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Stack Tariff

Tariff & duty calculator

Enter an HTS code, country of origin and customs value to see the full stacked duty and landed cost.

How to calculate a stacked tariff

  1. Enter the HTS code. Paste the 10-digit HTS code, or find it with the HS code lookup.
  2. Pick the origin and value. Choose the country of origin and enter the customs (entered) value.
  3. Read the stack. Every applicable measure is listed with its rate and amount, then totalled into duty, fees and landed cost.

About duty stacking

Since 2024, the duty on a US import is rarely a single rate. The base MFN rate is the floor; on top sit Section 301 (China), Section 232 (steel and aluminum), IEEPA and the reciprocal tariff, plus the Merchandise Processing Fee and Harbor Maintenance Fee. Each has its own effective dates and exclusions, and they apply in a specific order. This calculator reads the current measures from live government data and stacks them so the figure reflects what you’d actually owe today.

Frequently asked questions

What tariffs does this stack?
Base/MFN duty plus Section 301 (China), Section 232 (steel & aluminum), IEEPA, the reciprocal tariff, AD/CVD where applicable, and the MPF and HMF customs fees — each applied with its own effective date.
Why is my total higher than other calculators show?
Most tools built before 2024 miss the newer layers — Section 301 expansions, IEEPA and the reciprocal tariff. We stack all of them with current effective dates, which is usually why the number is higher (and correct).
Does the country of origin matter?
A lot. Section 301 applies only to China; the reciprocal baseline applies broadly; preferential rates apply to FTA partners. Change the origin and the stack changes.
Is this an official duty amount?
No. It is an informational estimate. CBP assesses the actual duty at entry, and classification is the importer’s responsibility. For filing, use a licensed customs broker.

More Tariff tools tools

HTS code lookupLanded-cost calculatorDe-minimis checkerSection 301 tariff checkerSection 232 tariff checker

Informational only — not customs advice. Classification and valuation decisions are the importer’s responsibility under 19 USC §1484. For binding rulings, file CBP Form 19; for declarations, consult a licensed customs broker.