Looking for free invoice templates? Check out our sample invoices and see if they fit your needs! Use the sales invoice template for item transactions and the billing invoice template if you need to bill someone for your hourly employment (great for contractors!). Both blank invoices are available free for both personal and business use. These templates are Microsoft Office Word documents with the .dotx extension. Bookmark our website or subscribe to our RSS Feed for future updates, which will include additional invoice forms in multiple software formats.