@molly0xfff @josgeluk you might not need the custom shipping rates functionality for this. Maybe you can do a work around with a discount. I have tinkered around with custom Shopify apps a bit in the past years. If you want I can have a look and see if there’s a custom code solution without needing to upgrade your Shopify plan. Hard to say without more info. Feel free to send me a more detailed description to canolcer@hey.com