Importers of HS 8509.80 (other) from Thailand actually paid 14.3% on the taxed portion of the value in 2026-06 — 14.3% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4.2%. Over the window the rate on the taxed portion moved null% → 14.3%, with the largest single step +6.6pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4.2% — importers actually paid 14.3%, so the trade-war overlay added 10.1 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8509.80", origin: "Thailand") · see it at trimtabist.com/tariffs
HS 8509.80. The schedule base rate is 4.2%; importers from Thailand actually paid 14.3% on the dutiable value in 2026-06 — the trade-war overlay added 10.1 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 14.3% (2026-06), largest single step +6.6pp in 2025-09.
China's lower duty (14.13% vs 14.3%) lets it price up to 0.1% above Thailand at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $4.28/kg vs $6.72/kg (duty in, freight out).
2 Chapter-99 measures name Thailand; 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 Thailand · the whole tariff ledger · 10 CBP rulings cite this code · reproduce: tariff_story(hs: "8509.80", origin: "Thailand") via /connect. Not customs or legal advice.