Tariff Monitor: US Import Tariff Lookup

By 0xpi

Overview

Tariff Monitor answers US import tariff questions from the USITC Harmonized Tariff Schedule (19,856 10-digit codes). Tools: - lookup_hts_code: finds HTS codes for a product name or numeric prefix. Common product words (laptop, earbuds, e-bike) are mapped to the official heading that covers them. - calculate_tariff: estimated total rate for one HTS code and origin country, broken into layers: MFN base rate, Section 301 China (matched by HTS line, Lists 1 to 4A), Section 232, and the 2026 Section 301 forced-labor tariff. Each answer gives the date the data was checked, the exemptions and assumptions applied, and optionally the annual dollar duty for a given import value. - compare_origins: one HTS code across 2 to 8 origin countries, lowest rate first. All three tools are read-only. Figures are estimates for planning, not customs rulings; confirm at hts.usitc.gov. Preferential rates (USMCA, free trade agreements) are not applied. No account or API key. Limit: 25 tool calls per IP address per day.

Tools

calculate_tariff

Claude

Calculate the full stacked US import tariff rate for an HTS code from a specific origin country. Returns: base rate, each additional layer (China Section 301 matched by HTS line to Lists 1, 2, 3, 4A and the 2024 four-year-review increases, Section 232, and the 2026 Section 301 forced-labor tariff on 60 economies: 10% or 12.5% by origin, or a 10%/12.5% cap net of MFN for the EU, Taiwan, Japan, South Korea and Switzerland, in effect since 24 Jul 2026, FR Doc. 2026-15181, HTS 9903.05.20-9903.05.84), the total current rate, the date the data was checked, and notes naming each exemption or assumption (Section 232 goods, USMCA- or CAFTA-DR-qualifying entries, listed products). Also states when the Section 301 China product exclusions end, in both official wordings: through 11:59 p.m. EDT on November 9, 2026 (Federal Register, FR Doc. 2025-21671), which USTR's 26 Nov 2025 press release gives as "until November 10, 2026". Figures are estimates; IEEPA tariffs ended 20 Feb 2026 and are not included. Optionally computes dollar impact from annual import volume.

compare_origins

Claude

Compare the estimated US import tariff for ONE HTS code across several origin countries side by side (e.g. China vs Vietnam vs Mexico vs India), for sourcing and "China plus one" decisions. For each origin returns the total current rate, the layers that make it up (MFN base, Section 301 China, Section 232, 2026 Section 301 forced-labor tariff) and the rate after the Section 301 China exclusions end (through 11:59 p.m. EDT on 9 Nov 2026 per the Federal Register, FR Doc. 2025-21671; USTR's press release says until 10 Nov 2026), sorted lowest first, with the dollar duty when an annual import value is given. Estimates only; preferential rates (USMCA, FTAs) depend on rules of origin and are not assumed.

lookup_hts_code

Claude

Find the US HTS (Harmonized Tariff Schedule) code for a product, by plain-language product name or numeric prefix, from the official USITC schedule (19,856 10-digit codes). Use this first whenever you have a product name rather than a code (e.g. "laptop", "wireless earbuds", "toys", "solar panels", "e-bike", "running shoes"), then pass a code to calculate_tariff or compare_origins. Everyday shopping words that a plain search of the schedule misses are mapped to the official heading that covers them (e.g. laptop -> 8471.30 "Portable automatic data processing machines"), and the answer names that heading. Otherwise descriptions are matched as one phrase; if a phrase matches nothing the tool retries single words and says which word it used. Returns up to 12 codes.

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