{
  "dataset": "U.S. General Duty Rate Spread Within 6-Digit HS Subheadings",
  "publisher": "Aervik Labs",
  "guide": "https://aerviklabs.com/guides/is-the-6-digit-hs-code-enough/",
  "license": "CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)",
  "source": {
    "name": "U.S. International Trade Commission, Harmonized Tariff Schedule of the United States",
    "url": "https://hts.usitc.gov/",
    "license": "U.S. government work, public domain",
    "schedule_snapshot_date": "2026-09-14",
    "chapters_included": "96 chapters, 01-97; chapters 98 and 99 excluded"
  },
  "scope": {
    "rate": "General (Column 1) rate only; no special program, Column 2 or additional duties",
    "weighting": "unweighted: counted per subheading and per tariff line, not by import value"
  },
  "subheadings": 5612,
  "tariff_lines": 23193,
  "tariff_lines_with_subheading_modal_rate": {
    "count": 17502,
    "of": 23193,
    "percent": 75.5
  },
  "subheadings_one_identical_rate": {
    "count": 4044,
    "of": 5612,
    "percent": 72.1
  },
  "subheadings_with_percentage_rates": 5253,
  "percentage_spread_zero": {
    "count": 3910,
    "of": 5253,
    "percent": 74.4
  },
  "percentage_spread_5_pts_or_less": {
    "count": 4648,
    "of": 5253,
    "percent": 88.5
  },
  "percentage_spread_over_10_pts": {
    "count": 199,
    "of": 5253,
    "percent": 3.8
  },
  "subheadings_specific_or_compound_only": 359,
  "subheadings_mixed": 242,
  "subheadings_mixed_with_zero_percentage_spread": 116,
  "widest_percentage_spread": [
    {
      "hs6": "2401.10",
      "tariff_lines": 33,
      "distinct_general_rates": 4,
      "min_pct": 0,
      "max_pct": 350,
      "spread_pts": 350,
      "rate_kind": "mixed"
    },
    {
      "hs6": "2401.20",
      "tariff_lines": 66,
      "distinct_general_rates": 6,
      "min_pct": 0,
      "max_pct": 350,
      "spread_pts": 350,
      "rate_kind": "mixed"
    },
    {
      "hs6": "2401.30",
      "tariff_lines": 62,
      "distinct_general_rates": 4,
      "min_pct": 0,
      "max_pct": 350,
      "spread_pts": 350,
      "rate_kind": "mixed"
    }
  ],
  "line_counting": {
    "tariff_lines": "every 8- and 10-digit number listed; an 8-digit line with 10-digit statistical suffixes is counted itself and once per suffix",
    "eight_digit_lines": {
      "count": 11414,
      "with_subheading_modal_rate": {
        "count": 7849,
        "of": 11414,
        "percent": 68.8
      }
    },
    "most_detailed_lines": {
      "count": 19926,
      "with_subheading_modal_rate": {
        "count": 14924,
        "of": 19926,
        "percent": 74.9
      }
    }
  },
  "release": {
    "version": "2026-09-14",
    "versioning": "a release is identified by the schedule snapshot date it was computed from",
    "replaces": "2026-09-02",
    "corrections": [
      {
        "release": "2026-09-02",
        "corrected_in": "2026-09-14",
        "what_was_wrong": "The schedule export pull behind this release cut each General rate text longer than 40 characters to 40 (392 tariff lines in 55 subheadings, all specific or compound rates) and each description longer than 180 characters to 180 (15,094 tariff lines). The README disclosed the 40-character limit and bounded its effect, but the modal rate text and description columns still printed cut values, such as \"3.6606¢/kg less 0.020668¢/kg for each de\" for 1701.12.",
        "headline_figures_changed": [
          {
            "figure": "tariff_lines_with_subheading_modal_rate",
            "previous": 17522,
            "current": 17502
          },
          {
            "figure": "subheadings_one_identical_rate",
            "previous": 4046,
            "current": 4044
          }
        ]
      }
    ]
  }
}