Lean vs Fat FIRE
Compare all three FIRE variants side-by-side to find the target that fits your life.
Lean vs Fat FIRE Calculator
The Lean vs Fat FIRE Calculator lets users compare three distinct retirement targets: Lean FIRE (bare-bones frugal), Barista FIRE (the middle path), and Fat FIRE (full lifestyle freedom), all side by side. Enter your current age, savings, annual savings rate, and expected return, then dial in your Lean and Fat expense levels. The calculator auto-derives Barista as the midpoint, computes each FIRE number using the 4% rule, projects how many years and what age you'd hit each target, and renders a portfolio growth chart showing all three finish lines at once. The comparison table at the bottom distills everything into a clean four-column view covering annual spend, target number, FIRE age, and monthly income, so users can instantly see the tradeoff between retiring sooner on less versus working a bit longer for a fuller lifestyle.