Calculate FIRE

Estimate a financial-independence target from annual spending and project when invested savings could reach it.

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ToolFIRE Calculator
Input
Output
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How it works

Annual spending divided by the chosen withdrawal percentage sets the target pot, while income minus spending sets yearly contributions. A future-value equation solves years under a constant real return; the editable 5% return and 4% withdrawal defaults are scenarios, not guarantees or personal advice.

Formula
target pot = annual spending ÷ withdrawal rate
annual saving = annual income − annual spending
  • Real return is already net of inflation, so inflation is not subtracted a second time.
  • At zero return the projection switches to straight-line annual saving.

Worked example

50,000 income, 30,000 spending
Starting with 10,000 already saved
Input
											Annual income: 50000
Annual spending: 30000
Current savings: 10000
Output
												Fire number: 750000
Annual savings: 20000
Savings rate percent: 40
Years to fire: 21.14
Assumed real return percent: 5
Assumed withdrawal rate percent: 4

When to use this

Financial-independence plans, early-retirement scenarios, and pension bridge models compare annual spending, savings rate, real return, and a chosen drawdown assumption.

Edge cases

  • Spending equal to or above income is rejected because annual saving is zero or negative.
  • If current savings already meet the target pot, years to independence is 0.
  • At 0% real return, years are calculated by straight-line saving instead of dividing by the return rate.