Field Guides
The calculator answers when. These guides answer why — the assumptions behind the numbers, the trade-offs between flavours of FIRE, and what the target looks like at different ages and in different households.
Want to skip ahead? Run your own numbers in the calculator.
Coast FIRE Number by Age: The Full Table
The Coast FIRE number is a moving target. Younger means smaller. Higher spending means larger. Here is the full table — and what each cell actually means.
Coast FIRE for Couples: How to Run the Math Together
Most FIRE calculators model a single person. Real households have two — usually with different incomes, different appetites for risk, and different ideas of what 'enough' means. The math gets richer.
Is 7% a Realistic Stock Market Return Assumption?
Every FIRE calculator hides an assumption about the future. Seven percent is the polite consensus — and a number worth interrogating before you bet a working life on it.
Coast FIRE vs Barista FIRE vs Lean FIRE: How to Choose
Four flavors of financial independence, one decision: how much do you want to keep working, and what for? A compact field guide with the numbers.