Importers of HS 3908.10 (polyamide-6, -11, -12, -6,6, -6,9, -6,10 or -6,12) from Canada actually paid 7.79% 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 6.3%. Over the window the rate on the taxed portion moved 6.3% → 7.79%, with the largest single step +41.3pp in 2026-01. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 6.3% — importers actually paid 7.79%, so the trade-war overlay added 1.5 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3908.10", origin: "Canada") · see it at trimtabist.com/tariffs
HS 3908.10. The schedule base rate is 6.3%; importers from Canada actually paid 7.79% on the dutiable value in 2026-06 — the trade-war overlay added 1.5 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 6.3% (2023-07) → 7.79% (2026-06), largest single step +41.3pp in 2026-01.
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: "3908.10", origin: "Canada") via /connect. Not customs or legal advice.