# Budget item categories Budget item categories are lookup value sets for project-specific budgets. Each category belongs to to one of the following budget types: - **Expense budget** is for non-time-related, currency-based budgeting ($). - **Fee budget** is for currency-based budgeting ($). - **Time budget** is for time-based budgeting (hours). You can use these categories to classify time entry or expense entry budget line items.