Evidence over opinion Issue 2026
Rational GB Evidence-based money

Tools

How Much Do I Need to Retire? UK Retirement Number Calculator

By the Rational GB team · Updated 2026 · Evidence-checked

Your retirement number is the size of pot that lets your investments, not your salary, pay the bills. Enter the yearly income you want and a withdrawal rate you are comfortable with, and this calculator works out the pot behind it. The lower and safer your withdrawal rate, the bigger the pot you need.

Your retirement number

This is a planning rule of thumb, not a guarantee. Safe withdrawal research is based on historic market returns and does not promise your money will last; sequence of returns, fees and how flexibly you spend all matter. Treat the number as a target to aim at and review it as you go.

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