Importers of HS 8481.80 (of copper) from Canada actually paid 12.16% on the taxed portion of the value in 2026-06 — 1.14% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4%. Over the window the rate on the taxed portion moved 3.29% → 12.16%, with the largest single step +21pp in 2025-08. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4% — importers actually paid 12.16%, so the trade-war overlay added 8.2 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8481.80", origin: "Canada") · see it at trimtabist.com/tariffs
HS 8481.80. The schedule base rate is 4%; importers from Canada actually paid 12.16% on the dutiable value in 2026-06 — the trade-war overlay added 8.2 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.29% (2023-07) → 12.16% (2026-06), largest single step +21pp in 2025-08.
Canada's lower duty (1.14% vs 38.66%) lets it price up to 37.1% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Canada actually lands cheaper — $7.53/kg vs $9.64/kg (duty in, freight out).
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 · 15 CBP rulings cite this code · reproduce: tariff_story(hs: "8481.80", origin: "Canada") via /connect. Not customs or legal advice.