Comprehensive Guide to Financial Independence & Early Retirement (FIRE)
Mastering the mathematics of compound interest, portfolio longevity, and safe withdrawal rates.
01. What is the 4% Rule?
Originated from the landmark 1998 Trinity Study, the 4% rule dictates that an investor can safely withdraw 4% of their initial portfolio value in the first year of retirement, adjust that dollar amount annually for inflation, and maintain a 95%+ probability that their capital will last at least 30 years across all historical market cycles.
02. How Compounding Creates Asymmetry
Compound growth is mathematically exponential. In the early stages, your net worth grows primarily via manual savings. After 10 to 15 years, annual market interest begins to surpass your annual contributions. Eventually, the portfolio generates more money while you sleep than you earn from active labor.
Frequently Asked Questions (FAQ)
What is the difference between Lean FIRE, Fat FIRE, and Barista FIRE?
Lean FIRE requires living on a minimalist budget (under $40k/yr). Fat FIRE allows for high-consumption lifestyle ($100k+/yr). Barista FIRE involves saving enough capital to cover core living expenses, while working part-time for health insurance or fun.
Should I factor in inflation?
Yes. The standard historical 7% to 8% return assumption for the US Stock Market (S&P 500) represents the nominal return (~10%) minus average historical inflation (~2-3%).
Is this tool free and private?
100% free and client-side executed. No personal financial data is stored on our servers. Your simulations run natively in your browser.