FIRE Number Calculator

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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.

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Enter Your Measurements

Results

Your FIRE Number

1,500,000

$

Monthly Passive Income Needed

5,000.00

$

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Formula

FIRE Number = Annual Expenses / Safe Withdrawal Rate Example: $60,000 / 0.04 = $1,500,000

How to Use This Calculator

How to Use

  1. 1

    Estimate your expected annual living expenses in retirement (be honest and thorough).

  2. 2

    Choose a safe withdrawal rate — 4% is the most commonly cited figure from the Trinity Study.

  3. 3

    Your FIRE number is instantly calculated — this is your financial independence target.

Frequently Asked Questions

Frequently Asked Questions

What is the 4% rule?

The 4% rule, derived from the Trinity Study, states that a retiree can withdraw 4% of their portfolio in year one, then adjust for inflation each year, with a high probability of the portfolio lasting 30+ years.

Should I use a lower withdrawal rate?

For early retirees with 40+ year horizons, many FIRE advocates recommend 3% to 3.5% for greater safety. A lower withdrawal rate increases your required FIRE number but provides a larger margin of safety.

Does the FIRE number include Social Security?

Not automatically. If you expect Social Security income, subtract it from your annual expenses before calculating your FIRE number, as it reduces how much your portfolio needs to cover.
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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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