Importers of HS 8516.90 (of heaters or heating apparatus of subheading 8516.10, 8516.) from Mexico actually paid 14.27% on the taxed portion of the value in 2026-06 — 0.86% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.7%. Over the window the rate on the taxed portion moved 3.85% → 14.27%, with the largest single step +23.6pp in 2025-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.7% — importers actually paid 14.27%, so the trade-war overlay added 10.6 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8516.90", origin: "Mexico") · see it at trimtabist.com/tariffs
HS 8516.90. The schedule base rate is 3.7%; importers from Mexico actually paid 14.27% on the dutiable value in 2026-06 — the trade-war overlay added 10.6 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.85% (2023-07) → 14.27% (2026-06), largest single step +23.6pp in 2025-03.
7 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 · 6 CBP rulings cite this code · reproduce: tariff_story(hs: "8516.90", origin: "Mexico") via /connect. Not customs or legal advice.