Fixed expenses are expenses that cost the same each time you pay, most likely monthly or annually. Your rent, during the duration of your lease, will be a fixed expense. The money you pay each month will always be the same (assuming no additional fees are charged – such as a late fee).
Fixed expenses help you understand how much certain items will cost each month when planning out a budget. Typically, the fixed expenses will be rent, loan payments, insurance payments and certain bills.