As a freelancer, it can be tricky to get clients to pay on time, or even at all. Sometimes, you may find a client arguing that your work was not up to par, demanding that you accept a lower payment. To avoid this, make sure your contract is detailed and thorough. Verbal agreements are never enough—always put everything in writing. Be specific about the required payment due and make sure to include that it is nonnegotiable after completed. Also, use the invoice to your advantage. Be clear about when payment is due, and what methods of payment you accept. Most importantly, be polite. As a freelancer, many times you cannot afford a late payment. So be an effective communicator and make it easy for your clients to pay on time, so that you can get paid.