Free Retirement & Investing Tool

FIRE Retirement Calculator

Q: Is the 4% rule guaranteed?

No. Any withdrawal rate is an assumption and outcomes depend on time horizon, allocation, fees, taxes, inflation and market sequence.

Q: Why does inflation affect the time estimate?

The calculator converts nominal return to an approximate real return so the target and savings are compared in today’s purchasing power.

Q: Does FIRE include taxes or healthcare?

Only if those amounts are already included in the annual-expense input.

Q: Are calculator results financial advice?

No. Results are educational estimates and do not replace personalized financial, investment, tax, legal or insurance advice.

Q: Do results clear after I edit an input?

Yes. A displayed result is hidden as soon as an input changes so an old answer is not mistaken for a current calculation.

Q: Can I use the calculator on a phone?

Yes. The page and result panel are responsive for phones, tablets and desktop screens.

Estimate a FIRE number from annual expenses and a withdrawal-rate assumption, then project the time to the target using today’s-dollar savings and a real return.

✓ No sign-up✓ Clear formula✓ Strict input checks✓ Mobile friendly

Calculator

Enter your assumptions

Complete every field. The calculator starts blank so the result reflects only the values you choose.

What is the FIRE Retirement Calculator?

Estimate a FIRE number from annual expenses and a withdrawal-rate assumption, then project the time to the target using today’s-dollar savings and a real return.

The target is expressed in today’s dollars. The time estimate grows current investments at a real rate and adds the monthly savings entered.

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases.

For optional supporting equipment or reference material, you can browse Financial calculators (paid link) on Amazon.com. An optional separate device for checking financial arithmetic. Confirm it supports the functions you need; it does not replace current records or professional advice. No purchase is required to use this calculator.

Formula and calculation method

FIRE number = annual expenses ÷ withdrawal rate; time uses an inflation-adjusted monthly return.

The result uses only the values entered on this page. It does not fetch account balances, market prices, tax returns or provider quotes.

Important limitations

Financial projections simplify real life. Returns can vary, laws and limits can change, inflation is uncertain, and taxes or fees may apply. Review the result as a scenario—not a promise.

Financial scope: Educational estimates only; not financial, investment, tax, legal or insurance advice.