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FIRE Calculator — Financial Independence Retire Early

Calculate your FIRE number and when you can retire early. See how savings rate, investment returns, and expenses determine your financial independence date.

FIRE (Financial Independence, Retire Early) is a movement focused on aggressive saving and investing to retire decades before 65. The core idea: save 50-70% of your income, invest in index funds, and retire when your portfolio reaches 25x your annual expenses (the 4% rule).

Tips for FIRE — Financial Independence Retire Early

1

The 4% rule: you need 25x your annual expenses saved to retire (e.g., $40K expenses = $1M needed)

2

Increasing your savings rate from 20% to 50% can cut decades off your retirement timeline

3

The biggest lever is reducing expenses, not increasing income — every dollar saved is a dollar you don't need to earn returns on

4

Coast FIRE: save aggressively early, then let compound interest do the work while you take a lower-stress job

Frequently Asked Questions

What is the FIRE number?
Your FIRE number = annual expenses × 25. If you spend $40,000/year, your FIRE number is $1,000,000. Once your investment portfolio reaches this amount, you can safely withdraw 4% annually to cover expenses indefinitely.
Is the 4% rule still valid?
The 4% rule (Trinity Study) has held up historically for 30-year periods. For very early retirees (40+ year retirements), many FIRE practitioners use a more conservative 3.5% withdrawal rate or maintain flexible spending.
Last updated: April 2026

Data sources: Standard financial formulas

For informational purposes only. Not financial, medical, or legal advice. Always consult a qualified professional for decisions affecting your finances or health.

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