How this calculator works
Your FIRE number is the portfolio size needed to support annual spending using a withdrawal rate.
FIRE Number = Annual Expenses ÷ Withdrawal Rate
What was added
This version makes the result more intuitive by showing the monthly and annual income that the FIRE number is designed to support.
How to use this calculator
- Enter realistic values that match your current situation.
- Press Calculate to refresh the estimate.
- Compare the main result with the supporting details in the result panel.
- Change one input at a time to see which variable affects the result most.
Planning note: FIRE Number Calculator gives an educational estimate. It does not include every tax rule, fee, platform policy, market condition, or personal constraint, so use it as a quick planning reference rather than a final decision.
FAQ
The 4% rule is a planning shortcut, not a guarantee. Taxes, fees, and market volatility are not included.