U.S. Tariff Timeline of Activity

The United States launched a new Section 301 investigation examining trade barriers and industrial overcapacity risks involving multiple economies.

• Coverage includes China, the European Union, Japan, South Korea, Mexico, India, Taiwan, Vietnam, Thailand, Malaysia, Indonesia, Singapore, Switzerland, Norway, Bangladesh, and Cambodia.
• The investigation may shape additional tariff actions later in 2026.

Section 232 national security tariff investigations expanded into additional strategic manufacturing categories.

• Focus areas include construction equipment, agricultural machinery, and industrial supply-chain resilience sectors.
• This expands tariff relevance beyond traditional metals and auto-centered categories.

A temporary across-the-board import surcharge took effect under Section 122 authority, applying to a wide range of imports.

• Used as a broad stabilization mechanism after the legal end of emergency tariff collection under IEEPA.
• Supplements the wider tariff environment rather than replacing all other tariff authorities.

Following termination of emergency tariff authorities under IEEPA, U.S. Customs and Border Protection began collecting duties under Section 122 temporary surcharge authority.

The Supreme Court ruled that the International Emergency Economic Powers Act does not authorize tariff collection, ending several emergency tariff programs.

• The shift affected reciprocal tariff measures and fentanyl-related tariffs tied to imports from Canada, Mexico, and China.
• This became the major legal turning point in the 2025–2026 tariff framework.

Suspension of duty-free de minimis treatment for selected imports remained in effect, increasing the number of shipments subject to formal customs entry and tariff collection.

Additional tariff measures affected Iran-linked trade exposure as part of broader national security-oriented trade enforcement actions.

Additional tariff measures affecting Cuba-linked imports were introduced under national security authorities as part of expanded trade enforcement policy.

Section 232 national security tariffs expanded to selected advanced computing chips and semiconductor equipment imports.

• Strengthens the strategic technology and supply-chain resilience layer of the tariff environment.

Includes new exemptions for electronics imports from the reciprocal tariff framework.

Adds a new chart on weighted average tariff rates and incorporates China’s higher retaliatory rate on U.S. exports.

Includes the 90-day pause of escalating reciprocal tariffs for nearly all U.S. trading partners and the increase to 125% reciprocal tariffs on China.

Update includes the additional 50% tariff on all imports from China.

Update includes new retaliatory tariffs announced by China and Canada.

Reflects the exemption list published April 3 for the April 2 universal tariffs, plus updates tied to a national economic emergency.

• 60 trading partners at specific rates; other partners at 10%.
• Non-USMCA Canada & Mexico imports at 12% after IEEPA fentanyl tariffs end.
• Updated auto, steel, and aluminum tariffs.

Timeline includes new details on Section 232 auto and auto-part tariffs, plus modeling for new tariffs on auto imports, Venezuela, and trading partners that import oil from Venezuela.

Updated timeline to add a secondary tariff threat on imports from Venezuela and countries that purchase oil or gas from Venezuela.

• Updated timeline for EU retaliation against U.S. Section 232 tariffs.
• New revenue and economic estimates for IEEPA tariff changes and Section 232 steel and aluminum implementation.

Updates timeline for Canada, Mexico, and China tariffs; economic and revenue estimates under revision.

President Trump imposed new tariffs on Canada, Mexico, and China.

Added threatened lumber and agricultural tariffs to the timeline.

• New estimates for a proposed 25% tariff on EU imports and increased tariff rates on China.
• Incorporates a refreshed model version and refined noncompliance assumptions.

Updated to include details around the 2025 trade war timeline and analysis of auto, steel, and aluminum tariffs.

Updated to include analysis of expanded steel and aluminum tariffs.

Updated to include new revenue collection data for Trump-Biden tariffs.

Reorganized tracker and added an estimate of the value of U.S. exports targeted by China’s retaliatory tariffs.

Updated to include revenue effects of ending duty-free de minimis treatment of imports from China.

Updated to include the 10% tariff on Canadian energy resources.

Updated to include additional analysis of the proposed 25% tariffs on Canada and Mexico that could begin February 1, 2025.

• Models proposed 25% tariffs on Canada and Mexico.
• Models proposed 10% tariff on China.

Adds updated import columns and reflects tariff-rate quotas that took effect in 2022 for certain steel and aluminum imports.

• Notes washing-machine safeguard tariffs expired after the extension period.
• Adjusts revenue and economic results for imposed tariffs and solar suspension impacts.

Adds import data through 2023, updates tariff collection data, and refreshes modeling reflecting Biden increases and Trump proposals.

Notes agreements replacing certain Section 232 tariffs with tariff-rate quotas and ending related retaliatory tariffs.

U.S. suspended tariffs on aircraft and other goods from the EU under a five-year pause; tracker layout reorganized.

U.S. eliminated tariffs on Canadian aluminum to avoid retaliatory tariffs.

U.S. reimposed tariffs and Canada announced retaliation.

U.S. reduced tariffs on $120B of Chinese goods to 7.5%; China reduced tariffs on approximately $75B of U.S. goods.

U.S. postponed the scheduled 15% tariff on $160B of goods from China and announced plans to reduce tariffs on another $120B. China took corresponding measures.

U.S. concluded a Section 301 investigation into France’s Digital Services Tax, threatening tariffs on French products.