LeanFIRE vs. FatFIRE: Which Lifestyle Can You Afford?
LeanFIRE aims for a minimalist retirement, while FatFIRE aims for a bigger lifestyle. The spending gap between $40k and $100k per year dramatically changes the target portfolio you need.
Model both scenarios
Compare LeanFIRE and FatFIRE spending levels side by side.
LeanFIRE: $40k per year lifestyle
LeanFIRE focuses on low housing costs, minimal travel, and simple living. At $40k/year, the 25x rule suggests a $1.0M portfolio.
FatFIRE: $100k per year lifestyle
FatFIRE assumes more travel, higher housing, and lifestyle upgrades. At $100k/year, the 25x rule points to a $2.5M portfolio.
Why the gap matters
A $60k difference in annual spending equals a $1.5M difference in your FI target. That's why lifestyle choices matter as much as savings rate.
Anand Godar
Financial engineer and founder of QuantCurb. Former fintech data scientist building institutional-grade calculators for everyday wealth decisions.
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