Tariff Calculator
Tariff cost and its effect on landed margin.
Duty rates and thresholds change with trade policy. These are planning estimates — the entry filed with customs decides the actual charge.
Tariff cost per unit
£1.66
combined rate 28.7%
The additional tariff adds £1.45 per unit on its own — 29.0% of goods value. Whether that comes out of your margin or the customer's pocket depends on how much pricing power you have.
How the Tariff Calculator works
A tariff is duty by another name, but the word usually comes up when rates change for policy reasons rather than routine classification. Additional tariffs stack on top of the base rate, and because they apply to the same customs value they can double or triple the duty on an affected product overnight.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do additional tariffs stack?
They add to the base rate rather than replacing it. A product with a 3.7% general rate and a 25% additional tariff pays 28.7% in total, both assessed on the same customs value.
How do I know if a tariff applies to my product?
By HS code and country of origin together. The same product attracts different treatment depending on where it was substantially manufactured — not where it shipped from, which is a distinction importers regularly get wrong.
Can I avoid a tariff by shipping through another country?
No. Origin follows where the goods were substantially transformed, not the route. Transshipment to disguise origin is customs fraud and is actively enforced. Genuinely relocating production is a different matter.
Who actually pays a tariff?
The importer pays it at the border, then it is split between supplier, importer and consumer depending on who has pricing power. Studies of recent tariff rounds generally find most of the cost passed through to buyers.