There is no universal number of expense categories. OurLifeCosts suggests starting with roughly 8-12 clear groups for the first month, then changing them after you see your own data. Keep a category when its total helps you make a separate decision. A merchant name or every individual product rarely needs a category of its own.
How many expense categories do you actually need?
The number alone improves nothing. Five categories may be too broad for a family with children, a car, and several currencies. Thirty may exhaust someone who only wants to see housing, food, transport, and the amount left over.
Use one test: a separate category earns its place when you are willing to make a separate decision about it. If eating out and groceries behave differently, split them. If films, books, and concerts all serve the same purpose in your budget, keep them under entertainment for now.
A practical starter list
This is a starting point, not a standard. It gives the first report enough detail without turning every receipt into a survey.
| Category | What may belong there | When to split it |
|---|---|---|
| Housing | Rent, mortgage, utilities | Separate utilities if you manage their use or price independently |
| Groceries | Food and household shopping for home | Separate household supplies if the amount is large enough to manage |
| Eating out | Cafes, restaurants, delivery | Splitting by restaurant is usually unnecessary |
| Transport | Public transport, fuel, taxis | Separate a car if you want its full ownership cost |
| Health | Medicine, appointments, insurance | Regular treatment may deserve its own plan |
| Family and children | Education, care, support for relatives | Split children's costs from other family support when useful |
| Communication and subscriptions | Phone, internet, digital services | Track one subscription separately only if you will review it separately |
| Personal and leisure | Clothing, hobbies, entertainment | Split after the first month if one group dominates |
| Irregular expenses | Repairs, gifts, seasonal bills | Large predictable goals work better as separate sinking funds |
| Other | A temporary home for unclear purchases | Review monthly so it does not become a bin |
A category describes the purpose, not the shop
One supermarket receipt may contain food, pet supplies, and cleaning products. You do not need to split every receipt to the cent. Choose the level of accuracy that can change a decision.
If you will never manage cleaning products separately, leave the full receipt in groceries. If the real cost of a pet matters to next year's plan, pull the pet food out. A useful category is one you will still understand three months later.
"Shop near home" says almost nothing about how you live. "Groceries" and "Prepared food" describe two different habits.
How to handle transfers, refunds, and shared purchases
- Do not add transfers between your own accounts to expenses.
- A refund reduces the same category as the original purchase.
- A friend's reimbursement reduces your share of a joint purchase.
- Separate principal repayment from interest when that distinction matters to the analysis.
- Do not mix investment contributions with consumer spending.
In OurLifeCosts, an older expense keeps its original category even if that category is removed from the active list. History should remain readable. Removing a button for future entries should never rewrite the past.
Review the structure after three months
Open the report and inspect every category. If the amount raises no question and never changes a plan, merge it. If one large total hides several different decisions, split it.
- Do I understand what is inside this amount?
- Would I act if the number increased?
- Does classification take more time than the category saves?
- Are too many transactions still sitting in "Other"?
A good category list does not look clever. It stays out of the way while you record expenses and leaves you with a report that suggests the next decision.
Sources
This article is educational and does not provide personal financial or investment advice.