Importers of HS 9022.90 (radiation generator units) from Korea, South actually paid 10.37% on the taxed portion of the value in 2026-06 — 10.23% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 0.8%. Over the window the rate on the taxed portion moved 1.39% → 10.37%, with the largest single step +6.4pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 0.8% — importers actually paid 10.37%, so the trade-war overlay added 9.6 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "9022.90", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 9022.90. The schedule base rate is 0.8%; importers from South Korea actually paid 10.37% on the dutiable value in 2026-06 — the trade-war overlay added 9.6 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 1.39% (2023-07) → 10.37% (2026-06), largest single step +6.4pp in 2025-05.
Korea, South's lower duty (10.23% vs 33.28%) lets it price up to 20.9% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $18.54/kg vs $37.49/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · reproduce: tariff_story(hs: "9022.90", origin: "South Korea") via /connect. Not customs or legal advice.