How much do I need to retire early in the UK?
A common rule of thumb is your yearly spending × 25, which is the 4% rule. So if you'd spend £20,000 a year, that's £500,000. Retiring young means a longer retirement, so many people use × 28 to × 33 (a 3.5% or 3% withdrawal rate) to be safer. If your money is in a pension, add a bit for tax. The State Pension can cover part of your spending later on.
What is a FIRE number (or Unicorn Number)?
FIRE stands for Financial Independence, Retire Early. Your FIRE number, which we call your Unicorn Number, is the amount of invested money that could pay for your lifestyle every year, rising with inflation, so work becomes optional.
When can I access my pension in the UK?
You can usually take money from a private or workplace pension from age 55. This rises to 57 from 6 April 2028, unless you have a protected pension age. Money in an ISA can be taken out at any time.
What is the 57 gap?
If you stop working before 57, your pension is still locked, so you need money you can actually touch, like ISAs or savings, to pay the bills until then. The Pot Planner shows whether your ISA would run out before your pension unlocks.
How much is the State Pension and when does it start?
The full new State Pension is £241.30 a week (£12,548 a year) from April 2026. You usually need 35 years of National Insurance to get the full amount. State Pension age is rising to 67 between 2026 and 2028, and under current law to 68 for anyone born from 6 April 1977. Check your own forecast on GOV.UK.
Does the calculator include inflation?
Yes. Everything is shown in today's money, so £1 means what £1 buys now. We assume 2.5% inflation and investment growth on top of that, and we also show what your numbers would look like in future pounds.
Is this financial advice?
No. Broke Unicorn is general information and maths for education. For advice on your own situation, speak to a regulated financial adviser or the free, government-backed MoneyHelper service.