Example result based on the prefilled values.
FIRE Number
$1,250,000.00
Years to FIRE
22.00
FIRE Age
52.00
Savings Rate
30.00%
Current Progress
0.00%
Continue your plan
Useful next calculations
When to use this calculator
- Before choosing between saving, investing, or increasing your monthly contribution.
- When you want to compare best-case, base-case, and cautious return assumptions.
- When you need a quick projection before making a longer-term portfolio decision.
- When you are deciding how many more years of contributions are needed to reach a specific target balance.
- When you want to see whether starting earlier versus contributing more each month produces a bigger outcome.
A realistic US planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Your Current Age
35
Current Savings & Investments ($)
$15,000
Annual Income ($)
$55,000
Annual Expenses ($)
50000
After entering these figures, review fire number, years to fire and fire age together rather than in isolation — each metric tells a different part of the story. Then rerun the tool with one input adjusted to see which variable has the biggest effect on all three outputs before you settle on a plan.
How to read your results
FIRE Number
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Years to FIRE
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
FIRE Age
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Savings Rate
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Current Progress
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Method & assumptionsAuthoritative sources
This calculator models your path to Financial Independence, Retire Early (FIRE) using a year-by-year compound growth simulation. Starting from your current savings balance, it adds your annual savings each year and applies your expected investment return until your portfolio reaches your FIRE number — defined as annual expenses divided by your safe withdrawal rate. The widely cited 4% rule, derived from the Trinity Study using historical US stock and bond data, suggests that a 25x expenses portfolio has historically survived 30-plus-year retirements. Many early retirees in the US choose a lower rate of 3% to 3.5% given longer time horizons and healthcare costs before Medicare eligibility at age 65.
The calculator does not account for taxes on investment withdrawals, inflation eroding purchasing power, Social Security income, or variable market returns. A 7% default return reflects approximate long-run US equity market performance after inflation. Your actual savings rate is calculated as annual savings divided by gross income, expressed as a percentage. Because this tool assumes a constant growth rate, real-world outcomes will vary — sequence-of-returns risk means that poor returns early in retirement can significantly shorten portfolio longevity even if long-run averages hold.
Common mistakes
- !Using an assumption that is not supported by a current local quote, bill, statement or official source.
- !Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- !Mixing monthly and annual inputs without converting them consistently.
- !Forgetting location-specific taxes, fees, eligibility rules or payroll deductions where they apply.
- !Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.
- Use the result to prepare better questions for a lender, provider, adviser or employer rather than treating it as a final answer.
Frequently asked
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