Invoice Template Browse our extensive collection of free invoice templates. Our selection ranges from invoices for service providers to billing statements and rent receipts for landlords. If you are seeking a simple, cost-effective solution for invoicing your clients, these invoice and billing templates are an excellent place to start. Simplify and Impress with Professional Invoices If you run a service or consulting business, it's essential to make a good impression and make it as easy as possible for your clients to pay you. I designed this new invoice template with those factors in mind. In addition to its simple design, Hourly vs. Flat Rate Invoicing An hourly invoice is a document used to charge for the number of hours dedicated to providing a service. While similar to a bill, the invoice differs in that it typically does not need to be paid immediately but within the number of days listed on the document. There are two ways to charge for a service, one being hourly (this vers...