What is Financial Independence?
Financial independence (FI) means your accumulated wealth generates enough passive income to cover your living expenses indefinitely. The most common benchmark is the 4% rule - if your annual expenses are $40,000, you need $1,000,000 in investments (40,000 / 0.04). This rule is based on the Trinity Study, which found that a 4% initial withdrawal rate adjusted for inflation survived 95% of historical 30-year periods in the US market.
The FIRE Movement
FIRE (Financial Independence, Retire Early) advocates aggressive saving rates of 50-70% of income to achieve FI in 10-15 years rather than the traditional 30-40 years. A household earning $100,000 and saving 50% can potentially reach FI in about 17 years, assuming 7% investment returns. Variations include Lean FIRE (minimal expenses, around $30,000-$40,000 per year), Fat FIRE (comfortable spending above $100,000), and Barista FIRE (part-time work covering some expenses).
Key Considerations
The 4% rule was designed for a 30-year retirement. Early retirees facing 50+ year horizons may need a more conservative 3-3.5% withdrawal rate, requiring a larger nest egg. Healthcare costs before government coverage eligibility can add $10,000-$20,000 annually. Sequence-of-returns risk is the biggest threat - a major market downturn in the first few years of retirement can permanently impair a portfolio even if long-term average returns are adequate.