SnapBill does support the creation of once-off charges for one-time services.

To add a once-off charge for a one-time service:

* Login to your SnapBill account
* Got to Setup -> Services -> Add Service
* Add your desired service and once added click on the 'Add new package' link
* Enter your package name
* Enter the once-off cost in the Setup fee field
* In the Terms section click the (delete) button to remove both the annual and monthly terms
* Now click Add package

You have now created a package for a service with a once-off fee. Your clients can order this package through the online order centre just like they do with the recurring packages you create.