US Tariff Data

Daily-updated US tariff data from 8 government sources. Free to use. No API key required.

Data is collected and maintained by DutyBird — tariff monitoring for US importers.

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What's in here

data/treasury-collections.json

Monthly customs duty collections from the US Treasury Monthly Treasury Statement.

Latest: $26.6B collected in February 2026 — up 308% year-over-year.

{
  "period": "2026-02",
  "collections_billions": 26.6,
  "fytd_billions": 144.3,
  "yoy_change_pct": 308,
  "source": "US Treasury Monthly Treasury Statement"
}

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data/section-301-rates.json

Current Section 301 tariff rates by country and legal authority. Source: USITC Harmonized Tariff Schedule and Federal Register.

{
  "country": "China",
  "rate_range_min": 30,
  "rate_range_max": 145,
  "legal_authority": "Section 301 Trade Action",
  "effective_date": "2018-07-06",
  "updated_at": "2026-03-19"
}

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data/active-exclusions.json

All 178 active Section 301 product exclusions with HTS codes, chapter 99 headings, and expiry dates. Updated nightly from USTR Federal Register notices.

Next mass expiry: November 10, 2026

{
  "hts_code": "8473.30.1180",
  "ch99_heading": "9903.88.69",
  "description": "Printed circuit assemblies 
    for rendering images onto computer screens",
  "list_number": 3,
  "expires_at": "2026-11-10",
  "status": "active",
  "source_doc": "FR Doc 2025-21671"
}

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data/federal-register-notices.json

Recent USTR and CBP Federal Register notices affecting tariff rates, with effective dates and HTS codes impacted.

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Update frequency

Source	Frequency
Federal Register	Every 6 hours
USITC HTS	Daily
Census Bureau Trade Data	Daily
US Treasury Collections	Monthly
Penn Wharton Budget Model	Monthly
CBP CSMS	Every 6 hours

Last updated: see commit timestamp above.

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Usage

All data is in JSON format. No authentication required. MIT licensed — use freely.

# Fetch active exclusions
curl https://raw.githubusercontent.com/dutybirdio/us-tariff-data/main/data/active-exclusions.json

# Fetch Treasury collections
curl https://raw.githubusercontent.com/dutybirdio/us-tariff-data/main/data/treasury-collections.json

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Need product-specific monitoring?

DutyBird monitors your specific HTS codes and alerts you when tariff costs change.

• Match your products against 178 active Section 301 exclusions
• Get alerted before Federal Register notices affect your shipments
• Track your actual duty exposure by HTS code and origin country

→ dutybird.io
7-day free trial. No credit card required.

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Data sources

See SOURCES.md for full source documentation.

License

MIT — see LICENSE

Data sourced from US government publications. Not legal or financial advice. Always verify with a licensed customs broker.