Importers of HS 8428.90 (other machinery) from Korea, South actually paid 14.23% on the taxed portion of the value in 2026-06 — 13.62% 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% → 14.23%, with the largest single step +10.3pp in 2025-04. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 14.23%, so the trade-war overlay added 14.2 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8428.90", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 8428.90. The schedule base rate is Free; importers from South Korea actually paid 14.23% on the dutiable value in 2026-06 — the trade-war overlay added 14.2 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 14.23% (2026-06), largest single step +10.3pp in 2025-04.
Korea, South's lower duty (13.62% vs 37.62%) lets it price up to 21.1% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $3.3/kg vs $22.78/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · 7 CBP rulings cite this code · reproduce: tariff_story(hs: "8428.90", origin: "South Korea") via /connect. Not customs or legal advice.