Brazilian granite, marble and slate now enter the US carrying an additional 37.5% in duties under two separate Section 301 actions that took effect two days apart in late July 2026. The actions were reported on August 27, 2026.
The first action imposed 25%, effective July 22, 2026, following a USTR investigation initiated in July 2025. The second imposed 12.5%, effective July 24, 2026, and covers 60 economies that the USTR determined failed to impose or enforce a ban on imports made with forced labor.
The duties stack on each other and on top of ordinary customs duties. Quartzite classified in HTSUS subheading 6802.99.00 remains exempt from the 25% action but is still subject to the 12.5% forced-labor action.
Two Section 301 actions
The additional duties arise from two actions with separate effective dates. Action 1 is a 25% duty effective July 22, 2026, from a USTR investigation initiated in July 2025. Action 2 is a 12.5% duty effective July 24, 2026. The second action covers 60 economies and targets countries the USTR determined failed to impose or enforce a ban on imports made with forced labor.
The two-day spacing between the effective dates matters because the actions are separate. The reported treatment is not a single 37.5% action. It is a 25% action plus a 12.5% action, with both applicable to Brazilian granite, marble and slate and with ordinary customs duties also remaining relevant.
Reported action terms
- Action 1: 25%, effective July 22, 2026.
- Action 2: 12.5%, effective July 24, 2026.
- Action 2 coverage: 60 economies.
- Combined additional duty on granite, marble and slate: 37.5%.
Fabio Cruz, VP of Centrorochas, described the combined result as: it's 25 plus 12.5 for granites, marbles, slates, all those stones.
Stone products and quartzite
The stated 37.5% combined additional duty applies to Brazilian granite, marble and slate. Buyers reviewing granite slabs should therefore distinguish those products from quartzite when discussing the two actions.
Quartzite in HTSUS subheading 6802.99.00 remains exempt from the 25% action. That exemption is partial, not a full exemption from the reported measures: quartzite remains subject to the 12.5% forced-labor action, with no exemption for the second action.
This product treatment makes the classification detail central to the reported distinction. The applicable outcome for quartzite is 12.5% from the second action, while the stated outcome for granite, marble and slate is the combined 37.5% additional duty. The comparison does not remove ordinary customs duties from either discussion.
For product context, Brazilian-style quartzite illustrates the quartzite category used in material conversations. The source context on Brazil's exports and quartzite is available in the Brazil H1 stone exports report.
Duty stacking
Duty stacking is the core commercial point in the reported actions. For granite, marble and slate, the 25% and 12.5% duties are added together: 25% + 12.5% = 37.5%. The combined figure is additional to ordinary customs duties.
For quartzite under HTSUS 6802.99.00, the 25% action does not apply, but the 12.5% action does. The record therefore supports a product-specific comparison rather than a single duty assumption for all Brazilian natural stone. The effective dates also remain separate even though the measures now operate together for the named products.
Procurement records can state the product category, the relevant action and the reported additional-duty treatment. That approach preserves the difference between a 37.5% combined additional duty for granite, marble and slate and the 12.5% action that still applies to the specified quartzite subheading.
What it means for buyers
Buyers and importers should identify the stone category before using the 37.5% figure in a quotation. Brazilian granite, marble and slate carry the reported combined additional duty, while quartzite in HTSUS subheading 6802.99.00 is exempt from the 25% action but remains subject to the 12.5% action.
Contract and purchasing discussions can separate the two Section 301 actions, their effective dates and ordinary customs duties. This keeps the stated 25% plus 12.5% calculation tied to the granite, marble and slate categories named in the report rather than applying it automatically to quartzite.
For quartzite purchases, a buyer can document the HTSUS subheading and the remaining 12.5% forced-labor action. For granite, marble and slate purchases, the record can document that both additional duties stack and that ordinary customs duties are additional. These distinctions are relevant to cost assumptions, product descriptions and entry documentation.
The action dates also provide a clear review point for orders affected by late-July 2026 entry timing. The useful factual comparison is not a forecast about future tariffs; it is the reported treatment now attached to the named stone products under the two separate Section 301 actions.
The two-action structure is also a useful control for product comparisons. The 25% action began July 22 and the 12.5% action began July 24. Both apply to the named granite, marble and slate categories, and ordinary customs duties remain additional. The specified quartzite exception applies only to the first action; it does not create an exemption from the 12.5% forced-labor action.
