Billable items in WHMCS can be used to bill your customers for something that isn't one of your set products or services. Let's add a new billable item
1) Go to Billing
2) Click Add New
3) Select the Client
4) Enter a Description
5) Specify an Amount
6) Choose which Invoice Action to take
7) Click Save Changes
The client has now received a new Billable Item. It will show up on her next invoice
You can edit or delete billable items using these buttons
This completes the tutorial. You now know how to create a new billable item in WHMCS