How to Retire Early: The FIRE Movement Guide

FIRE stands for Financial Independence, Retire Early. It's a movement of people saving 50-70% of their income to retire decades early. Here's how it works.

The Core Formula

The 4% rule says you can safely withdraw 4% of your investment portfolio each year without running out of money. Your "FIRE number" is 25 times your annual expenses. If you spend $40,000/year, you need $1,000,000 invested.

Use our Investment Calculator to see how long it takes to reach your FIRE number.

Savings Rate Determines Everything

Your savings rate is the most important factor. Here's how savings rate affects time to retirement (assuming 7% returns):

• 10% savings → ~51 years to retirement
• 25% savings → ~32 years
• 50% savings → ~17 years
• 65% savings → ~10 years
• 75% savings → ~7 years

Every dollar saved is a dollar that can earn returns. Every dollar spent costs you much more than its face value — it's money that could have grown into retirement income.

Lean FIRE, Fat FIRE, and Coast FIRE

Lean FIRE: Retire early with a minimalist lifestyle. Annual expenses under $30,000. FIRE number under $750,000. Best for single people without expensive tastes.

Fat FIRE: Retire early with a comfortable lifestyle. Annual expenses $60,000+. FIRE number $1.5M+. More common for couples or high earners.

Coast FIRE: Save enough early that your investments will grow to your FIRE number by normal retirement age without additional contributions. Then take a lower-paying, less stressful job to cover current expenses.

Barista FIRE: Save enough to cover most expenses, then work part-time for the rest. Combines early semi-retirement with health insurance and social connection.

Investment Strategy

FIRE investors typically use a simple, low-cost approach: 100% in low-cost index funds during accumulation, shifting to 60-80% stocks / 20-40% bonds in retirement. Tax-advantaged accounts first: 401(k) to employer match, then Roth IRA, then max 401(k), then taxable brokerage.

Income During Retirement

Before age 59.5, you can't access retirement accounts without penalty (with exceptions like Roth IRA contributions and SEPP withdrawals). FIRE practitioners build a "bridge" using: taxable brokerage accounts, Roth IRA contributions (can withdraw anytime), rental income, side hustles, or part-time work.

The Biggest Challenges

• Healthcare costs before Medicare (the #1 concern)
• Sequence of returns risk (market downturn right after retiring)
• Inflation eating into fixed withdrawals
• Psychological adjustment to not working
• Unexpected large expenses

Getting Started

Track your expenses ruthlessly. Cut fixed costs first (housing, transportation). Boost your income (side hustles, career advancement). Invest every extra dollar in low-cost index funds. Automate everything. The key isn't deprivation — it's intentional spending on what matters and cutting waste.