How often will your clients/ customers pay you? Depending on the type of service or product you sell you will need to determine if you need to charge a deposit, or if you will let your clients/ customers pay on terms. If you decide that you need a deposit, your invoice will need to reflect this portion of a ‘pre-payment’ with a balance due at the completion. You might decide that you want your clients to pay on terms, such as NET15 or NET 30. Some business will also offer a discount for clients/ customers who pay before the due date on an invoice.