Importers of HS 3909.50 (cements) from Canada actually paid 12.24% on the taxed portion of the value in 2026-06 — 0.01% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2.1%. Over the window the rate on the taxed portion moved 6.3% → 12.24%, with the largest single step -27.3pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2.1% — importers actually paid 12.24%, so the trade-war overlay added 10.1 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3909.50", origin: "Canada") · see it at trimtabist.com/tariffs
HS 3909.50. The schedule base rate is 2.1%; importers from Canada actually paid 12.24% on the dutiable value in 2026-06 — the trade-war overlay added 10.1 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 6.3% (2023-07) → 12.24% (2026-06), largest single step -27.3pp in 2025-09.
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 · 1 CBP ruling cite this code · reproduce: tariff_story(hs: "3909.50", origin: "Canada") via /connect. Not customs or legal advice.