Importers of HS 8431.39 (other) from Taiwan actually paid 14.67% on the taxed portion of the value in 2026-06 — 14.59% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is Free. Over the window the rate on the taxed portion moved null% → 14.67%, with the largest single step +15.8pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 14.67%, so the trade-war overlay added 14.7 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8431.39", origin: "Taiwan") · see it at trimtabist.com/tariffs
HS 8431.39. The schedule base rate is Free; importers from Taiwan actually paid 14.67% on the dutiable value in 2026-06 — the trade-war overlay added 14.7 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 14.67% (2026-06), largest single step +15.8pp in 2025-09.
Taiwan's lower duty (14.59% vs 36.9%) lets it price up to 19.5% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $3.07/kg vs $3.51/kg (duty in, freight out).
All goods from Taiwan · the whole tariff ledger · 12 CBP rulings cite this code · reproduce: tariff_story(hs: "8431.39", origin: "Taiwan") via /connect. Not customs or legal advice.