Importers of HS 8483.10 (designed for use solely or principally with spark-ignition i) from Canada actually paid 8.31% on the taxed portion of the value in 2026-06 — 4.28% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2.5%. Over the window the rate on the taxed portion moved 2.5% → 8.31%, with the largest single step +23.4pp in 2025-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2.5% — importers actually paid 8.31%, so the trade-war overlay added 5.8 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8483.10", origin: "Canada") · see it at trimtabist.com/tariffs
HS 8483.10. The schedule base rate is 2.5%; importers from Canada actually paid 8.31% on the dutiable value in 2026-06 — the trade-war overlay added 5.8 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2.5% (2023-07) → 8.31% (2026-06), largest single step +23.4pp in 2025-03.
7 Chapter-99 measures name Canada; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from Canada · the whole tariff ledger · 4 CBP rulings cite this code · reproduce: tariff_story(hs: "8483.10", origin: "Canada") via /connect. Not customs or legal advice.