Brazil’s Supreme Court Blocks São Paulo From Ending Amazon Trade Tax Break
BRAZIL · TAX · SUPREME COURT
Key Facts
- —The country Brazil is a federation of 26 states and a federal district, and each state levies its own sales tax, the ICMS. It is the country’s largest single tax, so states guard it closely.
- —The background Since 1992 a pact among all states has exempted from ICMS Brazilian-made industrial goods shipped to seven free trade areas in the Amazon, set up to offset their remoteness. The pact has no end date.
- —Why now São Paulo, the richest state, ended the exemption on its own from 31 December 2024. It later restored it by decree, but only until 30 September 2026, this Wednesday.
- —What happened On 24 September the Supreme Federal Court ruled 6 to 3 that São Paulo’s end date was unconstitutional. A state that has adopted such a benefit cannot drop it alone.
- —Who is who The suits were brought by the governors of Rondônia, Acre, Amapá and Roraima. Justice Cármen Lúcia wrote the majority opinion; Justice Luiz Fux led the dissent.
- —What it means for you Shops and factories in towns such as Boa Vista, Macapá and Tabatinga keep buying São Paulo goods free of the state tax. The Manaus Free Trade Zone, a separate regime, was not at issue.
- —Still open The written judgment is not yet published. It is unclear whether firms will recover tax São Paulo collected in 2025, the year the exemption lapsed.
Brazil’s Supreme Federal Court has stopped São Paulo from ending a tax break on goods sent to seven Amazon free trade areas. The court ruled that one state cannot quit, on its own, a tax deal struck by all of them.
The ruling on 24 September matters beyond the North. It limits how far Brazil’s richest state, and any other, can claw back tax benefits it once agreed to share.
What the court decided
The court heard four suits together, numbered ADI 7822, 7830, 7844 and 7848. They were filed by the governors of Rondônia, Acre, Amapá and Roraima, all states in Brazil’s North.
The majority held that São Paulo breached the constitution when a 2022 decree ended the exemption on 31 December 2024. It then set a rule for every state.
No state may revoke ICMS benefits “totally or partially” without following the constitution and federal law, the ruling’s thesis says.
Why São Paulo could not act alone
Tax breaks on ICMS must be agreed in Confaz, a council of the finance secretaries of every state. A 1975 law requires four-fifths of the states present to revoke such a benefit.
São Paulo argued that Confaz deals only authorise a benefit, so a state that adopts one may also drop it. Cármen Lúcia accepted the first half but not the second.
Once a state writes the exemption into its own law, she said, withdrawing it alone breaks the coordination that governs the tax. She warned of a kind of “fiscal war in reverse”.
Justices Alexandre de Moraes, Flávio Dino, Cristiano Zanin, Dias Toffoli and the court’s president, Edson Fachin, joined her. Luiz Fux, André Mendonça and Nunes Marques dissented.
The towns the ruling protects
The seven free trade areas are Tabatinga in Amazonas, Guajará-Mirim in Rondônia, and Boa Vista and Bonfim in Roraima. The others are Macapá and Santana in Amapá, and Cruzeiro do Sul and Brasiléia with Epitaciolândia in Acre.
Four sit on borders with Colombia, Peru, Bolivia or Guyana, far from the factories of the South-East. Federal laws created them between 1989 and 1994 to bring trade and jobs to the region.
Without the exemption, goods shipped from São Paulo to the North normally carry a 7 percent interstate rate. On a R$100,000 (about US$19,230) truckload, that is R$7,000 (about US$1,350), at the central bank rate of 25 September.
Cármen Lúcia called São Paulo’s rule “a regressive measure” against regional inequality. It would send ICMS to São Paulo “to the detriment of development in the free trade areas”, she said.
What São Paulo did
The exemption lapsed on 31 December 2024 and stayed off for almost all of 2025. São Paulo restored it in 2026 by a new decree, backdated to 29 December 2025 and running only to 30 September 2026.
The state then asked the court to drop the case as moot. The court refused, because the new decree left out most of 2025 and everything after this month.
Fux argued that states entering a benefit freely should be free to leave it. “Whoever holds the key to the safe knows whether it can grant an exemption or not,” he said in the session.
What comes next
Under the ruling, São Paulo cannot let the exemption lapse on its own when its temporary decree runs out on Wednesday. If it still wants the break gone, it must win four-fifths of the states in Confaz.
The ruling does not touch the Manaus Free Trade Zone, the much larger industrial regime around the Amazonas capital. It does not create new tax breaks, and it does not say whether firms will get back tax paid in 2025.
It also has a shelf life. Brazil’s 2023 tax reform replaces the ICMS with a new value-added tax, phased in between 2029 and 2033.
Frequently Asked Questions
What is ICMS?
ICMS is the sales tax charged by each of Brazil’s 26 states and the Federal District on goods and some services. It is Brazil’s largest single tax and is being replaced by a new value-added tax between 2029 and 2033.
Is this about the Manaus Free Trade Zone?
No. The ruling covers seven smaller free trade areas in five northern states. The Manaus Free Trade Zone, Brazil’s big industrial hub in the Amazon, has its own separate tax regime and was not at issue.
Can a Brazilian state cancel a tax break by itself?
Not one agreed through Confaz and adopted into its own law, the Supreme Federal Court ruled. Revoking it needs the approval of four-fifths of the states present in the council.
Does the ruling affect consumers outside the Amazon?
Not directly. It keeps goods sent from São Paulo to the seven areas free of the state tax, which mainly matters to businesses and shoppers in those towns.
Sources: Supreme Federal Court, press release on ADIs 7822, 7830, 7844 and 7848, 24 September 2026, Migalhas, 24 September 2026, Conjur, 24 September 2026, Radioagência Nacional, 24 September 2026, Amazonas Atual, 25 September 2026, Complementary Law 24 of 1975, Banco Central do Brasil, PTAX 25 September 2026 (5.1991 reais per US dollar). All retrieved 28 September 2026. More on the region: Manaus Industrial Hub Hits US$23.8bn in Half-Year Sales.
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