Standard International Trade Classification
U.S. imports of Self-Loading or Self-Unloading Agricultural Trailers & Semi-Trailers (SITC 78621) totaled $12.4M in August 2026, imported from 10 countries.
Importers of Self-Loading or Self-Unloading Agricultural Trailers & Semi-Trailers paid $24K in duties in August 2026, an average duty rate of 0.19% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Self-Loading or Self-Unloading Agricultural Trailers & Semi-Trailers imports of $12.4M in August 2026 ran 37% above the year-to-date monthly average of $9.1M.
Last updated: August 2026 dataAgricultural self-loading and self-unloading trailers — including forage wagons, grain carts, and silage trailers equipped with conveyors, augers, or hydraulic tipping mechanisms — are purpose-built for farm operations and classified separately from general-purpose cargo trailers. The agricultural end-use designation is a key classification criterion; a trailer with self-loading capability used outside of farming contexts may be pulled into a different SITC heading. Importers should verify that the trailer's design and documentation clearly establish agricultural purpose, as this affects both classification and potential eligibility for agricultural equipment duty treatment.
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488 import shipments a month
Customs authorities typically look for manufacturer specifications, product literature, and commercial invoices that explicitly describe the trailer's design for agricultural use — such as field harvesting, grain handling, or silage transport. Generic descriptions of 'self-loading capability' without agricultural context may result in reclassification under a broader trailer heading.
Agricultural trailers themselves do not typically require USDA APHIS import permits, but if a used trailer carries soil, plant material, or organic residue, APHIS may require cleaning and inspection at the port of entry to prevent introduction of pests or plant diseases. New equipment generally clears without such requirements.
Basic heading 393 of 642 in section 7
Basic heading 78621 · $12.4M of $172.0B
Imports · August 2026
origin
Mexico and Canada together supply 99% of it. Germany pays 10.0% duty; Mexico 0.0%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$12.4MYoY · free account
Exports
$7.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $100.7M of Self-Loading or Self-Unloading Agricultural Trailers & Semi-Trailers.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.
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