Tariff Line

See a supplier listing's landed cost and margin in-page — duty, freight and VAT for the US, UK, Australia and the EU.

Tariff Line is a browser extension for sellers. Click the toolbar icon and choose Calculate this page: it reads the supplier listing you are looking at, suggests a customs (HS) code, looks up the current duty rate, and shows the landed cost per unit and your margin. All calculations run in your browser, and nothing is read until you ask.

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Contact: marcus_ky@outlook.com · Last updated 2026-10-15