Importers of HS 8501.52 (exceeding 750 w but not exceeding 14.92 kw) from Vietnam actually paid 12.07% on the taxed portion of the value in 2026-06 — 11.98% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.7%. Over the window the rate on the taxed portion moved 3.7% → 12.07%, with the largest single step -8.6pp in 2026-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.7% — importers actually paid 12.07%, so the trade-war overlay added 8.4 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8501.52", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 8501.52. The schedule base rate is 3.7%; importers from Vietnam actually paid 12.07% on the dutiable value in 2026-06 — the trade-war overlay added 8.4 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.7% (2023-07) → 12.07% (2026-06), largest single step -8.6pp in 2026-03.
Vietnam's lower duty (11.98% vs 37.06%) lets it price up to 22.4% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Vietnam actually lands cheaper — $5.31/kg vs $6.66/kg (duty in, freight out).
2 Chapter-99 measures name Vietnam; 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 Vietnam · the whole tariff ledger · 1 CBP ruling cite this code · reproduce: tariff_story(hs: "8501.52", origin: "Vietnam") via /connect. Not customs or legal advice.