Interim invoices, also known as progress invoice involves a long-term project, that is invoiced over a longer period to receive payment for services provided throughout the entire project. The following details are important to be included, to create interim invoices or an interim invoice template to avoid payment issues:
Project's timetable and date of sending interim invoices
Achievement evaluation of partial invoice or regular invoice.
Periodicity of invoicing.
Payment terms and conditions, and total cost
There are several standard billing periods.
Partial deadlines and payment deadlines
Final invoice number
Customer information