Some of the more popular options are: FreshBooks. Zoho. SliQ Invoicing. Intuit Quickbooks. Invoice2go. Express Invoice. kBilling. PaySimple. Try to find a billing software or service that allows you to track your invoices, provides means to resolve disputes, handle exceptions to regular billing practices, and lets you make notations. Make sure you can fulfill your potential billing software’s necessary technical requirements before downloading and/or paying for the product. A software called Billing Organizer Pro, for example, only works for certain versions of Windows operating systems.

For example, many businesses choose to make payment due within 15 or 30 days of the sale. You can also establish different payment lengths for different customers. Just make sure to include these terms in your contracts with them. Take into account how customers and your supply partners might like to pay their bills to you. Consider discussing your new or modified billing system with them to ensure their cooperation in using it. Whatever payment terms you choose, just be sure that you are consistent in applying them. [6] X Research source

The products or services provided. The quantity provided (hours or number of products). Expenses involved (including copies of receipts in some cases). The amount due. When the payment is due. For your own purposes, you may also want to include an invoice number and/or a customer number. [8] X Research source

Your policy should also specify a maximum number of late days allowed before legal action will be taken. [10] X Research source