What is the 4% Rule for FIRE?
The 4% rule is a retirement withdrawal strategy that states you can safely withdraw 4% of your portfolio in the first year of retirement, then adjust that amount for inflation each subsequent year, and your money should last 30 years.
To calculate your FIRE number: Multiply your annual expenses by 25 (or divide by 0.04).
Example:
If you need $60,000/year to live: $60,000 ร 25 = $1,500,000 FIRE number
This means you need $1.5 million saved to safely withdraw $60,000/year (4%) adjusted for inflation.
Our calculator automatically calculates your FIRE number, Lean FIRE (70% of target), Fat FIRE (150% of target), Coast FIRE, and Barista FIRE based on your inputs.
FIRE Intelligence
Early retirement modeling based on the 4% safe withdrawal rule.
Total Freedom Goal
$1,500,000
Current Vitals
Future Assumptions
Monte Carlo Simulation
1,000 scenarios with market volatility
Geographic Arbitrage
100 = US average. Lower = cheaper area
Lower COL = lower FIRE number needed
๐ฐ Annual Savings: $12,000
Moving to 80 COL reduces your FIRE number by $300,000
Barista FIRE
Income from part-time work, side hustle, or passive income
โ Barista FIRE Age: 41
You can retire with part-time income at age 41 with $700,000 saved
Independence Age
48
Lean FIRE Age
45
Barista FIRE Age
41
Coast FIRE Status
Not Yet
Need $101,452
Monthly Yield
$5,000
Wealth Accrual vs Target
Gemini Strategic Freedom Advice
Analyzing your contribution velocity for early crossover potential...
Financial Philosophy
The Mechanics of Financial Independence
FIRE is not just about quitting your job; it's about shifting from selling your time for money to letting your money buy back your time.
The 4% Rule
Originating from the Trinity Study, the 4% Rule suggests that if you withdraw 4% of your initial portfolio value in the first year of retirement (and adjust for inflation thereafter), your money has a high probability of lasting 30+ years.
Savings Rate is King
While market returns matter, your Savings Rate (percentage of income saved) is the biggest driver of FIRE. A 50% savings rate means you earn 1 year of freedom for every 1 year worked.
Lean vs. Fat FIRE
Lean FIRE covers basic necessities (minimalism). Fat FIRE accounts for a more luxurious lifestyle. Determining which path you want dictates your "Freedom Number."
Sequence of Returns Risk
The biggest threat to a FIRE plan is a market crash in the first few years of retirement. This tool assumes a steady return, but in reality, volatility can impact your withdrawal strategy. Diversification into bonds or cash buffers is recommended as you approach your target age.
Standard FIRE
25x Expenses
Ultra Safe
33x Expenses
Calculated Logic
We use a compound growth algorithm. Monthly contributions are added to the balance, and interest is compounded monthly. The "Freedom Number" is calculated by dividing your annual expenses by your safe withdrawal rate.
How to use
Be honest about your "Annual Lifestyle Cost." It should include taxes, health insurance, and travelโnot just your current rent. Adjust the SWR to 3% for a more conservative, multi-generational plan.
Expert Tips
- โข Use HSA accounts to lower taxable income
- โข Focus on gross savings rate > 30%
- โข AI Triage: Check your advice for "Coast" targets
Related Resources
Frequently Asked Questions
What is FIRE and how do I calculate my FIRE number?
FIRE (Financial Independence Retire Early) is achieving financial independence to retire decades earlier than traditional retirement age. Your FIRE number = Annual Expenses ร 25 (based on the 4% rule). For example, if you spend $60,000/year, you need $1,500,000 saved. Use our calculator above to find your exact FIRE number and timeline.
What's the difference between Lean FIRE, Regular FIRE, and Fat FIRE?
Lean FIRE = 70% of your target (minimalist lifestyle, $25k-$40k/year expenses). Regular FIRE = 100% of target (comfortable lifestyle, $40k-$100k/year). Fat FIRE = 150% of target (luxury lifestyle, $100k+/year expenses). Our calculator shows when you'll reach each milestone.
What is Coast FIRE?
Coast FIRE means you have enough saved that it will grow to your full FIRE number by traditional retirement age (65) without any more contributions. You can 'coast' - work less, take lower-paying but more enjoyable jobs, or take extended breaks. Our calculator shows if you've reached Coast FIRE.
What is Barista FIRE?
Barista FIRE is when your savings + part-time income (like working at a coffee shop) covers your expenses. You need less saved because part-time work fills the gap. For example, if you need $60k/year and earn $20k part-time, you only need $1,000,000 saved (25x the $40k gap). Our calculator shows your Barista FIRE age.
Is the 4% rule safe for early retirement?
The 4% rule was designed for 30-year retirements. For early retirees (under 50), many experts recommend 3-3.5% for longer retirement periods. However, 4% remains a solid starting point. Our calculator lets you adjust the withdrawal rate to see the impact on your FIRE number.
How does geographic arbitrage help with FIRE?
Geographic arbitrage means moving to a lower cost-of-living area to reduce expenses and your FIRE number. For example, moving from San Francisco (COL 150) to Austin (COL 100) can reduce your FIRE number by 33%. Our calculator shows how adjusting COL affects your FIRE timeline.
What savings rate do I need to reach FIRE?
Higher savings rates = faster FIRE. At 50% savings rate, you can reach FIRE in ~17 years. At 65%, it's ~10.5 years. At 75%, it's ~7 years. The key is maximizing income and minimizing expenses. Our calculator shows your timeline based on your current savings rate.
Should I pay off debt or invest for FIRE?
Generally, if your debt interest rate is higher than expected investment returns (7-8%), pay off debt first. If debt rate is lower, invest for FIRE while making minimum payments. High-interest credit card debt should always be paid off first. Use our 'Should I Pay Off Debt or Invest' calculator to see the math.