Why is my website giving unintended shipping discounts?

Topic summary

A store owner reports that after creating a product discount code, customers are receiving shipping discounts even when no code is used. Shipping isn’t free ($0) but is reduced unexpectedly.

Initial suggestions focused on configuration: verify the discount isn’t an “automatic discount” and confirm shipping settings don’t include a free shipping option. The owner confirmed the discount is manual and not automatic.

Further troubleshooting checked product-level settings: ensure “This is a physical product” is enabled so shipping charges apply. The owner confirmed it is enabled and shipping is being charged, just at a discounted rate.

No definitive cause was identified. The helper recommended deeper investigation in the store’s admin and suggested either hiring them or contacting Shopify Support for advanced troubleshooting.

Status: Unresolved. Key questions remain about which shipping profile/rates are being applied and whether any shipping-rate conditions or overlapping discounts are inadvertently reducing shipping costs. A Shopify help link for discount types was provided.

Summarized with AI on January 5. AI used: gpt-5.

Very interesting.

I’d have to take a look at your store’s admin to help troubleshoot further. If you wanted to hire me to help with figuring out what’s going wrong, you can reach me via the contact details in the signature of this post. Just send me an email, and then we can work out a price.

Otherwise, I’d recommend reaching out to Shopify’ support team directly for further help troubleshooting.