Law 15,270 and Foreign Investors in Brazil

While Brazil has been actively aligning its tax system with international standards—notably through new transfer pricing rules and Pillar Two implementation—the enactment of Law 15,270/2025 introduces a controversial friction point. The law imposes a 10% Withholding Income Tax (WHT/IRRF) on dividends distributed to non-residents, rekindling a critical debate: does this distinct treatment violate the non-discrimination principle established in Brazil’s tax treaties and domestic legislation? 

The Conflict: Residents vs. Non-Residents

The primary concern for foreign investors lies in the disparity between domestic and cross-border distributions. Under Law 15,270/2025, non-residents face a flat 10% rate, whereas residents benefit from specific thresholds and a progressive scale:

  1. an annual exemption for individual residents who earn up to BRL 600,000 in total dividend income;
  2. a progressive tax rate for residents of up to 10% applied on amounts between BRL 600,000 and BRL 1.2 million per year while non-residents are subject to a 10% flat rate on any amount distributed;
  3. a monthly exemption limit of BRL 50,000 for payments from the same company that does not apply to non-residents;
  4. a distinct taxation mechanism compared to residents, particularly regarding the absence of WHT on remittances to domestic legal entities.

The different or more burdensome taxation triggers the non-discrimination clauses found in Article 24 of most Double Tax Treaties (DTTs), besides local legal provisions.

DTT and Domestic legal framework

In the context of DTT, a technical nuance currently under scrutiny is the expression "in particular with respect to residence" found in the OECD Model Convention. 

While traditionally the OECD views this phrase as clarifying that residents and non-residents are not in the same situation, Brazil formally reserved the right to omit this specific wording from its treaties between 1997 and 2005.

For investors from jurisdictions where the treaty omits this phrase (such as Austria), there is a compelling legal argument: by historically removing the "residence" qualifier, Brazil signaled that residence alone may not be a valid ground for tax discrimination. 

On the other hand, the argument for non-discrimination is also boosted by Brazil's domestic legal framework. While the principle was traditionally rooted in Law 4,131/1962, it is now anchored in Article 9 of Law 14,286 (the "Legal Framework for the Foreign Exchange Market"). This provision reinforces the parity of treatment between foreign and national capital, stipulating that foreign capital shall be given identical legal treatment to domestic capital under equal circumstances. When read alongside Article 150, II of the Federal Constitution, this creates a formidable barrier against tax measures that target investors solely based on their non-resident status. 

Judicial Precedents: STJ and STF

The Brazilian Judiciary has previously sided with taxpayers on similar grounds. A landmark case involved Volvo (REsp 426,945), where the Superior Court of Justice (STJ) ruled that taxing dividends to a Swedish parent company—while exempting domestic ones—violated the non-discrimination clause. The STJ emphasized that if non-discrimination is a domestic constitutional principle, it must be upheld internationally. Although a later appeal to the Supreme Court (STF) ended in a tie, the STJ’s pro-taxpayer position prevailed. 

Conclusion

Law 15,270/2025 represents a strategic shift in Brazil's revenue collection but faces an immediate uphill battle against entrenched legal protections for foreign capital. For investors located in treaty jurisdictions, the historical omission of the "residence" qualifier in Brazil’s earlier treaty models offers an avenue to challenge the 10% withholding tax as a direct violation of international obligations. However, the protection extends even to those without treaty coverage; the mandate for parity under Article 9 of Law 14,286, combined with the constitutional prohibition of unequal treatment among taxpayers in equivalent situations, provides a robust basis for all foreign investors to demand the same benefits—including the BRL 600,000 annual exemption, the BRL 50,000 monthly threshold and the progressive tax rate —currently reserved for residents.