Importers of HS 8703.21 (of a cylinder capacity not exceeding 1,000 cc) from Taiwan actually paid 18.01% on the taxed portion of the value in 2026-06 — 18.01% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2.5%. Over the window the rate on the taxed portion moved 2.5% → 18.01%, with the largest single step +13.7pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2.5% — importers actually paid 18.01%, so the trade-war overlay added 15.5 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8703.21", origin: "Taiwan") · see it at trimtabist.com/tariffs
HS 8703.21. The schedule base rate is 2.5%; importers from Taiwan actually paid 18.01% on the dutiable value in 2026-06 — the trade-war overlay added 15.5 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2.5% (2023-07) → 18.01% (2026-06), largest single step +13.7pp in 2025-09.
Taiwan's lower duty (18.01% vs 49.05%) lets it price up to 26.3% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $11.69/kg vs $11.99/kg (duty in, freight out).
15 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 · 2 CBP rulings cite this code · reproduce: tariff_story(hs: "8703.21", origin: "Taiwan") via /connect. Not customs or legal advice.