Financial Calculator
FIRE Calculator
Estimate your financial independence number based on annual expenses and withdrawal rate.
Use the FIRE Calculator
Your results
- FIRE number
- $0.00
- Amount still needed
- $0.00
- Estimated years to FIRE
- 0 years
Year-by-Year Projection
How this calculator works
- What it does
- Estimate your financial independence number based on annual expenses and withdrawal rate.
- Inputs used
- The estimate uses annual expenses, withdrawal rate (%), current invested assets, monthly contribution, and expected annual return (%).
- Calculation approach
- The calculator applies the relationships defined for the fire calculator to those inputs and updates fire number, amount still needed, and estimated years to fire.
- How to read the result
- Treat the result as a scenario based on the values entered. Compare a few reasonable inputs and consider costs, taxes, timing, or risks that the calculator does not include.
How to Use This Calculator
- Enter Annual expenses and Withdrawal rate (%) using values that match the scenario you want to evaluate.
- Enter Current invested assets and Monthly contribution using values that match the scenario you want to evaluate.
- Enter Expected annual return (%) using values that match the scenario you want to evaluate.
- Review the assumptions for the fire calculator, especially rates, time periods, and optional amounts.
- Select Calculate to update the results, then adjust one input at a time to compare scenarios.
Understanding the Results
- FIRE number
- The target amount calculated from the spending, rate, or goal assumptions entered above.
- Amount still needed
- The difference between the current position and the calculated target or comparison value.
- Estimated years to FIRE
- The estimated time needed to reach the target under the current contribution, payment, and growth assumptions.
Common Mistakes
- Treating a constant return or withdrawal rate as a guaranteed outcome.
- Leaving out inflation, taxes, fees, healthcare, or irregular retirement expenses.
- Using current spending without considering how expenses may change later.
- Relying on one scenario instead of testing more cautious assumptions.
Worked Example
Example inputs
- Annual expenses
- $48,000
- Withdrawal rate (%)
- 4%
- Current invested assets
- $100,000
- Monthly contribution
- $1,500
- Expected annual return (%)
- 7%
Example results
- FIRE number
- $1,200,000.00
- Amount still needed
- $1,100,000.00
- Estimated years to FIRE
- 20.2 years
With these illustrative inputs, the estimated years to fire is 20.2 years. The timeline is an estimate based on the stated assumptions, not a prediction or guarantee.
Frequently asked questions
What is a FIRE number?
Your FIRE number is the invested portfolio value intended to support your annual expenses through regular withdrawals.
What is the 4% rule in the FIRE Calculator?
The 4% rule is a retirement planning guideline that starts withdrawals at 4% of a portfolio in the first year and adjusts them for inflation later.
Can I use a withdrawal rate other than 4%?
Yes. A lower withdrawal rate produces a larger FIRE number and may provide more flexibility, while a higher rate produces a smaller target with greater risk.
How does investing affect my FIRE timeline?
Investment growth and regular contributions can compound over time, potentially reducing the number of years needed to reach your target.
Is the estimated FIRE timeline guaranteed?
No. The estimate assumes a constant return and contribution. Actual market returns, inflation, expenses, taxes, and contribution changes will affect the timeline.
What does the FIRE Calculator calculate?
Estimate your financial independence number based on annual expenses and withdrawal rate. The result is based only on the inputs and assumptions shown on the page.
How should I interpret the fire number from the FIRE Calculator?
Use it as an estimate for the scenario entered, not as a guarantee or personal recommendation. Test changes to annual expenses, withdrawal rate (%), and current invested assets to see which assumptions have the greatest effect.