What Is Coast FIRE?
Coast FIRE (Financial Independence, Retire Early) is a personal finance strategy where you accumulate enough savings early in life so that—even if you never contribute another dollar to your retirement accounts—the power of compound interest alone will grow your nest egg to your full retirement target by traditional retirement age. In other words, you reach a point where your existing investments "coast" to retirement on their own. This frees you to reduce working hours, switch to a lower-paying but more fulfilling career, start a business, or simply spend more time with family—all without jeopardizing your long-term financial security.
The concept was popularized by the FIRE community, which emphasizes aggressive saving (50-70% of income), low-cost index fund investing, and mindful spending. Unlike traditional FIRE—which requires saving until you have 25x your annual expenses—Coast FIRE lets you stop contributing much earlier because time does the heavy lifting through compound growth. For example, a 30-year-old with $100,000 invested at a 7% real return would have approximately $761,000 by age 60 without adding a single additional dollar. That is the magic of Coast FIRE.
FIRE Strategies Explained
Lean FIRE
Lean FIRE targets financial independence on a minimal annual budget—typically $25,000 to $40,000 per year for a single person. Lean FIRE practitioners embrace frugality, minimalism, and intentional living. They often use strategies like geo-arbitrage (moving to lower-cost areas), house hacking, and DIY approaches to keep expenses low. The advantage: you can reach FIRE much faster because your target number is smaller. The trade-off: less financial buffer for unexpected expenses like medical emergencies or market downturns.
Fat FIRE
Fat FIRE is the opposite—retiring early with a comfortable, abundant lifestyle. Fat FIRE targets typically range from $100,000 to $250,000+ in annual spending, requiring a nest egg of $2.5 million to $6+ million. This path appeals to high-income earners (tech, medicine, law, finance) who want to maintain their lifestyle in retirement without cutting back. The advantage: total financial peace of mind and lifestyle freedom. The trade-off: it takes significantly longer to accumulate the required capital.
Barista FIRE
Barista FIRE is a hybrid strategy: you save enough that your investments cover most of your basic living expenses, then work part-time (like a barista) to cover the remaining gap and—crucially—to maintain health insurance and other benefits. The name comes from Starbucks offering health insurance to part-time employees. This approach is practical for those who enjoy working but want more freedom, or who want to bridge the gap between Coast FIRE and full FIRE without fully retiring.
The 4% Rule (Safe Withdrawal Rate)
Introduced in the landmark 1994 "Trinity Study" by Professors Cooley, Hubbard, and Walz, the 4% rule states that retirees can safely withdraw 4% of their portfolio in the first year of retirement, then adjust that dollar amount for inflation each subsequent year, with a high probability (95%+) of not running out of money over a 30-year retirement. This means your FIRE number = annual expenses x 25. While the rule was developed for traditional 30-year retirements, many in the FIRE community use a more conservative 3-3.5% rate for 40-50+ year early retirement horizons.
Educational Blog & Resources
Our blog covers in-depth personal finance topics: compound interest explained with real-world examples, tax-efficient withdrawal strategies for early retirees, geographic arbitrage for lowering your FIRE number, the psychology of frugal living, comparing index funds vs. real estate for FIRE, and detailed case studies of people who achieved FIRE in their 30s and 40s. Each article is written to be accessible to beginners while providing enough depth for experienced FIRE enthusiasts. We update the blog regularly with new content based on community questions and the latest personal finance research.
