Importers of HS 8541.43 (photovoltaic cells assembled in modules or made up into pane) from Vietnam actually paid 9.65% on the taxed portion of the value in 2026-06 — 9.65% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is Free. Over the window the rate on the taxed portion moved 12.66% → 9.65%, with the largest single step +18.7pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 9.65%, so the trade-war overlay added 9.7 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8541.43", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 8541.43. The schedule base rate is Free; importers from Vietnam actually paid 9.65% on the dutiable value in 2026-06 — the trade-war overlay added 9.7 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 12.66% (2023-07) → 9.65% (2026-06), largest single step +18.7pp in 2025-05.
Vietnam's lower duty (9.65% vs 60%) lets it price up to 45.9% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Vietnam actually lands cheaper — $2.46/kg vs $6.58/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 · 3 CBP rulings cite this code · reproduce: tariff_story(hs: "8541.43", origin: "Vietnam") via /connect. Not customs or legal advice.