Importers of HS 3916.90 (of acrylic polymers) from Thailand actually paid 16.48% on the taxed portion of the value in 2026-06 — 16.48% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 6.5%. Over the window the rate on the taxed portion moved null% → 16.48%, with the largest single step +16.5pp in 2025-08. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 6.5% — importers actually paid 16.48%, so the trade-war overlay added 10 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3916.90", origin: "Thailand") · see it at trimtabist.com/tariffs
HS 3916.90. The schedule base rate is 6.5%; importers from Thailand actually paid 16.48% on the dutiable value in 2026-06 — the trade-war overlay added 10 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 16.48% (2026-06), largest single step +16.5pp in 2025-08.
Thailand's lower duty (16.48% vs 39.02%) lets it price up to 19.4% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Thailand actually lands cheaper — $1.33/kg vs $1.71/kg (duty in, freight out).
All goods from Thailand · the whole tariff ledger · 4 CBP rulings cite this code · reproduce: tariff_story(hs: "3916.90", origin: "Thailand") via /connect. Not customs or legal advice.