For construction or project-based businesses, these three types of invoices are common. The three types of invoices are the pro forma invoice, the interim invoice, and the final invoice. The pro forma invoice is an initial invoice that lays out the rough costs of the goods or services to be rendered. An interim invoice serves as a request for partial payment and a final invoice contains a complete outline of the goods and services provided as well as the outstanding payment amount. There are many more types of invoices, like debit invoices, credit invoices, and recurring invoices.