FIRE Number Calculator
Calculate your Financial Independence, Retire Early (FIRE) number and how many years it will take to get there. Enter your expenses, savings, and investment return to find your path to financial freedom.
The FIRE movement (Financial Independence, Retire Early) is built around the concept that by saving aggressively and investing wisely, you can accumulate enough wealth to live off investment returns indefinitely. Your FIRE number is the portfolio size that generates enough passive income to cover your annual expenses.
The standard formula is: FIRE Number = Annual Expenses / Withdrawal Rate. At the commonly used 4% withdrawal rate, you need 25 times your annual expenses. If you spend $50,000/year, your FIRE number is $1,250,000.
The savings rate is the single most important factor in how quickly you reach FIRE. Someone saving 20% of income might take 37 years, while someone saving 50% could reach FIRE in about 17 years. Saving 70% reduces the timeline to roughly 8 years. This is because a high savings rate both increases the amount invested and demonstrates that you can live on less, reducing your FIRE number.