FIRE Calculator

Use our free FIRE calculator to determine your Financial Independence Retire Early number. Based on the 4% rule, find out how much you need to save and at what age you can achieve financial independence.

Financial

Currency

Current Age

years

Current Savings

Monthly Contribution

Expected Annual Return (%)

Annual Expenses in Retirement

Formula

The FIRE (Financial Independence, Retire Early) movement focuses on saving aggressively to reach a point where your investments generate enough passive income to cover your living expenses. This calculator uses the 4% rule to determine your FIRE number.

FIRE Number = Annual Expenses × 25 (4% Rule)

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter your current age and current savings.
2Input your monthly contributions and expected annual return.
3Enter your estimated annual expenses in retirement.
4Your FIRE number is calculated as 25 times your annual expenses (4% rule).
5See how many years until you reach FIRE and at what age.

Examples

30 years old, $100k savings, $2k/month, 7% return, $40k annual expenses

1.FIRE Number = $40,000 × 25 = $1,000,000
2.Monthly rate = 7%/12 = 0.583%
3.Solve for years to reach $1M

Result: $1,000,000

Frequently Asked Questions

The 4% rule suggests you can withdraw 4% of your portfolio annually in retirement without running out of money for 30 years. Your FIRE number is annual expenses divided by 4% (×25).

Lean FIRE means living frugally with a smaller portfolio (e.g., $500k-$800k). Fat FIRE means maintaining a higher lifestyle with a larger portfolio ($2M+). Choose based on your desired retirement lifestyle.

The 4% rule is based on historical US market data. Many experts now recommend 3-4% depending on market conditions, portfolio allocation, and retirement length. Consider it a starting point.

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FIRE Movement Explained

CalculateMe Team

Last updated: 2026-07-16

Frequently Asked Questions

The 4% rule suggests you can withdraw 4% of your portfolio annually in retirement without running out of money for 30 years. Your FIRE number is annual expenses divided by 4% (×25).

The 4% rule is based on historical US market data. Many experts now recommend 3-4% depending on market conditions, portfolio allocation, and retirement length. Consider it a starting point.

FIRE Calculator

Formula

How It Works

Examples

30 years old, $100k savings, $2k/month, 7% return, $40k annual expenses

Frequently Asked Questions

What is the 4% rule?

What is a lean FIRE vs fat FIRE?

Is the 4% rule still valid?

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FIRE Calculator

Formula

How It Works

Examples

30 years old, $100k savings, $2k/month, 7% return, $40k annual expenses

Frequently Asked Questions

What is the 4% rule?

What is a lean FIRE vs fat FIRE?

Is the 4% rule still valid?

Related Calculators

Related Articles