Upcharge or Additional Fee
When integrating ShipStation to an ERP system, you might want to charge your customer an extra handling fee above and beyond what the carrier is charging. Example a 5% upcharge or a $5 fee per shipment.
We have recently released a feature called In Cart Delivery Options that may address what you are asking. It allows users to create the delivery options their customs see during checkout and adjust the shipping price by a dollar amount or set % from the rate provided by the carrier for that service.
This feature currently works only with certain selling channels (Shopify, BigCommerce, and Magento), but we are expanding to more channels throughout the year.
If you have a specific ERP system in mind that is not on our current roadmap, we may be able to refer you to a solution provider that can leverage ShipStation’s API to build a custom solution for you.