RefundMath

Partial returns on discounted orders often over-refund because discount allocations are not applied correctly.RefundMath calculates the exact refund from those allocations for selected items and quantities, including tax credit.Paste an order ID or URL, select return items, copy the correct amount, then finish the refund in Shopify.Example: $500 order with a $50 discount. Returning one $50 item should refund $45, not $50.Free: 5 calculations. Pro: $9/month unlimited, 14-day free trial.