Importers of HS 8523.51 (solid-state non-volatile storage devices) from Korea, South actually paid 10.01% on the taxed portion of the value in 2026-06 — 0% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is Free. Over the window the rate on the taxed portion moved null% → 10.01%, with the largest single step -15pp in 2025-12. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 10.01%, so the trade-war overlay added 10 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8523.51", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 8523.51. The schedule base rate is Free; importers from South Korea actually paid 10.01% on the dutiable value in 2026-06 — the trade-war overlay added 10 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 10.01% (2026-06), largest single step -15pp in 2025-12.
2 Chapter-99 measures name Korea, South; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from South Korea · the whole tariff ledger · 1 CBP ruling cite this code · reproduce: tariff_story(hs: "8523.51", origin: "South Korea") via /connect. Not customs or legal advice.