On this page
- Legal mechanism
- Original China investigation (Lists 1–4A) — technology transfer and IP
- Second four-year review (2026)
- Forced-labour investigation (2026) — 60 economies
- IEEPA vs Section 301 — the 2026 transition
- Structural excess capacity investigation (2026)
- Apparel and fashion impact
- Duty stacking on China-origin apparel (as-of 2026-08-01)
- Supply chain response (as-of 2026)
- Contradictions
- What practitioners report
- Key terms
- Related concepts
Section 301 Tariffs
Section 301 Tariffs
Additional import duties imposed by the United States under Section 301 of the Trade Act of 1974, which authorises the US Trade Representative (USTR) to investigate and respond to foreign countries' acts, policies, and practices that are unfair, unreasonable, or discriminatory and that burden or restrict US commerce. Section 301 is the primary US trade remedy for intellectual property theft, forced technology transfer, forced labour, and structural market distortions. For ecommerce importers — especially in fashion and apparel — Section 301 determines a significant portion of the duty stack layered on top of base MFN tariff rates.
Legal mechanism
Section 301 of the Trade Act of 1974 requires a formal USTR process before duties can be imposed: public notice of investigation, written comment periods, and public hearings. This procedural requirement distinguishes it from executive emergency authorities such as IEEPA, which the Supreme Court struck down in February 2026. (ayarlaw.com, undated; WilmerHale 2026-02-20)
Section 301 carries no statutory rate cap and no statutory expiry date; actions remain in force until USTR modifies or terminates them following a four-year review process. (ayarlaw.com, undated)
On CBP entry summaries (Form 7501 / ES-003), Section 301 tariffs are reported using HTS Chapter 99 overlay codes in the 9903.88–9903.89 range for the China technology-transfer investigation, and 9903.05.20–9903.05.84 for the July 2026 forced-labour action. (ustariffrates.com, undated; gingercontrol.com 2026-07) These codes are separate from IEEPA Chapter 99 lines, enabling customs and importers to distinguish which regime applied to each entry. (stonepathconsulting.com 2026)
Original China investigation (Lists 1–4A) — technology transfer and IP
The original Section 301 tariffs on China arose from a 2018 USTR investigation into China's acts, policies, and practices related to forced technology transfer, intellectual property theft, and innovation. Four lists of goods were designated: (gatewaylines.com, undated; ustariffrates.com, undated)
| List | Additional duty | Annual trade value | Effective date |
|---|---|---|---|
| List 1 | 7.5% (originally 25%; reduced under Phase One) | ~$34 billion | 2018-07-06 |
| List 2 | 25% | ~$16 billion | 2018-08-23 |
| List 3 | 25% (raised from 10% in 2019) | ~$200 billion | 2018–2019 |
| List 4A | 7.5% (originally 15%; reduced under Phase One) | ~$120 billion | 2019–2020 |
List 4A is the list most relevant to ecommerce: it covers consumer goods including apparel, footwear, laptops, and smartphones. It uses HTS overlay code 9903.88.04. (ustradestack.ai, undated)
Targeted sector rate increases from the first four-year review took effect September 2024 and phase in through 2026: electric vehicles raised to 100%, solar cells (non-module) to 50%, lithium batteries to 25%, ship-to-shore cranes to 25%, and medical gloves and syringes to 100%. (ustariffrates.com, undated; KPMG 2026-05)
Second four-year review (2026)
On May 6, 2026, USTR published a Federal Register notice (doc 2026-08806) initiating the second statutory four-year review of Section 301 tariffs arising from the China technology-transfer investigation. Without a continuation request from domestic industry, the tariff actions would expire on their four-year anniversary dates. (Federal Register 2026-05-06)
The comment window for the List 1 action (effective 2018-07-06) ran from May 7, 2026 through July 5, 2026. The comment window for the List 2 action (effective 2018-08-23) ran from June 24, 2026 through August 22, 2026. (Federal Register 2026-05-06; Thompson Hine 2026-05) No final determination from the second review had been published as of 2026-08-01.
A separate Section 301 investigation into China's targeting of the semiconductor industry, initiated December 2024, has resulted in new tariffs scheduled to take effect June 2027. (Steptoe 2026)
Forced-labour investigation (2026) — 60 economies
In March 2026 USTR initiated 60 Section 301 investigations into the failure of various economies to impose and effectively enforce prohibitions on the importation of goods produced with forced labour. (USTR press release 2026-03-12)
On June 5, 2026, USTR published proposed tariff actions in the Federal Register (doc 2026-11296): 10% on 15 trading partners and 12.5% on 45 trading partners, covering all products with certain exemptions. A public comment period ran to July 6, 2026, and a public hearing was held July 7, 2026. (Federal Register 2026-06-05; White & Case 2026-06)
On July 23, 2026, USTR Ambassador Jamieson Greer took final action, and the tariffs became effective at 12:01 a.m. Eastern on July 24, 2026. The Federal Register final notice was published July 28, 2026 (doc 2026-15181). (USTR press release 2026-07-23; Federal Register 2026-07-28)
Tier assignment (as-of 2026-07-24):
- 10% tier (15 trading partners): includes India and certain others
- 12.5% tier (45 trading partners): includes China, Vietnam, Bangladesh, Cambodia, Indonesia, Malaysia, Thailand, and most of Asia
Of the 60 economies, 54 were found to have neither imposed nor effectively enforced a forced-labour import prohibition; the remaining 6 (Canada, Ecuador, the EU, Indonesia, Mexico, and Pakistan) maintain prohibitions but were found to enforce them ineffectively. (White & Case 2026)
Exemptions from the forced-labour tariffs: certain agricultural products, aviation parts and equipment, industrial inputs, minerals, pharmaceutical goods, and goods already subject to Section 232 tariffs. A textile mechanism allows a certain volume of apparel and textile imports from certain economies to enter at a reduced forced-labour Section 301 rate. (Federal Register 2026-06-05; Morgan Lewis 2026-07)
IEEPA vs Section 301 — the 2026 transition
On February 20, 2026, the Supreme Court ruled 6–3 (in Learning Resources, Inc. v. Trump and Trump v. V.O.S. Selections, Inc.) that the President lacks authority to impose tariffs under IEEPA, invalidating tariffs on imports from Canada, Mexico, China, and most other US trading partners. The same day, President Trump issued a Proclamation under Section 122 of the Trade Act of 1974 imposing a 10% temporary import surcharge as a bridge measure. (WilmerHale 2026-02-20)
Section 122 carries a 150-day statutory limit and expired July 24, 2026 — the same date the new Section 301 forced-labour tariffs took effect, providing a seamless transition. (carraglobe.com, undated)
Section 301 tariffs were explicitly excluded from the CBP CAPE refund system (launched April 20, 2026 for IEEPA tariff refunds) and remain fully in force. (ayarlaw.com 2026)
Section 301 is considered more legally durable than IEEPA because it requires the formal USTR procedural process and has withstood legal challenges over several decades. (ayarlaw.com, undated)
Structural excess capacity investigation (2026)
On March 11, 2026, USTR self-initiated Section 301 investigations into structural excess capacity and production in manufacturing sectors across 16 economies: China, the EU, Singapore, Switzerland, Norway, Indonesia, Malaysia, Cambodia, Thailand, Korea, Vietnam, Taiwan, Bangladesh, Mexico, Japan, and India. (USTR press release 2026-03-11; Federal Register 2026-03-17, doc 2026-05214)
22 manufacturing sectors were identified, including aluminium, automobiles, batteries, cement, chemicals, electronics, energy goods, glass, machine tools, machinery, non-ferrous metals, paper, plastics, processed food and beverages, robotics, satellites, semiconductors, ships, solar modules, steel, and transportation equipment. (USTR fact sheet 2026-03-11)
No tariff actions from this investigation had been published as of 2026-08-01. (Duane Morris 2026-04)
Apparel and fashion impact
Duty stacking on China-origin apparel (as-of 2026-08-01)
Chinese-origin apparel (HS Chapters 61–62) faces a stacked duty structure: (tariffstool.com, undated; Federal Register 2026-15181)
| Component | Rate |
|---|---|
| Base MFN rate (Chapter 61/62, varies by fibre) | ~10–32% |
| Section 301 List 4A (HTS 9903.88.04) | +7.5% |
| Section 301 forced-labour (HTS 9903.05.xx) | +12.5% |
| Total effective rate (illustrative, cotton woven) | ~32–52% |
Supply chain response (as-of 2026)
China's share of US apparel imports fell from 20.9% in 2024 to 13.7% in 2025, according to Sheng Lu's USFIA annual benchmarking survey. (Sheng Lu / FASH455 2026-03-09)
Vietnam's textile and garment exports rose 1.7% to $22.2 billion in the first six months of 2026, benefiting from the post-SCOTUS reduction of its tariff burden from a 46% IEEPA rate to the 10% Section 122 surcharge; with the July 24 forced-labour tariff in force, Vietnam now faces 12.5% Section 301. Vietnam carries transshipment risk: goods incorporating Chinese-origin inputs may face punitive tariffs if flagged at the border. (FashionUnited 2026-07-07)
Bangladesh faces a 19% effective tariff; a pathway to 0% exists only if factories use US-origin cotton or man-made fibres. More than 20,000 garment workers lost jobs through factory layoffs or retrenchments in the first half of 2026. (FashionUnited 2026-07-07)
India was placed in the 10% forced-labour tier and is attracting fashion brand consolidation as an alternative sourcing location for denim, knits, embroidery, and luxury handwork. (Supply Chain Dive 2026)
Practitioner accounts confirm the nine-month lead time of fashion supply chains makes rapid sourcing relocation extremely difficult: Rebecca Minkoff stated in April 2025 that the timeline made moving factories "impossible" within a tariff cycle, and described a prior tariff period as generating a $6 million swing in her company's profitability. (CNBC / Yahoo Finance Opening Bid 2025-04-02)
Contradictions
Composite Chinese apparel duty rate (pre vs post July 24, 2026): Tariffstool.com estimated a total tariff on Chinese clothing of approximately 34% as of July 2026, which appears to predate the July 24, 2026 forced-labour tariff (+12.5%) taking effect. Post-July 24, the correct composite for a typical cotton woven garment (Chapter 62) would be approximately 32–35% MFN + 7.5% List 4A + 12.5% forced-labour = approximately 52–55% total. No single authoritative post-July 24 table was found. Sources: tariffstool.com (pre-July 24 estimate) vs Federal Register 2026-15181 (forced-labour tariff effective date) + Federal Register 2026-11296 (12.5% rate).
Tariff impact: domestic manufacturers vs importing brands. Bloomberg's August 2025 video reported approximately 40 US textile mills closed over two-and-a-half years and that tariffs intended to support domestic manufacturing were in practice hurting US textile exporters. Rebecca Minkoff (CNBC 2025-04-02), an importing brand, framed her earlier sourcing shift from China as having saved her company money long-run despite short-term pain. These represent two different stakeholder positions — importer/brand vs domestic manufacturer — rather than a direct factual contradiction, but the "who wins from Section 301" framing diverges sharply by stakeholder class. Sources: Bloomberg (2025-08-10) vs CNBC/Rebecca Minkoff (2025-04-02).
What practitioners report
Rebecca Minkoff told CNBC (April 2025) that the nine-month fashion calendar made relocating supply chains within a tariff cycle "impossible," adding that a prior tariff period caused a $6 million swing in her company's profitability — a loss of $3 million versus an expected profit of $3 million. She characterised the long-run China exit as money-saving but painful. (CNBC / Yahoo Finance Opening Bid 2025-04-02)
Over 70% of surveyed US fashion companies reported that higher tariffs increased sourcing costs, squeezed profit margins, and led to higher consumer prices, according to USFIA benchmarking survey data attributed to Sheng Lu. (Sheng Lu / FASH455 2026-03-09)
Key terms
| Term | Meaning |
|---|---|
| Section 301 | Provision of the Trade Act of 1974 granting USTR authority to investigate and respond to unfair foreign trade practices |
| USTR | Office of the United States Trade Representative; the agency that administers Section 301 |
| Four-year review | Statutory review process under which continuation requests from domestic industry are required to keep Section 301 actions in force past their four-year anniversary |
| List 1/2/3/4A | The four product lists from the 2018 China technology-transfer investigation, each carrying a different additional duty rate |
| HTS 9903.88.xx | Chapter 99 overlay codes for China technology-transfer Section 301 tariffs (e.g. 9903.88.04 for List 4A) |
| HTS 9903.05.xx | Chapter 99 overlay codes for the July 2026 forced-labour Section 301 tariffs |
| Forced-labour Section 301 | New Section 301 action effective July 24, 2026, imposing 10–12.5% on 60 economies for failure to ban goods made with forced labour |
| IEEPA | International Emergency Economic Powers Act; executive emergency trade authority struck down by Supreme Court February 2026 |
| Section 122 | Trade Act of 1974 emergency balance-of-payments provision used as a bridge tariff (10%) from February 20, 2026 to July 24, 2026 |
| Duty stack | The combined effective tariff on a good: base MFN rate + all Section 301 rates + any Section 232 rates |
| CBP CAPE | CBP refund system for IEEPA tariffs (launched April 20, 2026); Section 301 is excluded from CAPE refunds |
Related concepts
Tariffs & Duties · HS Code Classification · Landed Cost · Cost of Goods Sold (COGS) · De Minimis · CBP CROSS · Tariff Engineering · Rules of Origin · Anti-Dumping and Countervailing Duties (AD/CVD) · Binding Tariff Information (BTI) · Section XI (Textiles) · Incoterms · USMCA · Free Trade Zones