Categories turn a flat list of expenses into answers, such as how much went to fuel versus maintenance.

1. Add a category. Open Manage categories from the expense form and create the ones you need.

2. Assign it when recording an expense by picking it in the Category field.

3. Compare. Charts and per-vehicle pages group costs by category, so a rising cost is visible instead of buried in a total.

If you do not need categories, leave them empty and every expense simply stays as an expense.