This dataset provides the ad valorem equivalent (AVE) of the applied import tariffs of the United States at the 6-digit product level (Harmonized System, 2022 revision), by country of origin and by date of entry into force, covering the tariff measures of the second Trump administration from January 2025 onwards: Section 232 (steel, aluminium, autos, copper, timber, trucks, semiconductors, pharmaceuticals...), IEEPA (fentanyl, "Liberation Day" reciprocal tariffs, USMCA border tariffs), Section 122, Section 301 (forced labour), Section 338, and the framework "deals" (UK, EU, Japan, South Korea, Switzerland...).
Each observation is the AVE (%) of the applied tariff for one exporter x HS6 product x entry-into-force date. The starting point (1 January 2025) is the pre-Trump AVE applied tariff (from MAcMap-HS6 2022 for general, MFN and preferential duties, updated with pre-existing Section 301 on China, and tariffs sanctions - no embargo and no trade remedies are taken into account).
The measures are then stacked according to the actual stacking/exclusion rules.
Reference document to cite: Guimbard, H. (2026). Trade Policy Shocks under the Second Trump Administration. CEPII Working Paper No 2026-07
Person in charge & contact: Houssein Guimbard, houssein.guimbard
sciencespo.fr
Licence: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0).
You may share and adapt the material provided that you (i) credit the reference above and indicate if changes were made, and (ii) do not use it for commercial purposes.
Full terms: https://creativecommons.org/licenses/by-nc/4.0/
- usa_tariffs_20260822.csv -- the data (comma-separated).
- usa_tariffs_20260822.parquet -- the same data in Parquet.
- readme_en.txt -- documentation (in English; variables, source, licence, size).
This database is updated with:
- the 2018-2020 Section 301 "trade war" duties on China (Lists 1-4A);
- the Section 301 China four-year review 2024, added on top of the MFN rate: electric vehicles 100%, syringes & needles 100%, solar cells & semiconductors 50%, medical gloves 50%, EV lithium-ion batteries & ship-to-shore cranes 25%.
- Russia and Belarus moved to HTSUS Column 2 (non-MFN/general) rates (H.R. 7108, 2022);
On this baseline, every 2025-2026 measure is coded at the product (HS6) level from U.S. executive orders, proclamations and Federal Register notices, and stacked according to the actual rules (e.g. Section 232 goods are excluded from the reciprocal tariff; framework deals cap the reciprocal rate; the Section 301 forced-labour and Section 338 duties carve out Section 232 and USMCA-compliant goods). The applied tariff (ave) is reconstructed for each exporter x HS6 x entry-into-force date.
Retroactive measures are dated at their retroactive effective date (e.g. the 11 April 2025 electronics/semiconductor exception applies from 5 April 2025; AGOA reauthorisation of February 2026 is retroactive to 30 September 2025).
The published file contains only the measures in force at the generation date (future, already-announced measures are excluded).
The source of the reference applied protection is MAcMap-HS6 v2022 (ITC-CEPII). The exhaustive list of measures, with entry-into-force dates and official sources, is in Guimbard (2026) and in the readme.
The ad valorem equivalent of the applied tariff reads 0.25 = 25%. It includes the pre-Trump baseline plus the stacked 2025-2026 measures.
Q. Why is "importer" always 842?
The dataset covers U.S. imports; 842 is the numeric code of the United States.
Q. What is the tariff at the earliest date (2025-01-01)?
The pre-Trump baseline (see Methodology): General tariff 2022 or MFN 2022 or preferences 2022 + pre-existing Section 301 China + tariffs sanctions. Every 2025-2026 measure stacks on top of it.
Q. Are retroactive measures handled?
Yes: they are placed at their retroactive effective date (see Methodology).
Q. Why doesn't the file include measures announced for later dates?
By construction it stops at the generation date and contains only measures already in force; already-announced future measures are not included.
Q. How is Russia treated?
Section 232 aluminium 200% is implemented. But embargoes are not taken into account.
Q. What about trade remedies?
Trade remedies such as antidumping duties are not implemented in this database.
