Importers of HS 8503.00 (other) from Taiwan actually paid 23.59% on the taxed portion of the value in 2026-06 — 23.59% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3%. Over the window the rate on the taxed portion moved 3.04% → 23.59%, with the largest single step -17.2pp in 2026-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3% — importers actually paid 23.59%, so the trade-war overlay added 20.6 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8503.00", origin: "Taiwan") · see it at trimtabist.com/tariffs
HS 8503.00. The schedule base rate is 3%; importers from Taiwan actually paid 23.59% on the dutiable value in 2026-06 — the trade-war overlay added 20.6 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.04% (2023-07) → 23.59% (2026-06), largest single step -17.2pp in 2026-03.
Taiwan's lower duty (23.59% vs 42.7%) lets it price up to 15.5% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Taiwan actually lands cheaper — $6.71/kg vs $7.83/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 · 10 CBP rulings cite this code · reproduce: tariff_story(hs: "8503.00", origin: "Taiwan") via /connect. Not customs or legal advice.