What should your invoice include? - A professional header - The first item on your freelance invoice should be your business name, or your full name, in professional (and easy to read) font. The font size should be a little bigger than the rest of the text on the invoice, and possibly even bolded for emphasis.
The client's contact information -Now you'll want to specify who the invoice is being made out to. Include the recipient's name, address, phone number and any other info below the invoice header.