FIRE stands for Financial Independence, Retire Early. The goal is to save and invest aggressively enough that your investment income covers your living expenses — at which point work becomes optional, often decades before the traditional retirement age of 65.
The Core Math of FIRE
The 4% rule: You can withdraw 4% of your portfolio annually without running out of money over a 30-year retirement (based on historical market returns). This means a $1 million portfolio supports $40,000 per year in expenses.
Your FIRE number: Your target portfolio is 25x your annual spending. Spend $50,000/year? You need $1.25 million. Spend $30,000/year? You need $750,000.
FIRE Variations
- LeanFIRE: Retire with a minimalist lifestyle and a smaller portfolio (often $500,000–$750,000). Requires very low annual spending.
- FatFIRE: Retire with a larger portfolio ($2.5M+) that supports a higher spending lifestyle.
- BaristaFIRE: Reach semi-financial independence, then work a part-time job to cover some expenses while your investments grow.
- CoastFIRE: Save enough early that compound growth alone will reach your FIRE number by traditional retirement age — without additional contributions.
How People Achieve FIRE
The common formula: earn more, spend less, invest the difference aggressively. Typical FIRE practitioners save 40–70% of their income, invest heavily in low-cost index funds, minimize housing and transportation costs, and often pursue high-income careers.
Tax Strategy Is Critical for FIRE
Maximizing tax-advantaged accounts (401(k), IRA, HSA) reduces your taxable income during accumulation. A common FIRE tax strategy is the Roth conversion ladder — converting Traditional IRA funds to Roth over time to access them penalty-free before age 59.5.
The Criticisms of FIRE
- Requires a high income or extreme frugality that isn’t accessible to everyone
- The 4% rule was designed for 30-year retirements; early retirees may need 3–3.5%
- Healthcare before Medicare eligibility (age 65) is a major expense
- Sequence-of-returns risk: retiring just before a market crash can derail a FIRE plan
Is FIRE Right for You?
You don’t have to go all-in on FIRE to benefit from its principles. Saving more, spending intentionally, and investing in low-cost index funds will improve your financial position regardless of whether you retire at 35 or 65. The FIRE movement’s real contribution is making people aware that traditional retirement at 65 isn’t the only option.