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FIRE Calculator (Financial Independence)

Calculate your FIRE number — the portfolio size at which investment returns can cover your living expenses forever.

How to use this tool

  1. 1Paste or type your input above.
  2. 2The result updates instantly.
  3. 3Copy the output with one click.

Frequently asked questions

What is the 4% rule?+

Historically, withdrawing 4% of a balanced portfolio in year one (then adjusting for inflation) survived almost every 30-year retirement period. Your FIRE number is therefore ~25× annual expenses.

Is my data private?+

Yes. The tool runs entirely in your browser — nothing you paste or type is uploaded to a server.

Learn more

  • FIRE Calculator (Financial Independence): formula and example
  • fire calculator explained
  • Common mistakes with fire calculator