The Superior Court of Justice (STJ) in Brazil ruled on Tuesday that contributions to the PIS (Program of Social Integration) and Cofins (Contribution for the Financing of Social Security) are to be included in the calculation base for the Corporate Income Tax (IRPJ) and Social Contribution on Net Income (CSLL) when calculated under the presumed profit system. The ruling was made unanimously by the 1st Section of the court, following a repetitive theme analysis where the court decided against appeals from taxpayers. The decision emphasizes the complexities of tax systems and the presumptive profit calculation method.

The court's rapporteur, Minister Paulo Sérgio Domingues, noted that this presumed profit regime was designed to simplify tax calculation, relieving businesses from the burden of maintaining detailed accounting records. However, he also pointed out that this simplicity comes with limitations on deduction opportunities for taxpayers, highlighting a trade-off inherent in the system. The court concluded that including PIS and Cofins in the taxable income base aligns with the overarching goals of the tax framework.

Additionally, Minister Domingues dismissed the need for modulating the effects of the decision, arguing that the case did not involve a change in established jurisprudence, nor did it pose a significant potential shift in taxpayer behavior. This ruling will have implications for Brazilian businesses operating under the presumed profit regime, indicating a stricter interpretation of taxable income and potentially affecting their overall tax liabilities.