Whenever a user records and expense in AceProject, he/she must associate the expense to an Expense Type. From a reporting standpoint, both the project level and Home tab expense reports allow you to filter by Expense Type. Hence, your decision on how best to make use expense types should take all this into account as well as the fact your expense types will be identical from one project to the next.
For example, in our demo account, expense type options are “Phone Bills”, “Logging/Travel Expenses”, “Material Purchase/Leasing”,”IT Software/Services”.