What is your financial independence number?

Financial independence planning gets clearer when you stop asking, "Do I have enough?" and start asking, "What number am I solving for?" Your financial independence number is that target.

The simple formula

At its simplest, your FI number is annual spending divided by your chosen withdrawal rate.

If you expect to spend $80,000 per year and use a 4% withdrawal rate, the target is $2,000,000. If you prefer a more conservative 3.5% withdrawal rate, the target rises to about $2,286,000.

Use investable assets, not every asset you own

The most useful FI calculation focuses on assets that can realistically fund your spending. Cash, brokerage accounts, retirement accounts, and other liquid investments usually belong in the model. Personal-use assets, like a primary residence or vehicle, may be part of your net worth, but they may not directly fund your annual lifestyle unless you plan to sell or borrow against them.

Your assumptions should be visible

A good FI plan should not hide the variables. Annual spending, current investable assets, savings rate, expected return, inflation treatment, and withdrawal rate all change the date. When those assumptions are visible, you can test tradeoffs without losing trust in the result.

Why the date matters

The FI number tells you the destination. Your FI date tells you the path. Once you combine your current assets, expected savings, and return assumptions, you can see when your portfolio is projected to reach the target.

That date gives every financial decision useful context. Increasing annual savings, lowering target spending, changing a withdrawal rate, or adjusting expected returns stops being theoretical. You can see exactly how the decision changes the timeline.

Keep the model practical

Precision does not mean pretending the future is guaranteed. It means documenting the calculation clearly enough that you can revise it when life changes. A useful FI model is deterministic, transparent, and easy to update.