Financial independence
How to Calculate Your Financial Independence Number
Learn how to estimate your financial independence number using annual expenses, withdrawal rates, inflation assumptions, and flexible scenarios.
8 min read
Your FI number starts with spending
A financial independence number is the amount of invested assets you may need to cover living costs without depending on active work income. The most useful starting point is annual spending, not gross salary.
If you spend $50,000 per year and use a 4% withdrawal rate, the simple estimate is $1,250,000. If you use a more conservative 3.5% rate, the estimate becomes about $1,428,571.
The withdrawal rate is an assumption, not a law
A lower withdrawal rate usually requires a larger portfolio but creates more margin. A higher withdrawal rate creates a smaller target but may require more flexibility if markets perform poorly.
Early retirement often lasts longer than traditional retirement, so many people test 3%, 3.5%, and 4% scenarios before deciding what feels realistic.
Build a range instead of chasing one exact number
Financial independence planning works better as a range. A lean FI number covers essentials, a base FI number covers your current lifestyle, and a fat FI number includes more travel, housing comfort, or family support.
Once you know the range, the next question is how monthly investing and expected growth can close the gap.