Presidential Candidates Threaten Brazil's Landmark Tax Reform with Revision Proposals

The future of Brazil's long-sought, newly implemented consumption tax reform is being undermined by leading presidential candidates, whose proposals to reverse or substantially revise key elements are injecting significant fiscal uncertainty into the 2026 election cycle. The landmark reform, introduced via Constitutional Amendment No. 132 in 2023, is currently in a multi-year transition process set to overhaul Brazil’s complex indirect tax system and has only recently begun its implementation phase in 2026, creating a dual Value Added Tax (VAT) structure known as the IBS and CBS. The political risk to this key economic structural measure now comes from candidates who are seeking to dismantle or significantly alter the system before it even reaches maturity, a prospect that has already alarmed analysts and investors.

Challenger Flávio Bolsonaro (PL) is advocating for a "revamp" of the system, at one point proposing to delay implementation for a year to draft new rules, as his campaign promises to reverse tax increases on certain sectors. This position is paired with a pledge for a massive four-year, R$900 billion infrastructure investment program. This combination of tax reduction or revision and a commitment to colossal new public spending creates a profound structural fiscal risk, as there is no clear and detailed plan for fiscal compensation or a commensurate reduction in other mandatory expenditures.

Meanwhile, the incumbent Lula da Silva government defends the reform and is currently focused on the technical implementation, which includes the detailed regulation and the establishment of mechanisms like the cashback program for low-income families. While President Lula’s team is officially targeting a gradual fiscal adjustment designed to protect social programs, the campaign rhetoric from both sides has largely avoided the politically difficult discussions about how to rein in Brazil’s climbing gross public debt, which recently reached 82.5% of GDP. The lack of a credible, detailed plan to fund both the proposed tax changes and the enormous investment pledges is the primary cause for market anxiety.

For businesses operating in Brazil, the reform’s transition period was already forecast to be administratively challenging, running through 2033. The threat of a presidential administration scrapping or profoundly rewriting the rules halfway through this process creates a high degree of legal and economic uncertainty, forcing companies to question whether to invest the necessary capital into compliance systems for a tax framework that may not survive a change in government. The political promises are creating a direct conflict with the fiscal reality: both candidates are promising a more favorable tax and spending environment without offering a clear strategy to address the structural growth in mandatory spending, which economists note has steadily squeezed room for public investment.

What it touches: The uncertainty surrounding the tax reform directly impacts the outlook for Brazil’s fiscal accounts and perceived creditworthiness, a key factor for the Brazilian Real (BRL) and interest rates. Any move toward the substantial revision or delay of the reform, especially when coupled with massive unfunded spending like the R$900 billion infrastructure plan, is likely to increase the premium investors demand on Brazilian debt, potentially increasing the cost of financing for both the government and private sector.