FIRE & Compound Interest Calculator
Project your path to financial independence with year-by-year compound growth and a FIRE target number based on the 4% rule.
Your Financial Profile
FIRE Target Number
$1,000,000
Annual expenses ÷ withdrawal rate
Projected Net Worth at Retirement
$2,192,685
At target retirement age
Years to Financial Independence
16
Age at FI: 46
Wealth Accumulation vs. FIRE Target
Exceeds target — you reach FI before retirement ageHow the FIRE Calculator Works
The FIRE (Financial Independence, Retire Early) calculator projects your year-by-year compound growth from current savings and monthly contributions, then compares your projected net worth at your target retirement age against your FIRE target number. The FIRE target is calculated as your annual retirement expenses divided by your safe withdrawal rate (typically 4%).
FIRE Formulas
The 4% Rule and the Trinity Study
The 4% rule is a widely cited guideline from the Trinity Study, which found that a portfolio of stocks and bonds could sustain annual withdrawals of 4% of the initial balance for 30 years with high probability.
The 4% Safe Withdrawal Rate
Withdraw 4% of your portfolio in the first year of retirement, then adjust for inflation each subsequent year. This gives you a high probability of your portfolio lasting 30+ years.
The Trinity Study
The Trinity Study (1998) tested various withdrawal rates against historical market returns. It found that 3-4% withdrawal rates from a stock-bond portfolio survived 30+ years in nearly all historical scenarios.