The measure applies to South Africa, Nigeria, Egypt, Morocco, Algeria, Angola and Libya. The move raises policy risk for exporters, but broad product exemptions mean the effect will vary sharply by sector.

Tariff takes effect after Section 301 probe

The United States Trade Representative opened investigations into 60 economies on 12 March. Initial hearings followed on 28 and 29 April. USTR then said the countries’ policies were actionable on 2 June. It proposed a 12.5% tier for economies without accepted forced-labour import prohibitions, and a 10% tier for those with qualifying regimes.

Written comments closed on 6 July. USTR held a second hearing round from 7 to 9 July, with more than 100 witnesses testifying. The final action was announced on 23 July, and the duties took effect at 12:01 a.m. Eastern Time on 24 July. A limited in-transit exception applied to qualifying goods loaded before the deadline and entered before 28 July.

South Africa engaged directly in the process. It made written submissions, held consultations and testified. Pretoria argued that its law already allows restrictions on goods made with forced labour. It also sought an exemption. The request was not granted.

Exemptions blunt the impact

The US 12.5% tariff is not a blanket tax on all exports from the affected countries. Product treatment depends on customs classification. Goods already covered by certain U.S. national-security tariffs are not charged again under this action.

That matters for South Africa in particular. Vehicles and auto components are exempt because they already sit under Section 232 measures. Steel and aluminium are also excluded for the same reason. South African officials also listed macadamia nuts, oranges, limes, tea, spices, seeds, cane sugar, citrus juice, syrups, some chemicals, critical minerals, platinum-group metals, precious metals, isotopes, civil aircraft and pharmaceuticals among exempt products.

Other African exporters face similar product-level limits, depending on the tariff annexes. The White House said exemptions cover selected goods that could create U.S. supply shortages or broader economic disruption. That means the headline rate will hit some lines hard, while leaving others untouched.

For investors, the key issue is not only the tariff rate itself. It is also the spread between exposed and exempt product lines. Companies selling into the United States must now decide whether to absorb the cost, raise prices, renegotiate contracts or divert supply elsewhere.

South Africa’s exposure is especially sensitive because the United States remains an important market for higher-value exports. The new duties also arrive as trade uncertainty continues to weigh on the value of longstanding preferences. That makes diversification more urgent for exporters and more important for capital allocators tracking margins.

The next watchpoint is whether affected firms adjust pricing and routing quickly enough to preserve access, or whether the tariff begins to reshape African export flows more permanently.

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