FIRE Calculator

Use this free FIRE Calculator to plan your path to Financial Independence and Early Retirement. Enter your income, expenses, and savings rate to calculate your FIRE number, projected retirement date, and Coast FIRE milestone. Powered by historical S&P 500 data — see how different scenarios and market conditions affect your timeline to financial independence.

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Positive amounts add to your investments, negative amounts withdraw. Recurring items are treated as monthly flows.

One-off events Log single cash inflows or expenses that happen in a specific month; use negative amounts for withdrawals.
Recurring income or expenses Track ongoing monthly contributions or bills; they repeat on the schedule you set until their optional end date.
FIRE reach Shows the first month your portfolio is projected to meet or exceed the FIRE number. If it never does, we note the shortfall. —
Portfolio at horizon Portfolio value at the final month of the simulation based on your current plan. —
Required monthly contribution Minimum monthly contribution needed to hit your FIRE number in the target year, given returns and cash-flow events. —
Coast-FIRE Indicates whether compounding alone can reach the FIRE number by the target date without further contributions. —
Retirement withdrawals Summarises cumulative withdrawals taken during retirement along with the average annual amount. —

Progress Towards Your Goal

Current
$0
FIRE Target
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Goal completion Compares your projected portfolio, target-year balance, and Coast-FIRE buffer against the required FIRE number.

Final portfolio vs FIRE target 0%
Target year projection 0%
Coast buffer 0%

Savings rate Measures what share of your monthly income is invested and provides guidance on the strength of that savings rate.

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Savings rate comparison Compares your current savings rate (monthly contribution as % of income) to the required rate needed to reach your FIRE goal on time.

Current 0%
Required 0%

Peak burn rate Highlights the largest projected withdrawal so you can spot stressful periods in the plan.

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Return profile Displays the annualized return, volatility, and inflation assumptions behind this projection.

Nominal annual return Annualized growth rate of the portfolio before accounting for inflation.
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Real annual return Annualized return after subtracting the inflation assumption.
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Annual volatility Standard deviation of annual returns implied by the projection.
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Inflation assumption The inflation rate used to convert nominal projections into real dollars.
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Wealth Sources

Annual Returns Heatmap

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Sharpe Ratio Risk-adjusted return: (Avg Annual Return − Inflation) / Annual Volatility. Higher is better, showing more return per unit of risk.

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Best & Worst Year Highlights the highest and lowest annual returns in your projection to show the range of outcomes.

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Worst —

Portfolio Stability Percentage of months with positive real (inflation-adjusted) returns. Higher means more consistent growth.

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Portfolio Drawdowns

Adjust Inputs
$150K Portfolio
$1,000 Monthly
30 Years

About This FIRE Calculator

This free FIRE Calculator uses historical S&P 500 return data to model your journey to financial independence. Based on the principles of the FIRE movement and research on safe withdrawal rates. Enter your savings, income, and expenses to find your FIRE number and retirement date.