Importers of HS 3801.10 (plates, rods, powder and other forms, wholly or partly manuf) from Korea, South actually paid 10% on the taxed portion of the value in 2026-06 — 9.4% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.7%. Over the window the rate on the taxed portion moved 3.7% → 10%, with the largest single step +10pp in 2025-04. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.7% — importers actually paid 10%, so the trade-war overlay added 6.3 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3801.10", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 3801.10. The schedule base rate is 3.7%; importers from South Korea actually paid 10% on the dutiable value in 2026-06 — the trade-war overlay added 6.3 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.7% (2023-07) → 10% (2026-06), largest single step +10pp in 2025-04.
Korea, South's lower duty (9.4% vs 35.12%) lets it price up to 23.5% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Korea, South actually lands cheaper — $4.37/kg vs $6.65/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · reproduce: tariff_story(hs: "3801.10", origin: "South Korea") via /connect. Not customs or legal advice.