TLDR: Brazil’s sweeping tax reform, anchored by Constitutional Amendment 132, is replacing a tangle of overlapping taxes with a simplified dual VAT system. The transition is already triggering a new wave of disputes over credits, transition rules, and interpretation, and companies that don’t prepare now will likely end up fighting battles in court later.
Brazil has one of the most litigated tax systems on earth, and for good reason. Companies have spent decades arguing with tax authorities over a patchwork of federal, state, and municipal levies that rarely talk to each other cleanly. Now the country is tearing that system down and building a new one, and lawyers are watching the fallout in real time.
What the Reform Actually Changes
The core of the reform is Constitutional Amendment 132, approved in late 2023, which consolidates five separate taxes (PIS, Cofins, IPI, ICMS, and ISS) into two new value-added taxes. One sits at the federal level, the other splits between states and municipalities. The goal is to end the cascading effect where businesses paid tax on tax, a problem that made Brazilian compliance notoriously expensive.
Full implementation won’t happen overnight. The transition runs through 2033, with the old and new systems running in parallel for years. That overlap is exactly where the legal friction is starting to show up.
A Decade-Long Transition Creates Its Own Disputes
Running two tax regimes side by side sounds manageable on paper. In practice, it means companies have to track credits and obligations under both systems at once, and any mismatch becomes a potential audit trigger. Tax authorities and taxpayers don’t always agree on how credits earned under the old ICMS regime should carry over into the new system, and that disagreement is already landing in administrative courts.
Sector-Specific Carve-Outs Are Fueling New Claims
The reform includes reduced rates and exemptions for sectors like healthcare, education, and agriculture, plus a “selective tax” aimed at goods considered harmful to health or the environment. Every carve-out invites a fight over who qualifies. Expect disputes over classification, especially in industries that sit near the boundary of an exempt category, to become a steady source of new filings.
Why Litigation Is Picking Up Already
Brazilian courts are used to tax fights. What’s different now is the nature of the disputes. Instead of arguing over decades-old rules with settled case law behind them, lawyers are litigating questions nobody has answered yet. There’s no deep well of precedent to draw from, which means early cases are likely to set the tone for years of interpretation.
Companies with complex supply chains, particularly those operating across multiple states, are the most exposed. The old ICMS system varied significantly from state to state, and reconciling those historical differences against a single national framework is proving to be messier than the reform’s architects probably hoped.
The Role of the New Tax Courts
Part of the reform includes a reworked dispute resolution structure, including a new federal body meant to handle conflicts over the dual VAT more efficiently than the old system did. Whether that body actually speeds things up remains to be seen. Brazilian tax litigation has historically dragged on for years, sometimes over a decade, before reaching final resolution.
Early Signals From Administrative Rulings
Preliminary guidance from tax authorities has already sparked pushback from business groups, particularly around how input credits get calculated during the transition years. Trade associations representing manufacturing and logistics companies have flagged concerns that the transition rules, as currently drafted, could create temporary cash flow problems even for companies that will benefit from the reform long term.
What Businesses Should Be Doing Now
Waiting for a dispute to land before engaging a tax lawyer is the wrong move here. Companies that map out their exposure under both the old and new systems now are in a far better position than those that scramble once an audit notice arrives.
That means reviewing supply chain structures for products that might fall under the selective tax, auditing how credits are being recorded during the transition, and watching for sector-specific guidance as it gets published. Brazil’s tax authorities are still writing the rulebook in real time, so staying current isn’t optional.
Looking Ahead
Nobody expects Brazil’s tax litigation volume to shrink just because the system got simpler on paper. If anything, the next few years will probably produce more disputes, not fewer, as courts work through questions the old system never had to answer. For businesses operating in Brazil, the smart move isn’t to wait and see how this settles. It’s to get ahead of it before the first wave of audits hits.
