Importers of HS 6306.12 (of synthetic fibers (669)) from Canada actually paid 19.04% on the taxed portion of the value in 2026-06 — 0.12% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 8.8%. Over the window the rate on the taxed portion moved 8.8% → 19.04%, with the largest single step +19.1pp in 2025-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 8.8% — importers actually paid 19.04%, so the trade-war overlay added 10.2 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "6306.12", origin: "Canada") · see it at trimtabist.com/tariffs
HS 6306.12. The schedule base rate is 8.8%; importers from Canada actually paid 19.04% on the dutiable value in 2026-06 — the trade-war overlay added 10.2 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 8.8% (2023-07) → 19.04% (2026-06), largest single step +19.1pp 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 · 2 CBP rulings cite this code · reproduce: tariff_story(hs: "6306.12", origin: "Canada") via /connect. Not customs or legal advice.