Retire Early on Less

Lean FIRE is a path to early retirement built on frugality and intentional minimalism. The 'lean' refers to living on a below-average budget in retirement — typically $25,000 to $40,000 per year for a single person or couple. Because the target spending is lower, the required portfolio is smaller, making Lean FIRE achievable much earlier than traditional or Fat FIRE. It appeals to people who value time and freedom over material consumption, and who are comfortable with geographic flexibility (such as living in a low cost-of-living city or country), simple pleasures, and a DIY lifestyle.

Yes — for people who design their life around it deliberately. Many Lean FIRE retirees own their home outright (eliminating rent/mortgage), live in low cost-of-living areas, use public healthcare options or are covered by a spouse, and have simple tastes. The biggest risks are healthcare costs (especially in the US before Medicare eligibility at 65), unexpected major expenses, and lifestyle creep. A common strategy is to maintain some part-time or freelance income in early retirement as a buffer, sometimes called 'Barista FIRE.' Lean FIRE works best when you've designed a life you genuinely love living cheaply, not just cut expenses out of desperation.

Using the standard 25x rule (4% safe withdrawal rate), a Lean FIRE number for $35,000/year spending is $875,000. For $40,000/year it's $1,000,000. For $25,000/year it's $625,000. These are significantly lower than standard FIRE targets (which often exceed $1.5M–$2M) and Fat FIRE targets ($3M+). The exact number depends on your target spending, which varies widely based on location, housing situation, health needs, and personal preferences.

Living on $40,000/year in retirement is very achievable with the right setup: own your home free and clear (eliminating $15,000–$25,000/year in rent/mortgage), cook most meals at home, drive older paid-off vehicles or go car-free, leverage free or low-cost entertainment (hiking, libraries, community events), travel slowly rather than booking expensive resorts, and consider relocating to a lower cost-of-living area — including internationally. Healthcare is the biggest wildcard in the US; many Lean FIRE retirees use the ACA marketplace with income-based subsidies or move abroad where healthcare is far cheaper. The key is designing a rich, fulfilling life that simply doesn't require a lot of spending.

Lean FIRE and Coast FIRE are different types of milestones. Lean FIRE is a full retirement target: you've saved enough to stop working entirely and live on your portfolio indefinitely. Coast FIRE is an intermediate milestone: you've saved enough that your investments will grow to fund retirement on their own — but you still need to work (or earn) enough to cover current expenses. Coast FIRE is often reached a decade or more before Lean FIRE. Many people hit Coast FIRE first, enjoy the reduced financial pressure, then continue saving at a comfortable pace toward their Lean FIRE number.