Importers of HS 3901.20 (having a relative viscosity of 1.44 or more) from Canada actually paid 11.07% on the taxed portion of the value in 2026-06 — 0% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 6.5%. Over the window the rate on the taxed portion moved 6.51% → 11.07%, with the largest single step -24.8pp in 2025-06. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 6.5% — importers actually paid 11.07%, so the trade-war overlay added 4.6 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3901.20", origin: "Canada") · see it at trimtabist.com/tariffs
HS 3901.20. The schedule base rate is 6.5%; importers from Canada actually paid 11.07% on the dutiable value in 2026-06 — the trade-war overlay added 4.6 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 6.51% (2023-07) → 11.07% (2026-06), largest single step -24.8pp in 2025-06.
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 · reproduce: tariff_story(hs: "3901.20", origin: "Canada") via /connect. Not customs or legal advice.