By the Digital Empire Regulatory Research Team (TariffWatch Analysis Team) · Reviewed by Andy Gaber, Founder, Digital Empire Holdings LLC · Published August 24, 2026 · Last updated August 24, 2026
Short version: the USITC HTS Search at hts.usitc.gov is the free legal publication of the U.S. tariff schedule. WITS is the World Bank's free multi-country trade-and-tariff research tool. Both are canonical. Both are static lookups. Neither alerts anyone when a Chapter 99 headnote just quietly doubled a landed-cost line. That is the entire reason TariffWatch exists.
The U.S. International Trade Commission maintains hts.usitc.gov as the official free publication of the Harmonized Tariff Schedule of the United States. It publishes the current schedule, historical revisions, Chapter 99 headnotes (where Section 232, 301, and IEEPA rate overlays live), and rules of interpretation. It is the legal reference and it is free. USITC's own guidance is explicit that the search does not classify a specific product for the importer, does not compute an effective duty by origin, and does not send alerts. It is a lookup surface.
The World Integrated Trade Solution at wits.worldbank.org is a free World Bank platform that aggregates tariff and trade-flow data across countries for economists and policy researchers. It is broad, downloadable, and academically oriented. The trade data typically lags by months to years, which is fine for cross-country policy research and useless in a U.S. regime where tariff rates change by proclamation weekly.
TariffWatch reads on top of USITC, the Federal Register, and CBP's Chapter 99 overlays and produces (a) change detection (a diff surface between the schedule this week and the schedule last week, structured per HTS code), (b) plain-language duty stacking ("your effective rate on 8708.99 from China is now X%: base + 301 + 232 derivative"), and (c) watchlist-personalized alerts tied to Federal Register notice 2026-15961 and the 2026-08-27 BIS deadline. Free tier for the exposure check; $29/month for the watchlist.
USITC and WITS publish reference data; TariffWatch interprets that data against a specific importer's HTS exposure and alerts on changes. Neither substitutes for the other — everyTariffWatch exposure output cites the underlying USITC HTS section and Federal Register notice it was computed from.
| Dimension | USITC HTS Search | WITS (World Bank) | TariffWatch |
|---|---|---|---|
| Price | Free | Free | Free checker + $29/mo watchlist |
| Data authority | Legal reference for U.S. schedule | Aggregated multi-country research data | Reads on top of USITC + Federal Register |
| Change detection | None (revisions publish, no diff surface) | None (data lags months-to-years) | Yes, per HTS code |
| Effective-rate stacking | Manual (Chapter 99 headnotes) | Not modeled at U.S. Chapter 99 depth | Plain-language stacked rate |
| Personalized alerts | None | None | Per-HTS watchlist alerts |
| Aug 27 2026 BIS deadline workflow | Publishes the notice; no deadline calendar | Not covered | Purpose-built for this deadline |
For any question of legal reference — what does column-1 general say about this HTS heading, what does the Chapter 99 headnote for a 301 subheading state, what is the current text of the statistical suffix on 8708.99 — USITC is authoritative and TariffWatch is not a substitute. Every serious classification decision should be made against USITC as the primary source, with a licensed customs broker as filer of record. That has not changed and will not change.
For cross-country tariff and trade-flow research, comparative policy analysis, and academic work, WITS is a superb free resource. It is not built for real-time U.S. importer operations and does not pretend to be.
For the operational questions — "did anything just change for the codes I import," "what is my effective rate today across all overlays," "what needs a comment letter before 2026-08-27" — TariffWatch is the tool and USITC is not built to answer any of those in a merchant-usable form. The government publishes the schedule; nobody in the government will ever text an importer when line 47 of Chapter 99 quietly doubled a landed-cost line.
The current effective rate on a given HTS code from a given country in the 2025-26 regime is rarely a single number pulled off column-1. It is a stack: base rate, plus any Section 301 tranche (subheadings under 9903.88.xx and similar), plus any Section 232 derivative overlay, plus any IEEPA reciprocal adjustment, plus antidumping/countervailing duties where applicable. Chapter 99 headnotes are the mechanism; the headnotes reference each other in ways that require chaining by hand on the USITC search. Practitioner posts and broker blogs 2025-26 candidly acknowledge that spreadsheets and paid tools are how brokers themselves compute effective rates because the official stack does not answer "what is the rate today" in one place. TariffWatch's duty-stacking output is a plain-language wrapper around the same underlying USITC data.
This is a hypothetical scenario, not a real customer case. A small automotive-parts importer regularly imports under HTS 8708.99 from Vietnam. During the September 2026 window, BIS publishes an additional derivative-inclusion list that catches part of the 8708.99 statistical suffix range. The USITC search reflects the new headnote language within days; nobody at USITC or the Federal Register emails the importer. The importer discovers the rate change six weeks later when their broker's invoice comes back with an unexpected 232 line. TariffWatch's watchlist would have alerted the day the new headnote published, with a stacked-rate breakdown of the change and the dollar impact estimated against the importer's historical volume on that code.
TariffWatch is a data and workflow tool that estimates Section 232 tariff exposure from publicly available Federal Register, USITC, and CBP data. TariffWatch is NOT a licensed customs broker under 19 CFR 111, NOT a filer of record, and NOT a legal-advice service. This is not customs classification advice. Compliance decisions remain the responsibility of the importer and their customs broker or trade attorney. TariffWatch does not guarantee that any classification, exposure estimate, or comment letter will be accepted by CBP, BIS, or Commerce.
TariffWatch is not affiliated with the U.S. Department of Commerce, the Bureau of Industry and Security (BIS), U.S. Customs and Border Protection (CBP), or the U.S. International Trade Commission (USITC). References to USITC and to the World Bank/WITS are nominative-fair-use for the sole purpose of comparing a paid software product against free government and multilateral publications.
hts.usitc.gov is the official free publication of the Harmonized Tariff Schedule of the United States, maintained by the U.S. International Trade Commission. It is the legal reference for HTS classification. It publishes the current schedule, historical revisions, and Chapter 99 headnotes where Section 232, 301, and IEEPA rate overlays live. It is authoritative and it is free. The USITC explicitly does not classify individual products, does not compute an importer's effective duty by origin, and does not send alerts when rates change.
The World Integrated Trade Solution (WITS) is a free World Bank tool that aggregates multi-country tariff and trade-flow data for researchers and policy analysts. It is broad, canonical, and academically-oriented. The trade data typically lags by months to years, which is fine for policy research and useless in a regime where U.S. tariff rates change by proclamation weekly.
Two reasons: (1) USITC publishes the schedule and the Chapter 99 headnotes but does not diff them, does not alert on changes, and does not personalize to an importer's HTS list — TariffWatch does all three; (2) Chapter 99 stacking (base duty + Section 301 + Section 232 derivative + IEEPA reciprocal + antidumping/countervailing where applicable) is famously hard to compute by hand from headnotes alone. TariffWatch's duty-stack calculator returns the effective rate in plain language for the codes in your watchlist. Neither replaces USITC as legal reference; they read on top of it, before the 2026-08-27 deadline and after.
No. USITC is the legal reference and TariffWatch cites USITC as a primary source in every exposure calculation. When there is any disagreement between what TariffWatch shows and what USITC publishes, USITC is right by definition. What TariffWatch adds is change detection, alerts, and personalization on top of the same underlying data.
No, neither does. USITC publishes revisions to the schedule; a reader has to notice the revision and diff it against the prior. WITS aggregates historical data that is months-to-years old and is not built for alerts. Every practitioner and broker publicly acknowledges the impossibility of tracking layered 232/301/IEEPA changes through official sources alone in the 2025-26 regime — even brokers publicly admit using spreadsheets and paid tools because the official stack cannot answer "what is my effective rate today."
The Federal Register is the legal publication where new tariff rules appear as proclamations, notices, and interim final rules. It is authoritative, unreadable at volume (dozens of trade-relevant notices per week during 2025-26), and, like USITC, offers no personalized alerting. TariffWatch reads the Federal Register and pushes an alert only when a notice touches HTS codes on the customer's watchlist.
No. TariffWatch is a data and workflow tool, not a licensed customs broker, not a filer of record, and not a legal-advice service. This comparison is factual differentiation of a paid software product from free government reference publications.
Or start watching an HTS code at /tariffwatch/watchlist ($29/mo).