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How to Check Any US Tariff Rate by HTS Code (2026)

A complete guide on checking US customs duty rates and Section 301 tariffs for 2026, including specific product examples and API tools.

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11 Oct 2026Source: Dev.to2 min read (0 views)
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How to Check Any US Tariff Rate by HTS Code (2026)

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  • US import duties are determined by the 10-digit HTS code from USITC tables.
  • Products from China incur an additional Section 301 tariff of 7.5% or 25%.
  • 38% of all rated tariff lines in the 2026 schedule are entirely duty-free.
  • Developers can use APIs like Dutyfinch to look up rates and statuses programmatically.

Import duties in the United States are determined by a product's 10-digit HTS code (Harmonized Tariff Schedule of the United States). For goods originating from China, an additional layer applies under Section 301 tariffs, adding an extra 7.5% or 25% to most classification codes.

According to the official USITC HTS 2026 Revision 19 schedule, which took effect on September 15, 2026, there are 11,414 rated tariff lines in total. Key statistics from the schedule include:

  • 38% of all rated tariff lines are duty-free at the general MFN rate.
  • Only 107 lines carry a general duty rate above 25%.
  • 10,003 out of the 11,414 rated lines (88%) are currently subject to a Section 301 list.
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Stock photo for illustration only, not from the actual event

38%Duty-free tariff lines
88%Lines subject to Section 301

For instance, a coffee maker under heading 8516, subheading 8516.71.00 carries a general duty rate of free or standard 3.7%. However, if manufactured in China, it falls under List 4A (heading 9903.88.15), incurring an additional 7.5% fee, resulting in a total duty of 3.7% + 7.5% = 11.2% of its customs value. The same coffee maker produced in Vietnam pays only the general rate of 3.7%.

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Additional duties may also apply, such as Section 232 tariffs on steel and aluminum, antidumping and countervailing duties, and product-specific exclusions running through November 9, 2026. Furthermore, 2024 four-year review increases apply to items like electric vehicles (+100%) and semiconductors (+50%).

Understanding HTS codes and overlapping tariff layers like Section 301 is crucial for importers and software developers building supply chain tools. Because updates published by the USTR in the Federal Register can alter entire chapters simultaneously, manual spreadsheets quickly become obsolete when trade policies shift.

For high-volume lookups or automated landed cost calculations, developers can query APIs like Dutyfinch, which indexes all 26,246 HTS codes. The service offers 50 free calls per day without requiring an API key, with paid plans starting at $5 for a pay-as-you-go tier or $19 per month for 2,500 requests.

Source: Dev.to

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