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FIRE Number = Annual Expenses × 25 (4% rule)
The core calculation is based on:
FIRE Number = Annual Expenses × 25 (4% rule)
Track your actual expenses for 6 months before calculating your FIRE number — most people underestimate by 30-40%.
1. Enter your specific values in the input fields above.
2. The calculator will render instant results as you type.
3. Check the breakdown table for year-by-year projections.
4. Adjust the inputs to see how different scenarios impact the final result.