This article was co-authored by Michael R. Lewis. Michael R. Lewis is a retired corporate executive, entrepreneur, and investment advisor in Texas. He has over 40 years of experience in business and finance, including as a Vice President for Blue Cross Blue Shield of Texas. He has a BBA in Industrial Management from the University of Texas at Austin.
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If you work as an independent contractor or own a small company that performs a specialized service, the odds are that you will need to learn how to write an invoice for services rendered so you can be paid. The information you need to include on an invoice varies depending on the specific services you perform, but most invoices should include your contact information along with some other basic header information. An invoice should also include a listing of the services rendered for your client within the billing period, as well as the sum total owed to you.