Each category has attributes and a broader system category called an expense type. Choose the expense type which best matches your category. By doing this it will improve the analytics and help us categorize imported expenses. Each expense type is required to have one default category. You can reassign or edit this category if you would like. Expense types are system generated and additional ones cannot be added or changed. Here are some examples:
Mileage - This calculates the number of miles driven by the reimbursable rate in your preferences.
Unknown - The unknown category is provided if we cannot categorize an expense from our automated service.
Time - This calculates the number of hours worked by the hourly rate set in preferences.