Importers of HS 9405.11 (of brass) from Mexico actually paid 17.36% on the taxed portion of the value in 2026-06 — 0.19% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.9%. Over the window the rate on the taxed portion moved 7.47% → 17.36%, with the largest single step +18.6pp in 2025-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.9% — importers actually paid 17.36%, so the trade-war overlay added 13.5 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "9405.11", origin: "Mexico") · see it at trimtabist.com/tariffs
HS 9405.11. The schedule base rate is 3.9%; importers from Mexico actually paid 17.36% on the dutiable value in 2026-06 — the trade-war overlay added 13.5 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 7.47% (2023-07) → 17.36% (2026-06), largest single step +18.6pp in 2025-03.
Mexico's lower duty (0.19% vs 40.57%) lets it price up to 40.3% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Mexico actually lands cheaper — $4.76/kg vs $10.15/kg (duty in, freight out).
5 Chapter-99 measures name Mexico; 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 Mexico · the whole tariff ledger · reproduce: tariff_story(hs: "9405.11", origin: "Mexico") via /connect. Not customs or legal advice.