Good categories are the foundation of useful budget reports. Too many and you'll never categorize consistently. Too few and you won't gain insights.
The Sweet Spot: 8-15 Categories
Research shows that 8-15 categories hits the right balance between detail and usability:
Essential Income Categories - **Salary/Wages** — regular employment income - **Freelance/Side Income** — variable additional income - **Other Income** — refunds, gifts, interest
Essential Expense Categories - **Housing** — rent/mortgage, property tax, HOA - **Utilities** — electric, gas, water, internet, phone - **Transportation** — car payment, gas, insurance, maintenance - **Groceries** — food and household supplies - **Insurance** — health, life, dental - **Subscriptions** — streaming, software, memberships - **Dining Out** — restaurants, takeout, coffee shops - **Personal** — clothing, entertainment, hobbies - **Savings** — emergency fund, investments, goals
Tips for Consistent Categorization
- Use category rules to auto-categorize imported transactions based on vendor name
- Review uncategorized items weekly — don't let them pile up
- Merge similar categories if you find yourself debating where something goes
- Use colors to visually distinguish income (green) from expenses (red) on your calendar
When to Adjust
Review your categories quarterly. If a category has very few transactions, consider merging it. If one category has too many diverse transactions, consider splitting it.