Importers of HS 3824.99 (fatty substances of animal or vegetable origin and mixtures ) from Korea, South actually paid 10.13% on the taxed portion of the value in 2026-06 — 9.2% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4.6%. Over the window the rate on the taxed portion moved 5% → 10.13%, with the largest single step -4.8pp in 2026-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4.6% — importers actually paid 10.13%, so the trade-war overlay added 5.5 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3824.99", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 3824.99. The schedule base rate is 4.6%; importers from South Korea actually paid 10.13% 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 5% (2023-07) → 10.13% (2026-06), largest single step -4.8pp in 2026-03.
Korea, South's lower duty (9.2% vs 35.34%) lets it price up to 23.9% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $5.86/kg vs $21.56/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · 38 CBP rulings cite this code · reproduce: tariff_story(hs: "3824.99", origin: "South Korea") via /connect. Not customs or legal advice.