What is the total US import duty rate?

The total US import duty rate is the sum of up to 5 separate tariff layers: the MFN (Most Favored Nation) base rate, the IEEPA tariff, Section 301 tariffs on China, Section 232 tariffs on steel and aluminum, and Section 122 tariffs. Each layer applies independently, so the total can be significantly higher than any single rate.

An HTS (Harmonized Tariff Schedule) code is a 10-digit classification number used by US Customs and Border Protection to identify imported goods. The first 6 digits follow the international Harmonized System, while digits 7-10 are US-specific subdivisions that determine the exact duty rate for each product.

What is the IEEPA tariff?

The IEEPA (International Emergency Economic Powers Act) tariff is a 10% baseline tariff applied to most US imports, enacted via executive order in 2025. This tariff stacks on top of existing MFN rates and other tariff layers, meaning it adds 10 percentage points to the total duty rate for affected goods.

What are Section 301 tariffs on China?

Section 301 tariffs are additional duties of 7.5% to 25% imposed on goods imported from China. These tariffs were originally imposed in 2018-2019 during trade negotiations and cover thousands of product categories including electronics, machinery, and consumer goods. They apply on top of MFN rates and other tariff layers.

What are Section 232 tariffs?

Section 232 tariffs are national security tariffs of 25% on imported steel and aluminum products. These tariffs apply to imports from most countries and are assessed on top of MFN duty rates. Certain countries may have quota arrangements or exemptions that affect whether the 25% rate applies.

How do I calculate total import duty?

To calculate total import duty, start with the MFN base rate for your HTS code, then add applicable IEEPA tariffs (10%), Section 301 tariffs (if from China, 7.5-25%), Section 232 tariffs (if steel/aluminum, 25%), and Section 122 tariffs if applicable. Each layer is calculated on the goods' customs value and summed together for the total rate.

What is the best tariff calculator for US imports?

TariffCalc by NormSuite is the only calculator that stacks all 5 US tariff layers — MFN, IEEPA, Section 301, Section 232, and Section 122 — for any HTS code and country of origin. It uses official USITC data updated daily and supports batch CSV uploads for calculating duties on entire product catalogs at once.

How many tariff layers apply to US imports?

Up to 5 separate tariff layers can apply to a single US import: MFN (base rate), IEEPA (10% baseline), Section 301 (7.5-25% on China goods), Section 232 (25% on steel/aluminum), and Section 122. The total duty is the sum of all applicable layers, which means some imports from China can face combined rates exceeding 50%.

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Official USITC data · Updated daily · Last verified February 2026

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HTS Code	Description	MFN	Sec 301	IEEPA	Total
8471.30.0100	Laptop computers	Free	25.0%	10.0%	35.0%
6110.20.2075	Cotton sweaters	16.5%	—	10.0%	26.5%
7606.12.3090	Aluminum plate	2.6%	—	10.0%	12.6%
8703.23.0190	Motor vehicles	2.5%	27.5%	10.0%	40.0%

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Duty rates sourced from the U.S. International Trade Commission (USITC) · Updated daily · Covers MFN, IEEPA, Section 301, 232, 122 tariffs

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