FIRE Calculator
FIRE Number
$1,375,000
(4% rule)Years to FIRE
10.2
at target age 55Monthly Income
$4,583
(in today's $)Projected Portfolio Growth
Detailed FIRE Projections
| Metric | Value | Notes |
|---|---|---|
| FIRE Number | $1,375,000 | Total savings needed |
| Years to FIRE | 10.2 | At current savings rate |
| Monthly Retirement Income | $4,583 | Based on withdrawal rate |
| Annual Withdrawal Amount | $55,000 | 4.0% of FIRE number |
| Projected Savings at Retirement | $1,425,000 | In today's dollars |
| Annual Savings Rate | 38.9% | Of gross income |
How the FIRE Retirement Calculator Works
FIRE (Financial Independence, Retire Early) is about saving aggressively to reach a point where your investments generate enough to cover your living expenses forever. The core formula is simple:
FIRE Number = Annual Expenses / Safe Withdrawal Rate
The classic 4% rule (from the Trinity study) suggests you can withdraw 4% of your portfolio annually, adjusted for inflation, with low risk of depletion over 30 years. Our calculator uses this rule but allows you to adjust the withdrawal rate based on your risk tolerance.
Compound growth bridges the gap from your current savings to your FIRE number. We project your portfolio year by year using the expected return (minus inflation to show real growth). The chart above displays that trajectory until your target retirement age.
Example: If you spend $50,000/year and use a 4% withdrawal rate, you need $1,250,000. Starting with $250k, saving $35k/year (income minus expenses) at 7% return, you'll reach FIRE in about 16 years.
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Frequently Asked Questions
1. What is FIRE retirement?
FIRE stands for Financial Independence, Retire Early. It's a movement focused on extreme saving and investing to retire far earlier than traditional retirement ages (often in your 40s or 50s).
2. How accurate is a FIRE calculator?
FIRE calculators provide estimates based on historical averages and assumptions. Actual market returns, sequence of returns risk, and inflation can change outcomes. Use them as a guide, not a guarantee.
3. What withdrawal rate is safe?
The 4% rule is a common benchmark. However, many recommend 3-3.5% for longer retirement horizons (50+ years) or if you want a higher margin of safety.
4. How much savings do I need for FIRE?
Multiply your annual expenses by 25 (using 4% rule). For $40k/year expenses, you need $1M. Adjust based on your withdrawal rate and expected investment returns.
5. How does inflation affect retirement planning?
Inflation erodes purchasing power. Our calculator uses real returns (return minus inflation) to project growth in today's dollars, giving you a clearer picture.