Budgeting by category: where to start

A category budget isn't a spreadsheet of rigid goals — it's a limit that warns you before you overspend, not after.

Start with the categories that weigh the most

Before setting a limit for every category that exists, look at the three or four that eat up most of your month. Usually it's housing, food, and transportation. Setting a ceiling just for those already solves most of the problem.

Use your recent average as a starting point

A budget that ignores your real history tends to get abandoned within two weeks, because it's based on what you "should" spend, not what you actually spend. Start with the average of your last three months and lower it gradually, category by category.

Let the budget warn you before you go over

The point of a category budget isn't checking it every day — it's getting a warning when a category is close to its limit, in time to decide whether it's worth spending more there or holding off until next month.