FIRE Calculator

Plan your Financial Independence and Retire Early journey with UK-specific tax rules, State Pension, and pension wrappers.

Current age

Target retirement age

Annual expenses in retirement

Safe withdrawal rate

Expected return

Inflation rate

Include State Pension

NI qualifying years

Need 10-35 years. Full State Pension is £11,973/yr

Include DB (defined benefit) pension

Your FIRE Number

FIRE Number£531,949

Portfolio income needed£21,278/yr

State Pension income£11,973/yr

Effective withdrawal rate5.6%

To cover £30,000 in annual expenses from age 50 to 100, you need a portfolio of £531,949. The State Pension ({fmt(fireNumberResult.statePensionIncome)}/yr from age 68) reduces how much you need from your portfolio.

Retirement income sources

Portfolio£21,278

State Pension£11,973

How the FIRE number works

The FIRE number is the portfolio value that, combined with other income sources, sustains your spending for the rest of your life.

This accounts for investment growth at 7% nominal (4.5% real after 2.5% inflation), plus State Pension and any DB pension kicking in at different ages.

The simple rule of “expenses ÷ SWR” gives £750,000. With State Pension, you need less.