This module adds a shipping method that calculates shipping costs as a percentage of the order's total value. It also allows you to set minimum and maximum shipping charges to ensure price consistency.
Charge a shipping rate based on a percentage of the total order value, provides the ability to set min & max values.
eg if you set a rate of 15% and the order total is 50 the user will be charged 7.50 for shipping. If you had also set a minimum of 10, then the user will be charged 10 in shipping instead of the 7.50.
Post-Installation
Once installed navigate to /admin/commerce/shipping-methods and add a shipping method. Select 'Percentage of Order value' and fill in the form.
Additional Requirements
Commerce & Commerce Shipping.