Decision Ensures Refund of 10 Years of Amounts Unduly Paid for ICMS, with Corrected and Mandatory Refund by Distributors, Says Lawyer Carlos Mendes.
The Supreme Federal Court (STF) confirmed in a definitive decision that consumers will be able to reclaim up to 10 years of amounts unduly paid for ICMS on electricity bills. The refund must be made by energy distributors, in a mandatory, corrected manner and with interest. According to lawyer Carlos Mendes, this is one of the biggest victories for Brazilian consumers in recent years.
In practice, millions of people who paid electricity bills will be entitled to a full refund.
The decision brings legal security and establishes an important milestone, as there had been no clarity for a long time on how and when the amounts charged excessively would be refunded.
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How the Judicial Dispute Began
The discussion about amounts unduly paid for ICMS originated in 2017, when the STF judged General Repercussion Theme 69 and concluded that ICMS could not be included in the calculation base of PIS and COFINS.
This charge, deemed illegal, had been artificially inflating the value of electricity bills across the country.
For years, only consumers and companies that filed lawsuits were able to obtain refunds.
Meanwhile, the distributors received millions from the Union, without clear rules to ensure that these funds reached the end consumer.
The Role of the Law and ANEEL
In 2022, Congress approved Law No. 14,385/2022, which amended Law No. 9,427/1996 and determined that ANEEL (National Electric Energy Agency) should regulate the refund process.
The rule was challenged in court, but the STF confirmed its constitutionality in 2023.
From this decision, it was established that the reimbursement must be complete, with monetary correction and interest, deducting only specific fees and taxes.
The maximum period was set at 10 years from the date each distributor received the funds from the Union, ensuring that consumers are not harmed by delays or administrative maneuvers.
Who Is Entitled and How to Request
According to lawyer Carlos Mendes, any consumer who paid electricity bills in the last 10 years may be entitled to a refund of the amounts unduly paid for ICMS.
To prove this, it is necessary to present energy bills or request complete statements directly from the distributors, which are required to provide the documentation.
Another key point is that the judiciary requires detailed technical calculations.
It is not enough to claim the right: it is necessary to present spreadsheets prepared by accountants or experts, indicating exactly what was overpaid in each period.
Is It Worth Filing a Lawsuit?
The STF’s decision is definitive and cannot be appealed, which guarantees full legal security.
But there is an essential detail: actions must be filed within the period of 10 years from the date of the refund made to the distributor.
Therefore, experts warn that it is necessary to act quickly to avoid losing the right.
In many cases, the amounts involved can be significant. For families facing ever-increasing electricity bills, this refund represents not only relief in the budget but also the recovery of money paid illegally over a decade.
Financial and Social Impact
The recognition of the right to a refund of amounts unduly paid for ICMS could mobilize billions of reais nationwide.
In addition to compensating the consumer, the measure strengthens transparency in the electric sector and pressures distributors to adopt fairer practices.
According to Carlos Mendes, “this decision shows that consumers cannot be treated as the most vulnerable part of the chain.
What was charged excessively must, necessarily, return to those who paid it.”
The STF has consolidated one of the greatest recent advancements in consumer rights.
Millions of Brazilians will have the right to recover 10 years of amounts unduly paid for ICMS, with correction and interest, but the process requires documentation and specialized monitoring.
And you? Have you checked if you may be entitled to a refund of these amounts unduly paid for ICMS? Do you think this decision will actually benefit consumers or are you concerned that bureaucracy will get in the way?
Leave your opinion in the comments; we want to hear from those who experience this reality in practice.


Esso é o que se chama de direito!!!!!!!!!!!
Posso estar falando bobagem, mas esse imposto recebido foi repassado pela concessionária ao Estado de origem, tanto que a devolução cabe ao Poder Estadual. 10 anos recebendo indevidamente e agora com a cara de **** estão dando direito a devolução. Contratar perito para fazer os cálculos, tem que pagar na hora. Se for ajuizado e não administrativo tem que pagar advogado, sobra o que para um consumidor que pagou 8 a 10 reais por mês de icms ao estado e vai receber em forma de crédito nas faturas? Totalmente inviável. Brasil o país do ilusionismo.
Cortina de fumaça para os crimes que eles andam cometendo contra a constituição