Importers of HS 3401.30 (containing any aromatic or modified aromatic surface-active ) from Korea, South actually paid 9.49% on the taxed portion of the value in 2026-06 — 9.49% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4%. Over the window the rate on the taxed portion moved null% → 9.49%, with the largest single step -12.3pp in 2025-12. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4% — importers actually paid 9.49%, so the trade-war overlay added 5.5 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3401.30", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 3401.30. The schedule base rate is 4%; importers from South Korea actually paid 9.49% on the dutiable value in 2026-06 — the trade-war overlay added 5.5 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 9.49% (2026-06), largest single step -12.3pp in 2025-12.
Korea, South's lower duty (9.49% vs 27.26%) lets it price up to 16.2% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $1.87/kg vs $11.28/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · 1 CBP ruling cite this code · reproduce: tariff_story(hs: "3401.30", origin: "South Korea") via /connect. Not customs or legal advice.