FIRE Number Calculator
Calculate how much you need to save to achieve financial independence and retire early. Your FIRE number is the investment portfolio size that can sustain your lifestyle indefinitely.
Your Numbers
Adjust the inputs to see how they affect your FIRE timeline.
Your yearly spending in retirement
The 4% rule is a common starting point
Total invested assets today
How much you save per year
Historical S&P 500 average: ~10% nominal, ~7% real
FIRE Number
$1.00M
Years to FIRE
19y 3m
Jul 2045
Monthly Savings
$1,665
to stay on track
Progress
5%
of FIRE number
Portfolio Growth Projection
What is a FIRE Number?
Your FIRE number is the amount of money you need invested to generate enough passive income to cover your annual expenses indefinitely. It is calculated by dividing your annual expenses by your withdrawal rate.
How is the FIRE Number Calculated?
The formula is straightforward: FIRE Number = Annual Expenses / Withdrawal Rate. For example, if you spend $40,000 per year and use a 4% withdrawal rate, your FIRE number is $1,000,000. This is based on the Trinity Study, which found that a 4% withdrawal rate has historically sustained portfolios for 30+ years.
Tips to Reach FIRE Faster
- Reduce your annual expenses to lower your FIRE number
- Increase your savings rate to accumulate wealth faster
- Invest consistently in low-cost index funds
- Consider geographic arbitrage to reduce living costs
- Build additional income streams to boost contributions