Importers of HS 8504.23 (having a power handling capacity exceeding 10,000 kva) from Taiwan actually paid 13.46% on the taxed portion of the value in 2026-06 — 13.46% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 1.6%. Over the window the rate on the taxed portion moved 1.6% → 13.46%, with the largest single step -16.5pp in 2026-02. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 1.6% — importers actually paid 13.46%, so the trade-war overlay added 11.9 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8504.23", origin: "Taiwan") · see it at trimtabist.com/tariffs
HS 8504.23. The schedule base rate is 1.6%; importers from Taiwan actually paid 13.46% on the dutiable value in 2026-06 — the trade-war overlay added 11.9 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 1.6% (2023-07) → 13.46% (2026-06), largest single step -16.5pp in 2026-02.
China's lower duty (3.98% vs 13.46%) lets it price up to 9.1% above Taiwan at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $10.71/kg vs $19.33/kg (duty in, freight out).
2 Chapter-99 measures name Taiwan; 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 Taiwan · the whole tariff ledger · reproduce: tariff_story(hs: "8504.23", origin: "Taiwan") via /connect. Not customs or legal advice.