Importers of HS 9031.80 (other) from Taiwan actually paid 9.96% on the taxed portion of the value in 2026-06 — 9.51% 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% → 9.96%, with the largest single step -11.6pp in 2026-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 9.96%, so the trade-war overlay added 10 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "9031.80", origin: "Taiwan") · see it at trimtabist.com/tariffs
HS 9031.80. The schedule base rate is Free; importers from Taiwan actually paid 9.96% 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) → 9.96% (2026-06), largest single step -11.6pp in 2026-03.
Taiwan's lower duty (9.51% vs 33.72%) lets it price up to 22.1% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $17.76/kg vs $60.52/kg (duty in, freight out).
All goods from Taiwan · the whole tariff ledger · 20 CBP rulings cite this code · reproduce: tariff_story(hs: "9031.80", origin: "Taiwan") via /connect. Not customs or legal advice.