FIRE Calculator (Financial Independence, Retire Early)

Calculate your FIRE target number and the years remaining to reach financial independence.

Financial Independence, Retire Early (FIRE) Calculator

Calculate your exact retirement numbers client-side

Wealth Variables

Current Age

Target Age

Current Net Worth ($)

Annual Post-Tax Income ($)

Annual Expenses ($)

Real Return Rate7%

Safe Withdrawal Rate (SWR)4%

Coast FIRE$164,209Target saved today

Lean FIRE$937,500Age 44

Standard FIRE$1,250,000Age 47

Fat FIRE$1,875,000Age 52

Compounding Projection (40 Year Outlook)Savings Rate: 37.5%

How to Use

Input Current Financials

Enter your age, net worth portfolio, and annual expenses.

Set Savings Rate

Specify how much you save and invest annually, along with expected growth rate.

Review FIRE Timeline

See your retirement age, target FIRE net worth, and trajectory charts.

Real-World Examples & Use Cases

Early Retirement Timeline Modeling

Individuals aiming to leave standard employment early use the calculator to determine their target net worth and project the exact number of years needed to reach financial independence based on current savings.

Coast FIRE Planning

Users model Coast FIRE targets — identifying the amount of early investment assets needed so that, without any further additions, compounding alone will fund a traditional retirement by age 60-65.

Lifestyle Inflation Adjustments

Families project how raising or lowering their annual living expenses impacts their retirement timeline, showing that cutting expenses has a double benefit: reducing the target number and increasing savings.

How It Works

FIRE Target and Compounding Growth Formulas: 1. The FIRE Number (4% Rule): The target retirement nest egg is derived from the Trinity Study's Safe Withdrawal Rate (SWR), which concludes that a portfolio has a 95%+ success rate over a 30-year retirement if you withdraw 4% annually (adjusted for inflation). FIRE Number = Annual Expenses × 25 (This is mathematically equivalent to dividing annual expenses by 0.04). 2. Trajectory Projection Formula: Each year, the portfolio growth is modeled using standard compound interest adding annual savings: FV = PV × (1 + r)^t + PMT × (((1 + r)^t - 1) / r) × (1 + r) Where: - FV = Future value of portfolio at year t. - PV = Present portfolio value. - PMT = Annual savings rate. - r = Expected annual investment return rate (adjusted for inflation, typically 6-8%). - t = Years elapsed.

Frequently Asked Questions

What is the 4% rule in FIRE?▼

The 4% rule is a safe withdrawal guidelines stating that you can safely withdraw 4% of your total investment portfolio in the first year of retirement, and then withdraw that same dollar amount adjusted for inflation in subsequent years, with a near-zero risk of running out of money over 30 years.

What are Lean FIRE, Fat FIRE, and Barista FIRE?▼

Lean FIRE is retiring early on a minimalist budget (often under $40,000/year). Fat FIRE is retiring with an abundant lifestyle (often over $100,000/year). Barista FIRE is having enough savings to retire from full-time work but working a part-time job for health benefits or supplementary income. Coast FIRE is having enough saved early in life that you do not need to add more to reach retirement.

Should I include my primary home equity in my FIRE number?▼

Generally, no. Your primary residence does not produce income or yield dividends to pay for groceries or utilities unless you plan to sell it, downsize, or do a reverse mortgage. Only include investable assets (stocks, bonds, real estate rentals, cash) that generate active yield.

How does inflation affect my FIRE calculations?▼

Inflation erodes purchasing power over time. To account for this, you should use a "real" rate of return (e.g., historical stock market return of 9-10% minus 3% inflation = 6-7% real return) in your growth calculations. This keeps the output amounts represented in today's purchasing power.

Disclaimer: The results provided by this calculator are estimates for informational and educational purposes only and do not constitute professional financial advice. Always consult with a qualified financial advisor before making any major financial decisions.

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