Time-based invoice: Consultants often charge an hourly rate for their services, like business consultation on an hourly basis, hourly academic consultation, management consultation, SEO consultation or performance measurement. Recurring invoice: Requesting payment for ongoing work, like daily team management, task asssignment, or progress report on a monthly or bi-monthly basis.
Standard invoice: Requesting payment at the end of a project including details like services provided, amount owed by client, & due date.
