Where is my money actually going?
Almost everyone can name their rent and their car payment. Far fewer can name the third or fourth biggest line in their budget, and that is usually where the surprise is hiding — a category that grew quietly, a subscription that outlived its usefulness, or simply the cumulative weight of small, individually reasonable purchases. An expense audit is the unglamorous hour that turns assumptions into a number.
It matters more here than in ordinary budgeting because of how financial independence math works. Your FI number is just your annual spending divided by your withdrawal rate. That makes cutting spending uniquely powerful: it frees up money to invest and lowers the target you are investing toward, at the same time. A raise only does the first. At a 4% withdrawal rate, every $100 a month you permanently stop spending removes roughly $30,000 from the amount you need to accumulate.
This tool covers eight categories — Housing, Transportation, Food, Healthcare, Debt Payments, Personal & Family, Entertainment & Subscriptions, and Miscellaneous. Utilities and insurance sit inside Housing because that is how the cost is actually experienced: it is what the roof costs, all in. Enter costs at whatever frequency you actually pay them and annual amounts are spread across the year automatically, so irregular expenses show up in the monthly picture instead of ambushing you later.
When you are done, you can link the annual total straight to the FI Calculator so both tools always agree, and the figure appears on your dashboard alongside your net worth. Nothing is uploaded at any point — the whole site runs in your browser, with no account and no server storing your data.