What is FIRE?
Updated October 21, 2026
FIRE stands for Financial Independence, Retire Early, a lifestyle of saving and investing hard to quit work sooner.
FIRE fans save a big part of their income and invest it, often in index funds.
There are versions like Lean FIRE and Fat FIRE depending on lifestyle.
It needs discipline and time. There's no shortcut to it.
Example
Someone saves half their pay for 12 years and retires at 40.
Questions people ask
What's the 4% rule?
A guideline that you might safely withdraw about 4% of your portfolio a year, though nothing is certain.
Do I need a high income?
It helps, but low spending matters just as much.
Related
Fresh from the site
Work out your own number with the quit your job calculator, or take the passive income quiz.
More questions people ask
What is the FIRE movement?
FIRE stands for Financial Independence, Retire Early. It's an approach where you save and invest a large share of your income so your money can eventually cover your living costs without a job. How much you need depends on your spending and how your investments perform.
How does the FIRE movement help you retire early?
The idea is to save aggressively and invest the difference so your money has time to grow. Once your investments can realistically cover your yearly expenses, you have the option to stop working, though getting there usually takes years of steady saving.
What is the FIRE movement retirement approach?
FIRE retirement works differently from a traditional pension. You build up your own savings and investments until they can cover your expenses, then you decide when, or if, you want to keep working.
What does retirement look like under the FIRE movement?
Retirement under FIRE just means you've saved and invested enough to pay for your life without a regular paycheck. Some people stop working completely, while others cut back to part time or shift to work they actually enjoy.
What's the financial strategy behind the FIRE movement?
The basic strategy is to save a high percentage of your income, keep expenses low, and invest the rest, often in low-cost index funds. Over time that investment pool is meant to grow enough to support your spending, but markets go up and down, so there's no set timeline that works for everyone.
Is there a FIRE movement calculator I can use?
Yes, there are plenty of free FIRE calculators online. You enter things like your savings, monthly expenses, and expected investment growth, and it gives you a rough estimate of when you might reach financial independence. Treat the number as a ballpark figure, not a promise, since real returns can vary a lot.
Is there a good book on the FIRE movement?
There are quite a few books covering FIRE, budgeting, and early retirement basics. We won't point to one specific title here, but your local library or a quick search should turn up several well-reviewed options.