Importers of HS 8417.90 (parts) from Korea, South actually paid 15% on the taxed portion of the value in 2026-06 — 15% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.9%. Over the window the rate on the taxed portion moved 3.9% → 15%, with the largest single step +53pp in 2025-12. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.9% — importers actually paid 15%, so the trade-war overlay added 11.1 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8417.90", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 8417.90. The schedule base rate is 3.9%; importers from South Korea actually paid 15% on the dutiable value in 2026-06 — the trade-war overlay added 11.1 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.9% (2023-07) → 15% (2026-06), largest single step +53pp in 2025-12.
All goods from South Korea · the whole tariff ledger · 1 CBP ruling cite this code · reproduce: tariff_story(hs: "8417.90", origin: "South Korea") via /connect. Not customs or legal advice.