Importers of HS 7615.10 (cast) from Vietnam actually paid 28.1% on the taxed portion of the value in 2026-06 — 23.19% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.1%. Over the window the rate on the taxed portion moved 3.1% → 28.1%, with the largest single step +14.8pp in 2025-03. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.1% — importers actually paid 28.1%, so the trade-war overlay added 25 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "7615.10", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 7615.10. The schedule base rate is 3.1%; importers from Vietnam actually paid 28.1% on the dutiable value in 2026-06 — the trade-war overlay added 25 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.1% (2023-07) → 28.1% (2026-06), largest single step +14.8pp in 2025-03.
Vietnam's lower duty (23.19% vs 30.99%) lets it price up to 6.3% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $4.86/kg vs $6.82/kg (duty in, freight out).
15 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 · 7 CBP rulings cite this code · reproduce: tariff_story(hs: "7615.10", origin: "Vietnam") via /connect. Not customs or legal advice.