Section 232 vs Section 301: How the Two Tariff Programs Compare

What is the difference between Section 232 and Section 301 tariffs?

Section 232 tariffs are imposed to protect national security, targeting specific product categories (steel, aluminum, automobiles, auto parts, semiconductors) regardless of origin country. Section 301 tariffs address unfair foreign trade practices, targeting specific countries (currently China, with new investigations covering 76 economies) across a broad range of product categories. Section 232 is product-first; Section 301 is country-first. Both can result in tariff rates of 25% or higher, and both can apply to the same product simultaneously.

Can a product be subject to both Section 232 and Section 301 tariffs?

Yes. A steel product imported from China, for example, faces the base MFN duty plus Section 232 tariffs (25-50% on steel) plus Section 301 tariffs (China-specific rates). Section 232 and Section 301 stack on top of each other. However, neither stacks with Section 122 tariffs. Understanding these stacking rules is essential for accurate duty calculation.

Section 232 and Section 301 are the two most significant tariff programs in the current U.S. trade framework, yet importers frequently confuse them, misapply them, or fail to account for their interaction. Each operates under different legal authority, covers different products, targets different countries, and follows different procedural requirements. With the administration actively expanding both programs (Section 232 auto parts inclusions and new Section 301 investigations), understanding how each works independently and together is fundamental to compliance.

Last updated: March 2026

Legal Authority and Purpose

Feature	Section 232	Section 301
Statute	Trade Expansion Act of 1962	Trade Act of 1974
Administered by	Department of Commerce / President	USTR
Trigger	National security threat from imports	Unfair foreign trade practices
Targeting basis	Product-specific	Country-specific
Investigation required	Commerce Dept. investigation	USTR investigation with public hearings
Rate limits	No statutory cap	No statutory cap
Duration	Indefinite	Indefinite
Current scope	Steel, aluminum, autos, auto parts, copper, lumber, semiconductors	China (Lists 1-4), new investigations into 76 economies

Section 232 authorizes the President to impose tariffs on imports that threaten national security. The Department of Commerce conducts an investigation, and based on its findings, the President decides whether and how to act. The program has been used most extensively for steel (25-50%), aluminum (25%), and automobiles/auto parts (25%).

Section 301 authorizes USTR to investigate and respond to foreign trade practices that are unjustifiable, unreasonable, or discriminatory and burden U.S. commerce. The most prominent use has been the China Section 301 tariffs (2018-present), with rates ranging from 7.5% to 100% across four product lists. In March 2026, USTR initiated new Section 301 investigations into 16 economies for excess manufacturing capacity and 60 economies for inadequate forced labor enforcement.

How Each Program Affects Duty Calculation

Section 232 duty structure: Rates are set by product category and apply to imports from all countries unless modified by a bilateral trade agreement. Current rates:

Steel: 25% (increased to 50% on June 4, 2025 for certain products)
Aluminum: 25%
Automobiles: 25% (with bilateral modifications: U.K. at 10%, EU at 15%, Japan at 15%)
Auto parts: 25% (scope expanding quarterly through inclusions process)
Copper, lumber, semiconductors: Under investigation or recently imposed

Section 301 duty structure: Rates are set by product lists targeting specific countries. The China Section 301 program covers four lists with rates ranging from 7.5% to 100%. Products are identified by their HTS code, and the applicable rate depends on which list the product falls under.

Stacking rules: Section 232 and Section 301 tariffs stack on top of each other. A steel product from China faces:

Base MFN duty (~3%)
Section 232 steel tariff (25-50%)
Section 301 China tariff (25%)
Total: potentially 53-78%

Neither Section 232 nor Section 301 stacks with Section 122 tariffs (10% global). Products covered by Section 232 are generally exempt from Section 122.

How Classification Determines Exposure

Whether a product is subject to Section 232, Section 301, or both depends entirely on its HTS classification.

Section 232 scope is defined by specific HTS codes listed in the relevant Presidential Proclamations. For auto parts, the scope is expanding quarterly through the inclusions process. An incorrect classification can mean paying Section 232 tariffs on a product that is not covered, or failing to pay them on a product that is.

Section 301 scope is defined by lists of HTS codes targeting Chinese-origin goods. Different lists carry different rates. A classification error that places a product on the wrong list (or off the lists entirely) results in an incorrect duty assessment.

GingerControl's HTS Classifier surfaces multiple candidate codes with GRI analysis and CROSS ruling research. The Classifier identifies which tariff programs apply to each candidate, so the broker can see how a classification decision affects the full tariff stack before making the final determination. Try the Classifier

How Bilateral Deals Modify Each Program

Section 232 rates have been modified through bilateral trade agreements:

U.K.: Auto tariff reduced to 10% (up to 100,000 vehicles)
EU: Auto tariff reduced to 15%, conditioned on EU implementing commitments
Japan: Auto tariff reduced to 15%
USMCA: Qualifying goods from Canada/Mexico may be exempt

Section 301 tariffs on China have not been reduced through bilateral agreements, though the U.S.-China "Phase One" deal from 2020 remains nominally in force. The new Section 301 investigations could produce country-specific rate agreements with the 76 investigated economies.

GingerControl's Tariff Calculator models all bilateral modifications across 200+ countries, showing the actual effective rate for each product and origin combination. Try the Tariff Calculator

What Is Changing in Each Program?

Section 232 expansion. The auto parts inclusions process adds new products to the 25% tariff quarterly. The April 2026 window is open April 1-14. Copper, lumber, and semiconductor investigations are producing additional Section 232 tariffs.

Section 301 expansion. The new investigations into excess manufacturing capacity (16 economies) and forced labor enforcement (60 economies) could produce tariff actions similar in scope to the invalidated IEEPA duties. Hearings begin in late April and May 2026, with results expected before the Section 122 tariffs expire on July 24.

FAQ

Which program affects more products?

Section 301's China tariffs cover thousands of HTS codes across virtually every product category. Section 232 covers fewer product categories but applies to all countries (with bilateral modifications). For a U.S. importer sourcing from China, Section 301 is likely to affect more of their product portfolio. For an importer sourcing globally, Section 232 affects specific product categories regardless of origin.

Can I avoid both Section 232 and Section 301?

Sourcing from a non-China country for products not covered by Section 232 avoids both. For products covered by Section 232, bilateral trade deals may reduce (but typically not eliminate) the rate. USMCA qualification for goods from Canada/Mexico can eliminate both programs for qualifying products.

How does GingerControl help with Section 232 and Section 301 compliance?

The Tariff Calculator models both programs (and their stacking) across 200+ countries. The Classifier identifies which programs apply to each HTS code candidate. The Tariff Briefing monitors scope changes in both programs daily. Try GingerControl

Understanding whether Section 232, Section 301, or both apply to your products is the first step in accurate duty calculation. GingerControl's Tariff Calculator models the full stack.

GingerControl is not just a tool. We work with importers and trade compliance teams on process consulting, digital transformation strategy, and end-to-end custom system development. Talk to our team

References

[REF 1] USTR, "Section 301 Investigations" Data cited: 76 economies under investigation, China tariff lists Source: USTR Published: March 2026

[REF 2] Federal Register, "Section 232 Auto Parts Inclusions Window" Data cited: April 2026 inclusions window, quarterly process Source: Federal Register Published: March 24, 2026

[REF 3] Reed Smith, "Trump 2.0 Tariff Tracker" Data cited: Stacking rules, bilateral deal rates, Section 232/301 interaction Source: Reed Smith Published: March 24, 2026

[REF 4] Penn Wharton Budget Model, "Effective Tariff Rates" Data cited: Steel/aluminum 41.1% ETR, China 33.9% ETR Source: Penn Wharton Published: March 16, 2026