What is FIRE?

FIRE stands for Financial Independence, Retire Early. The second half of that name is the part that confuses people. Almost nobody who reaches FIRE stops working — they stop needing to. That's the whole point: work becomes something you choose, on the terms you choose.

The number, in one sentence

You're financially independent when your invested money can cover your yearly spending without you adding to it. That's it. The size of your number is set by how much you spend in a year, not by how much you earn.

Annual spending ÷ your safe withdrawal rate = your freedom number.
At the common 4% rate, that's your annual spending × 25.

Where the 4% comes from

It comes from research on historical market returns showing that a portfolio drawn down at roughly 4% a year, adjusted for inflation, survived a 30-year retirement in almost every historical window. It's a planning starting point, not a law of physics — which is why this tool lets you move it between 3% and 5% and watch your number move with it.

Two levers, not one

Every FIRE plan runs on the gap between what you earn and what you spend. Most of the internet only talks about the spending side. Cutting expenses works, but it has a floor — you can only cut so far before you're just having a worse life. Growing income has no ceiling. Both belong in the plan, which is why your guidance list always shows both.

What FIRE is not

It isn't extreme frugality, it isn't a personality, and it isn't all-or-nothing. Getting halfway to your number already buys you real things: the ability to take the lower-paid job you actually want, to survive a layoff without panic, to take three months off.