See what US import duty costs every product in your Shopify catalogue and what it leaves you, by country of origin, with the working behind every rate.

• Effective US duty and landed margin per variant, from fields you already keep
• Opens to show the working: base duty, every layer, and where each one is written
• Warns before a duty change lands, naming your products and the new cost per unit
• Every rate change on your catalogue in the last 30 days, and a CSV of the lot
• Names the missing field on any variant that cannot be checked yet