the sustainable income on a 4% withdrawal rate, the effect of tax, and how the State Pension changes the picture. Is £750k enough to retire?What a £750,000 pot supports in the UK — the sustainable after-tax income on a ~4% withdrawal rate, how the State Pension changes it, and what decides whether it is enough. Is £1 million enough?What a £1,000,000 pot supports in the UK — sustainable income on a 4% rate, the impact of tax and the bridge to pension age, and where the State Pension fits. Retire on £40k a yearTo retire on £40,000 a year in the UK you need roughly £1.08M as a portfolio-only target on a 4% withdrawal rate — less once the State Pension and any DB pension are counted.

Pensions, ISAs & the bridge

Bridge to pension accessIf you retire before 57 in the UK your pension is locked — you must "bridge" the gap with ISAs and taxable savings. ISA vs pensionSaving for early retirement in the UK: pension gives tax relief but locks money until 57; ISA is tax-free and accessible any time. ISA vs SIPP drawdown orderIn UK early retirement, the order you spend your ISA, taxable account and SIPP changes your tax bill and how long your money lasts. State Pension & early retirementRetiring early can leave gaps in your National Insurance record.

FIRE concepts

Coast, Lean & Barista FIREThe main flavours of FIRE for a UK audience — Coast, Lean, Barista, Fat and standard FIRE — what each means, the rough numbers, and which suits which situation. Coast FIRE calculatorWork out your UK Coast FIRE number — the pot that grows to your retirement target with no further saving.

Model your own numbers — ISA/SIPP split, the bridge to 57, Monte Carlo and more.

Open the free UK FIRE calculator →

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.