Before calculating
Prepare Annual spending target and Withdrawal rate as a decimal. Match each input to the document, measurement, or current source you are using. Keep units, dates, currency, and time periods consistent.
LONG-TERM SAVING SCENARIOS
FIRE Number Calculator
Estimate a target portfolio from annual spending and a withdrawal rate you choose.
Review your result
Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Target portfolio = annual spending ÷ assumed withdrawal rate.
Assumptions
Withdrawal rates, taxes, inflation, lifespan, returns, and market losses are uncertain and personal.
Use case
fire calculator: a clear planning check
Estimate a target portfolio from annual spending and a withdrawal rate you choose. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context.
Use a clear fire calculator scenario with values you can verify before relying on the result.
Build a reliable scenario
How to use and verify your FIRE Number Calculator result
FIRE Number Calculator helps you check a specific savings & retirement question with figures that apply to you. Estimate a target portfolio from annual spending and a withdrawal rate you choose. Estimate a target portfolio from annual spending and a withdrawal rate you choose. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context. Use a clear fire calculator scenario with values you can verify before relying on the result. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
What changes the result?
The stated method is: Target portfolio = annual spending ÷ assumed withdrawal rate. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
When checking the answer
Withdrawal rates, taxes, inflation, lifespan, returns, and market losses are uncertain and personal. This is not investment advice or a guarantee that a portfolio will last.
Quick verification checklist
- • Confirm the date and unit of every input.
- • Replace defaults with values that match your case.
- • Compare the answer with a second scenario.
- • Use the official source for regulated or high-impact decisions.
Method and update
Last reviewed: 2026-08-10. This tool performs the stated formula locally in your browser using the values you enter.
Frequently asked questions
Is FIRE Number Calculator free to use?
Yes. This calculator runs in your browser and does not require an account.
Is the result guaranteed?
Withdrawal rates, taxes, inflation, lifespan, returns, and market losses are uncertain and personal.
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