FIRE Calculator
FIRE Calculator shows when you can achieve Financial Independence and Retire Early. Enter your income, expenses, and current savings to see your path to financial freedom across Lean, Regular, Fat, and Coast FIRE scenarios.
Your Financial Situation
Compare FIRE Scenarios
Different approaches to financial independence based on your lifestyle goals.
Path to FIRE
Your savings trajectory over time. The horizontal line shows your FIRE number target.
Savings Rate Impact
See how different savings rates affect your timeline to financial independence. Higher savings rates have a compound effect: you save more AND need less.
Year-by-Year Projection
Detailed annual progression toward your FIRE goal.
| Year | Age | Annual Savings | Portfolio Balance | Progress |
|---|
What Is FIRE?
FIRE stands for Financial Independence, Retire Early. It's a strategy focused on aggressive saving and investing to achieve financial freedom decades before traditional retirement age.
The Concept
Build a portfolio large enough that investment returns cover your living expenses indefinitely. This frees you from mandatory employment and gives you control over your time.
The Math
The 4% rule: you can safely withdraw 4% of your portfolio annually. Your FIRE number is 25x your annual expenses. If you spend $40,000/year, you need $1,000,000 invested.
Savings Rate
Your savings rate (percentage of income saved) determines your timeline. A 50% savings rate means reaching FIRE in about 17 years. Higher rates dramatically accelerate the timeline.
Withdrawal Rate
The safe withdrawal rate (typically 4%) determines how much you can spend in retirement without depleting your portfolio. Lower rates provide more security; higher rates increase risk.
Savings Rate vs Years to FIRE
The relationship between savings rate and time to FIRE is non-linear. As you save more, your expenses drop (lowering your FIRE number) while your savings accelerate (growing your portfolio faster).
| Savings Rate | Years to FIRE |
|---|---|
| 10% | 51 years |
| 20% | 37 years |
| 30% | 28 years |
| 40% | 22 years |
| 50% | 17 years |
| 60% | 12.5 years |
| 70% | 8.5 years |
| 75% | 7 years |
Assumes 7% real investment returns (after inflation) and 4% safe withdrawal rate.
Worked Examples
Example 1: The Frugal Engineer
- Income: $100,000/year after tax
- Expenses: $35,000/year
- Savings Rate: 65%
- FIRE Number: $875,000 (25 × $35,000)
- Starting from $0: Reaches FIRE in approximately 11 years at 7% returns
- Result: Can retire in their early 30s with a lean but sustainable lifestyle
Example 2: The Balanced Professional
- Income: $80,000/year after tax
- Expenses: $40,000/year
- Savings Rate: 50%
- FIRE Number: $1,000,000 (25 × $40,000)
- Starting from $50,000: Reaches FIRE in approximately 15 years at 7% returns
- Result: Can retire in their mid-40s with comfortable living standard
Example 3: The Coast FIRE Family
- Income: $120,000/year after tax
- Expenses: $60,000/year
- Current Savings: $200,000 at age 35
- FIRE Number: $1,500,000 (25 × $60,000)
- Coast FIRE Number: $408,000 (enough to grow to $1.5M by age 65 at 7% returns)
- Result: Already past Coast FIRE. Can reduce savings dramatically or switch to lower-stress work while their portfolio grows to full FIRE
Frequently Asked Questions
What is FIRE?
FIRE stands for Financial Independence, Retire Early. It's a movement focused on saving and investing aggressively to retire decades earlier than the traditional retirement age. The goal is to build a portfolio large enough that you can live off the investment returns without working.
What is a FIRE number?
Your FIRE number is the amount of money you need invested to retire. The most common calculation is 25 times your annual expenses (based on the 4% rule). If you spend $40,000 per year, your FIRE number is $1,000,000. At that point, you can safely withdraw 4% annually to cover your expenses indefinitely.
What is the 4% rule?
The 4% rule states that you can safely withdraw 4% of your portfolio each year in retirement without running out of money. Based on historical market returns and inflation, a 4% withdrawal rate has sustained portfolios for 30+ years in backtesting. This translates to needing 25x your annual expenses saved (since 1 / 0.04 = 25).
What savings rate do I need to reach FIRE?
Higher savings rates dramatically reduce time to FIRE. At a 10% savings rate, it takes about 51 years. At 25%, it takes 32 years. At 50%, it takes just 17 years. At 75%, only 7 years. The relationship is non-linear because as you save more, your expenses (and thus your FIRE number) drop while your savings accelerate.
What are the different types of FIRE?
Lean FIRE means retiring with a minimal budget (typically 70-80% of typical expenses). Regular FIRE is based on your current spending level. Fat FIRE means a comfortable lifestyle with extra cushion (130-150% of current expenses). Coast FIRE means you've saved enough that compound growth will reach your FIRE number by traditional retirement age, so you can stop saving and work part-time or lower-stress jobs.
What is Coast FIRE?
Coast FIRE means you've saved enough that your portfolio will grow to your full FIRE number by traditional retirement age (typically 65) without additional contributions. For example, if you're 35 and have saved $250,000, that will grow to approximately $1.9M by age 65 at 7% returns. If your FIRE number is $1.5M, you've reached Coast FIRE and can reduce savings or switch to lower-paying but more fulfilling work.
Does this calculator store my data?
No. All calculations run entirely in your browser. No data is sent to any server, and nothing is stored.
Related Tools
- Compound Interest Calculator — model portfolio growth with contributions
- Savings Goal Calculator — find how long it takes to reach a savings target
- Investment Return Calculator — calculate expected returns
- Net Worth Calculator — track your assets and liabilities
- Retirement Savings Calculator — traditional retirement planning
Privacy & Limitations
- Client-side only. No data is sent to any server. No cookies, no tracking. All calculations run in your browser using JavaScript.
- Assumes constant returns. Real investment returns vary year to year. This calculator uses a constant annual return for projections.
- Does not account for inflation. Use real returns (after inflation) for accurate projections. Historical stock market real returns average 7-8%.
- Does not include taxes. Withdrawals from retirement accounts may be taxable. Consider Roth conversions, tax-loss harvesting, and withdrawal strategies.
- 4% rule is a guideline. It's based on historical data and 30-year retirement periods. Adjust based on your risk tolerance and retirement length.
- Not financial advice. This is an educational tool. Consult a qualified financial advisor for personalized retirement planning.
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FIRE Calculator FAQ
What is FIRE?
FIRE stands for Financial Independence, Retire Early. It's a movement focused on saving and investing aggressively to retire decades earlier than the traditional retirement age. The goal is to build a portfolio large enough that you can live off the investment returns without working.
What is a FIRE number?
Your FIRE number is the amount of money you need invested to retire. The most common calculation is 25 times your annual expenses (based on the 4% rule). If you spend $40,000 per year, your FIRE number is $1,000,000. At that point, you can safely withdraw 4% annually to cover your expenses indefinitely.
What is the 4% rule?
The 4% rule states that you can safely withdraw 4% of your portfolio each year in retirement without running out of money. Based on historical market returns and inflation, a 4% withdrawal rate has sustained portfolios for 30+ years. This translates to needing 25x your annual expenses saved (since 1/0.04 = 25).
What savings rate do I need to reach FIRE?
Higher savings rates dramatically reduce time to FIRE. At a 10% savings rate, it takes about 51 years. At 25%, it takes 32 years. At 50%, it takes just 17 years. At 75%, only 7 years. The relationship is non-linear because as you save more, your expenses (and thus your FIRE number) drop while your savings accelerate.
What are the different types of FIRE?
Lean FIRE means retiring with a minimal budget (typically 70-80% of typical expenses). Regular FIRE is based on your current spending. Fat FIRE means a comfortable lifestyle with extra cushion (130-150% of current expenses). Coast FIRE means you've saved enough that compound growth will reach your FIRE number by traditional retirement age, so you can stop saving and work part-time or lower-stress jobs.
Does this calculator store my data?
No. All calculations run entirely in your browser. No data is sent to any server, and nothing is stored.