How the tariff landed cost calculator works
Landed cost is what one unit really costs you by the time it reaches an Amazon or Walmart warehouse. The calculator adds:
- Product cost per unit.
- Duty: product cost × your total duty rate. US duty is usually charged on the customs value of the goods, not on international freight.
- Freight and import costs for the whole shipment, divided by the number of units.
- Prep and inbound cost per unit.
It then works out your break-even price and the price you need for your target margin:
Break-even price = (landed cost + fulfillment fee) ÷ (1 − referral fee %)
Price for target margin = (landed cost + fulfillment fee) ÷ (1 − referral fee % − target margin %)
The “what if” table shows the same numbers with the duty rate 10 and 25 percentage points higher, so you can see how exposed a product is to tariff changes.
Which duty rate should I enter?
Add up every rate that applies to your product’s HTS code and country of origin. For goods from the 60 economies in USTR’s July 23, 2026 Section 301 action, that includes the new 10% or 12.5% tariff on top of normal duty, unless the goods are covered by Section 232. A licensed customs broker can confirm the full rate. Our guide Tariffs in 2026 for Amazon and Walmart Sellers explains the 2026 changes.
Frequently asked questions
What costs should go in “other import costs”?
Customs broker fees, entry and processing fees, your customs bond, port charges and trucking from the port to your warehouse or prep center.
Why doesn’t the calculator include storage?
Storage depends on how long stock sits. Add an average storage cost per unit to the fulfillment fee if you want to include it.
Is this customs advice?
No. It’s an estimate to help you plan pricing. Confirm HTS codes and duty rates with a licensed customs broker before you order.
Last updated September 15, 2026