Adding a percentage or fixed price adjustment to rates
If you’re using the Australia Post Shipping app in your Shopify store you might find you need to add a price adjustment to rates. For example, if you want to account for the cost of your packaging, or if you want to offer a discount on shipping fees. Adding a markup or adjustment to your carrier rates is very simple, follow this video or read the guide below.
How to adjust your rates:
From your Shopify admin, click Settings, then Shipping and delivery.
Choose Manage rates for the appropriate shipping profile.
Scroll down to the 'Shipping to' section, and find the rates you wish to edit.
Expand the 3 dots to the right of the rate and choose Edit.
Hint: if you can't find the rate you'd like to adjust look for a 'Carrier and app rates' tab in the 'Shipping to' section. Australia Post Shipping rates can become hidden when there are Shopify default rates also.
Add your rate adjustments in the 'Handling fee' field, it could be a positive or negative number. You can also choose to apply an adjustment by percentage or by flat rate.
Click Done and you’ve successfully modified your rate.
Make sure to save your changes, click the Save button to the right.