Compare U.S. tariff treatment for any HTS code at two different dates. See added measures, removed measures, and rate changes — all source-backed.
All tariff rates are resolved from the TariffCatalog measure database. Verify results against official tariff databases before filing.
Enter HTS code, origin, and two dates, then run the tool to see a source-backed side-by-side tariff comparison. No signup is required.
Comparing tariff treatment at two dates shows whether a measure has been added, removed, or changed between the dates you enter. This helps confirm a future-effective Section 301 change, check whether a tariff exclusion has expired, or verify the rate in effect for an old shipment. The comparison is built on canonical U.S. tariff measure data and may carry a needs_verification note for future dates.
The comparison engine resolves tariff treatment at Date A and Date B separately, then diffs the two tariff stacks. It reports added layers, removed layers, rate changes, calculation status changes, and the duty amount delta when currency matches. Each side panel shows the applicable measure layers, verification notes, and source IDs for its queried date.
Use this tool when you need to know whether tariffs changed between two entry dates — for example, a past shipment versus today, or today versus a planned future date. Required inputs: HTS code, country of origin, and two dates. Optional inputs: customs value, currency, and quantity.
Verify results against the USITC HTS database and the official tariff measure source before filing. Tariff measures may change between database updates.
Official source notes and calculator assumptions should be reviewed before shipment, label purchase, invoice filing, or customs entry.
The comparison engine resolves tariff treatment at Date A and Date B separately, then diffs the two tariff stacks. It reports added layers, removed layers, rate changes, calculation status changes, and the duty amount delta when currency matches. Each side panel shows the applicable measure layers, verification notes, and source IDs for its queried date.
A trade manager compares HTS 6109.10.0012 (cotton T-shirt), origin CN, for Date A 2025-01-15 and Date B 2026-09-03, customs value USD 1,500. The tool returns Date A as the pre-policy-change stack with base MFN plus the older Section 301 rate, and Date B with an additional Section 301 layer added plus an updated duty total. The diff summary highlights the added layer, the rate change, and the resulting amount delta.
Verify results against the USITC HTS database and the official tariff measure source before filing. Tariff measures may change between database updates.
This tool provides planning estimates and document preparation support only. Confirm final classifications, duty treatment, and filing requirements with official tariff databases or qualified trade professionals.
The comparison reports added tariff layers, removed tariff layers, rate changes for existing layers, calculation status changes, total duty amount deltas, and verification-note changes between the two dates you enter.
Yes. Enter any two dates and the comparison resolves each one independently. A future date may carry a needs_verification note because announced tariff measures may change before their effective date.
A rate change means the resolved ad valorem rate for a named measure differed between Date A and Date B. The diff lists the measure name, the old rate, and the new rate so you can see exactly which layer changed.
A status flip typically happens when one of the two dates falls outside fully parsed source data — for example, a future date whose announced measure lacks a confirmed rate expression, or a historical date whose source record requires manual verification. The needs_verification status signals that the result should be checked against the most current official source.
Yes. Section 301 Chapter 99 measures are part of the tariff measure stack, so they appear as added, removed, or rate-changed layers in the diff when their effective windows or rates differ between the two dates.
The comparison uses the TariffCatalog versioned tariff measure database. Each response includes a resolver revision identifier and a queried-at timestamp. Verify any rate against the most current USITC revision before filing.
Use the AI HS Code Finder, CSV Catalog Checker, and Import Duty Calculator to prepare customs data before shipping.
