Defining Your Financial Independence Number
The number is less important than knowing what expenses it needs to cover and how you will track progress toward it.
The story
I once picked a round number because it sounded large enough. A year later I realized I had never written down the actual monthly costs I wanted that number to replace. When I listed housing, food, insurance, and a small buffer, the target changed. It was still a big number, but it was tied to a list I could see. Progress became a matter of comparing cash flow to that list instead of comparing an account balance to a guess.
Known mistakes
- Choosing a number with no connection to real expenses.
- Assuming investment returns will stay high enough to lower the target.
- Forgetting irregular costs like car repairs, medical bills, or travel.
- Updating the number every time the market moves.
- Treating the number as a finish line instead of a planning tool.
What I would do if I were starting over
- Write down current monthly expenses in plain categories.
- Add a buffer for irregular costs and a small margin for inflation.
- Decide which of those expenses you want cash flow to cover first.
- Multiply the monthly target by twelve to get a simple annual number.
- Track actual cash flow against that annual number once a quarter.
- Adjust the expense list when life changes, not when markets change.
- Keep the original list so you can see what has been covered and what has not.
A number without a list of expenses is just a guess. A list of expenses with a cash-flow target gives you something to measure. Start with the list.