Importers of HS 6109.90 (of man-made fibers) from Mexico actually paid 40.16% on the taxed portion of the value in 2026-06 — 4.37% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 32%. Over the window the rate on the taxed portion moved 26.17% → 40.16%, with the largest single step +12.8pp in 2025-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 32% — importers actually paid 40.16%, so the trade-war overlay added 8.2 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "6109.90", origin: "Mexico") · see it at trimtabist.com/tariffs
HS 6109.90. The schedule base rate is 32%; importers from Mexico actually paid 40.16% 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 26.17% (2023-07) → 40.16% (2026-06), largest single step +12.8pp in 2025-03.
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 · 16 CBP rulings cite this code · reproduce: tariff_story(hs: "6109.90", origin: "Mexico") via /connect. Not customs or legal advice.