If you profit from slavery, you lose your right to do business here.
In a country where the wounds of forced labor have never fully healed, Brazil's Supreme Court affirmed on Wednesday that states need not wait for federal permission to act against corporate complicity in slavery. Nine of ten justices upheld a São Paulo law stripping companies of their tax standing when they profit from enslaved or near-enslaved labor, finding that the power to combat human exploitation belongs not to one level of government alone, but to all. The ruling transforms a 2013 state statute into a national template, already echoed in five other states, and sends a clear message to supply chains built on suffering: economic consequence is now a tool of moral accountability.
- A decade-old São Paulo law hung in constitutional uncertainty, challenged by a powerful business confederation arguing that states had no right to punish companies for what their suppliers do.
- The National Confederation of Commerce warned the law blurred the line between state tax authority and federal labor inspection, threatening to unravel the constitutional division of powers.
- Justice Nunes Marques threaded the needle — upholding the law but requiring proof of knowledge or negligence and full administrative due process before any company loses its right to operate.
- Chief Justice Barroso reframed the entire dispute: the state is not inspecting labor, it is simply imposing tax consequences for what federal inspectors have already found.
- Only one justice dissented, and even a former ally of that position reversed course after oral arguments, leaving the law validated by an overwhelming majority.
- The ruling now stands as precedent for five other states with similar laws, making supply-chain due diligence a legal obligation across a growing portion of Brazilian territory.
Brazil's Supreme Court voted decisively on Wednesday to uphold a São Paulo law that revokes the tax registration of companies found to be sourcing goods made through slave labor or its equivalent. Nine justices formed a clear majority, with only Justice Dias Toffoli dissenting, in a ruling that affirms the right of states to use their economic authority against corporate complicity in labor exploitation.
The 2013 law targets businesses that knowingly or negligently purchase merchandise from manufacturers relying on enslaved or near-enslaved workers. The penalty — loss of ICMS registration, without which a company cannot legally operate in Brazil's tax system — had been challenged by the National Confederation of Commerce, which argued that São Paulo had overstepped its constitutional role by punishing companies for the acts of third parties and by encroaching on federal labor inspection authority.
Justice Nunes Marques, the case's rapporteur, rejected both arguments while adding a constitutional guardrail: punishment can only follow proof, established through full administrative due process, that a company knew or should have known slave labor was embedded in its supply chain. Chief Justice Barroso reinforced this reasoning, noting that the law imposes no new duties on federal agencies — it simply applies tax consequences to violations that federal labor inspectors have already identified.
Barroso proposed three formal theses that became the majority's foundation: state anti-slavery laws do not usurp federal inspection authority; bans on operating in the same sector do not violate federal commercial powers; and all sanctions must be preceded by due process. Justice Alexandre de Moraes, who had initially sided with Toffoli in an earlier virtual vote, reversed his position after hearing oral arguments.
The decision carries weight beyond São Paulo. Barroso noted that five other states — Mato Grosso, Paraíba, Bahia, Amazonas, and Goiás — have already adopted similar legislation, and the ruling now provides those laws with constitutional backing. For companies operating across Brazil, due diligence in sourcing has become not merely an ethical consideration but a legal condition of doing business.
Brazil's Supreme Court moved decisively on Wednesday to uphold a São Paulo law that strips companies of their tax registration when they traffic in goods made through slave labor or its equivalent. The court's plenary session formed a clear majority—nine justices voting to validate the statute, with only one dissenting—in what amounts to a landmark affirmation of state power to police corporate complicity in labor exploitation.
The law in question, enacted in 2013, targets businesses that knowingly or negligently source merchandise from manufacturers using enslaved or near-enslaved workers. When violations are found, the penalty is severe: revocation of the company's ICMS registration, which is essential to operating in Brazil's tax system. The National Confederation of Commerce, Services and Tourism had challenged the statute, arguing that São Paulo had overstepped its constitutional bounds by imposing criminal liability on businesses for the acts of third parties, and that the state had invaded federal territory by delegating labor inspection duties to its tax authority rather than leaving such work to federal agencies.
The court's majority, led by Justice Nunes Marques in his role as rapporteur, rejected both objections. Marques voted to uphold the law while imposing a constitutional interpretation that tightens its application: companies and their partners can only be punished if there is proof—established through administrative proceedings with full due process protections—that they knew or should have suspected slave labor was embedded in their supply chains. The punishment, in other words, cannot be automatic or absolute. It requires evidence of either intentional wrongdoing or culpable negligence. Marques reasoned that the Constitution grants both the federal government and the states concurrent authority to combat poverty and marginalization, and that São Paulo had simply exercised that shared power.
Chief Justice Luís Roberto Barroso, who had requested the case be heard in open court rather than decided virtually, amplified this reasoning. He noted that São Paulo's law has already inspired similar legislation in five other states—Mato Grosso, Paraíba, Bahia, Amazonas, and Goiás—making it a model for anti-slavery enforcement across the country. Barroso emphasized that the law does not impose any obligation on federal agencies; it merely punishes companies that federal labor inspectors have already identified as sourcing from slave-labor producers. The state is not usurping federal inspection authority. It is simply using its tax power to enforce consequences for what federal authorities have already uncovered.
Barroso proposed three formal theses for the court's judgment: that state laws penalizing companies for trafficking in slave-made goods do not violate federal labor inspection authority; that bans on operating in the same industry do not violate federal commercial law powers; and that all sanctions must be preceded by administrative due process with full opportunity for the accused to contest the charges and present evidence. These theses became the backbone of the majority position.
Justice Dias Toffoli cast the sole dissent, arguing that São Paulo had indeed invaded federal territory by establishing its own labor inspection and punishment regime. But even Toffoli stood alone. Justice Alexandre de Moraes, who had initially voted with Toffoli in the virtual phase, changed course after hearing the oral arguments, concluding that the law imposed no new burden on federal agencies and therefore did not constitute an unconstitutional intrusion.
The ruling is significant not only for what it permits but for what it signals about the court's willingness to allow states to weaponize their economic power against corporate participation in labor crimes. The law does not require federal permission or coordination. It does not create new federal duties. It simply says: if you profit from slavery, you lose your right to do business here. For workers trapped in conditions of servitude, the decision opens a new avenue of pressure on the supply chains that exploit them. For companies, it means that due diligence in sourcing is no longer merely a matter of corporate ethics or federal compliance—it is now a condition of operating across multiple Brazilian states.
Citas Notables
The punishment can only extend to partners who participated, through action or omission, in acquiring products made with slave labor.— Justice Nunes Marques
Both the federal government and the states have concurrent authority to combat poverty and marginalization, so São Paulo was exercising shared constitutional power.— Justice Nunes Marques
La Conversación del Hearth Otra perspectiva de la historia
Why did the business confederation think this law overstepped?
They argued the state was essentially doing federal labor inspection work—that only the federal government should decide whether slave labor exists in a supply chain. They also said companies were being punished for what third parties did, without any proof the company itself knew or intended it.
And the court disagreed on both counts?
Yes. The majority said the state wasn't doing labor inspection—federal agencies already do that. São Paulo is just using its tax authority to punish what federal inspectors have already found. That's a different power, and states have it.
So the company has no defense?
Actually, the opposite. The court required proof of knowledge or negligence before any punishment. You can't just revoke a company's tax status because slave labor existed somewhere in the chain. You have to show the company knew or should have known.
Why did one justice change his mind?
Moraes initially thought it was federal overreach. But after hearing arguments, he realized the law doesn't impose any new duty on federal agencies. It just uses state tax power to enforce consequences. That distinction mattered.
Has this law actually worked?
It's inspired five other states to pass similar laws. That suggests it's been seen as effective enough to copy. Whether it's actually reduced slave labor in supply chains is harder to measure, but the court clearly thinks it's a legitimate tool.
What happens now?
Companies operating in São Paulo and those other states will need to be more careful about where they source goods. The law is now on solid constitutional ground, so the threat of losing tax registration is real.