FIRE Calculator
Calculate your FIRE number and find out when you can retire early based on savings rate and investments.
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Last updated: March 2026
Your Financial Profile
You Can Retire At Age
44
14 years from now
FIRE Number
$1,250,000
Lean FIRE
$875,000
Fat FIRE
$1,625,000
Coast FIRE Age
32
Savings Rate
50%
Annual Savings
$50,000
Disclaimer: This calculator provides estimates for educational purposes only. It does not constitute financial or tax advice. Consult a qualified professional.
Financial Disclaimer
This calculator is for informational and educational purposes only. Results are estimates and do not constitute financial advice. Actual figures depend on your specific circumstances, lender terms, and market conditions. Consult a qualified financial advisor before making financial decisions. See full disclaimer.
What is FIRE (Financial Independence, Retire Early)?
FIRE stands for Financial Independence, Retire Early — a personal finance movement centered on aggressive saving and investing to accumulate enough wealth to live off investment returns indefinitely, often decades before traditional retirement age. The movement gained mainstream attention in the 2010s through blogs, books, and communities built around the idea that freedom from mandatory employment is achievable through disciplined financial choices rather than waiting until age 65.
The FIRE number is the portfolio size needed to sustain retirement indefinitely. It is derived from the 4% withdrawal rule (also called the Safe Withdrawal Rate), which originated from the Trinity Study (1998) and subsequent research showing that a 4% annual withdrawal from a diversified stock and bond portfolio had a 95%+ probability of lasting 30 years across historical market conditions. Your FIRE number = Annual Expenses ÷ 0.04 (or Annual Expenses × 25). Someone spending $50,000/year needs $1,250,000 invested to retire under the standard FIRE framework.
The FIRE community has evolved into several variants: Lean FIRE (minimum lifestyle, smaller portfolio — typically 20–25x expenses), Fat FIRE (comfortable lifestyle, larger portfolio — often 30–40x expenses), Barista FIRE (partial retirement with part-time work to cover health insurance and lifestyle expenses), and Coast FIRE (accumulating enough to stop contributing while letting compound growth carry you to traditional retirement). This calculator helps you find all these key milestones.
How to Use This Calculator
- Enter your current age, annual income, annual expenses, and current investment portfolio value.
- Set your expected annual return — 7% is commonly used (approximately the long-run real return of a diversified US stock portfolio after inflation).
- Review your FIRE retirement age and years to FIRE calculated from your current trajectory.
- Check the four FIRE variants: your standard FIRE number (25x expenses), Lean FIRE (20x), Fat FIRE (40x), and your Coast FIRE age.
- Note your current savings rate — this is the single most powerful lever in accelerating your FIRE date.
- Experiment with different annual expense levels to see how reducing spending by $5,000–$10,000/year compresses your FIRE timeline.
Financial Planning Tips
- The 4% withdrawal rule provides a useful benchmark, but plan conservatively for early retirees with 40+ year horizons — a 3–3.5% withdrawal rate significantly increases portfolio survival probability.
- Savings rate is the most powerful variable in the FIRE equation: moving from a 20% to a 50% savings rate can cut your working years in half, while investment returns have a smaller impact on the timeline.
- Tax-advantaged accounts (401(k), IRA, Roth IRA, HSA) dramatically accelerate wealth accumulation — maximize these before investing in taxable brokerage accounts.
- Healthcare costs are often the largest unexpected expense in early retirement — model for $1,000–$2,000/month per household in healthcare premiums and out-of-pocket costs prior to Medicare eligibility at age 65.
- Geographic arbitrage (moving to a lower cost-of-living area or country) is one of the most effective strategies for reducing the annual expenses that determine your FIRE number.
- The compound interest formula A = P(1 + r)^t shows how starting early dramatically multiplies outcomes: $100,000 invested at age 30 at 7% grows to $1.07M by age 65, while the same amount invested at 40 only grows to $543K.
FAQ
What is the 4% rule?
The 4% rule states that you can withdraw 4% of your initial portfolio value annually (adjusted for inflation each year) with a high probability that your portfolio will last 30+ years. It derives from the Trinity Study's analysis of historical stock and bond returns from 1926–1995. For longer retirements (40–50 years, common for early retirees), many financial planners recommend a 3–3.5% rate for greater safety.
What is Coast FIRE?
Coast FIRE is the point at which your existing portfolio, if left untouched, will grow to your full FIRE number by traditional retirement age (65) without any additional contributions. At Coast FIRE, you only need to earn enough to cover current living expenses — no additional savings required — while your investments compound toward full retirement on their own.
What savings rate do I need to retire early?
A savings rate of 50% can achieve FIRE in approximately 17 years, 60% in 12 years, and 70% in 8 years — assuming a 7% annual return. Traditional retirement with a 15–20% savings rate takes 35–40 years. The math is stark: your savings rate, not your income level, is the primary determinant of how quickly you reach financial independence.
Is the 7% expected return realistic?
The US stock market (S&P 500) has delivered approximately 10% nominal or 7% real (inflation-adjusted) returns annually over long historical periods. Future returns may differ from historical averages, and volatility means there will be years of significant gains and losses. Using 6–7% is a reasonable conservative assumption for long-term planning in a diversified index fund portfolio.
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