Your FIRE number is the total investment portfolio size you need to achieve financial independence and retire early. It's calculated by dividing your expected annual expenses by your chosen safe withdrawal rate — typically 4%. This calculator helps you set a clear savings target for your financial independence journey.
Enter Your Measurements
Results
Your FIRE Number
1,500,000
$
Monthly Passive Income Needed
5,000.00
$
Formula
How to Use This Calculator
How to Use
- 1
Estimate your expected annual living expenses in retirement (be honest and thorough).
- 2
Choose a safe withdrawal rate — 4% is the most commonly cited figure from the Trinity Study.
- 3
Your FIRE number is instantly calculated — this is your financial independence target.
Frequently Asked Questions
Frequently Asked Questions
What is the 4% rule?
Should I use a lower withdrawal rate?
Does the FIRE number include Social Security?
In-Depth Guides
What Is FIRE? How to Calculate Your FIRE Number
Understand the FIRE movement, the 25x rule, safe withdrawal rate, and how to calculate exactly when you can retire early with the 4% strategy.
The 4% Rule: Safe Withdrawal Rate Guide for Retirement
Understand where the 4% rule comes from, when it may be too aggressive or conservative, sequence of returns risk, and flexible withdrawal strategies for retirement.
Coast FIRE Explained: Invest Now, Relax Later
Learn how Coast FIRE works, how to calculate your Coast FIRE number, and why reaching it means you can stop investing and let compounding do the rest.
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About This Calculator
This calculator uses the formula: FIRE Number = Annual Expenses / Safe Withdrawal Rate Example: $60,000 / 0.04 = $1,500,000. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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