Key Takeaways:
- Brazil tax arbitration could offer a faster route to settle fiscal disputes and reduce judicial congestion.
- PLC 124/2022 and PL 2486/2022 would update the tax code and create an institutional framework for arbitration.
- International precedents like Portugal show arbitration can be structured with public rulings and specialised tribunals.
- Businesses and the treasury stand to gain from lower costs, greater legal certainty and quicker resolution of claims.
Brazil is advancing plans to introduce tax arbitration as an alternative mechanism to resolve disputes between taxpayers and the state, a development that supporters say could ease the heavy burden on the country’s courts.
Brazil tax arbitration can speed dispute resolution
The Complementary Bill PLC 124/2022, which would amend the National Tax Code to permit arbitration in tax matters, has returned from the Chamber of Deputies to the Federal Senate and awaits a report before plenary voting. If approved, the Chamber may also deliberate PL 2486/2022, which establishes tax arbitration and already has a favourable rapporteur opinion.
Proponents argue that arbitration could provide a faster, more technical route to resolve fiscal controversies. Tax litigation has historically been one of the main drivers of judicial congestion in Brazil. The National Council of Justice report “Justice in Numbers” for 2024 shows that fiscal enforcement cases represented roughly 26% of pending proceedings, and the congestion rate for these cases was 73.8%. The average duration for closed fiscal enforcement cases last year was seven years and seven months.
By offering an alternative forum, arbitration could reduce the volume of cases before ordinary courts and shorten the time required for resolution. That would benefit both businesses and public finances. Corporations gain more predictable timelines for balance sheets, while the treasury would see disputes settled more quickly, reducing losses associated with prolonged litigation. Observers also note arbitration could deter habitual debtors who treat tax liabilities as a long-term financing strategy.
International examples provide a model for reform. Portugal adopted tax arbitration in 2011 through Decree-Law No. 10 and created specialised arbitration tribunals and the Administrative Arbitration Centre (CAAD). Those arrangements demonstrate that arbitration for tax matters can be institutionalised with transparent procedures and specialised decision-makers, often with expertise in law, economics and accounting.
Unlike private commercial arbitration, tax arbitration as proposed would maintain public rulings subject to judicial precedents, except where specific data are legally protected. This approach would preserve transparency and allow the development of a public bank of arbitral precedents to guide future decisions. The requirement to follow judicial precedent aims to align arbitral awards with established legal principles while retaining the procedural efficiency of arbitration.
Another practical benefit is specialisation. Most first-instance courts lack a defined focus on tax matters. The arbitration process is likely to be handled by arbitrators with tax law expertise and technical training in economic and accounting issues, improving the quality and consistency of decisions.
Critics will likely raise concerns over safeguards, access to justice and the balance between taxpayer rights and state interests. Lawmakers will need to ensure procedural guarantees, transparency and appropriate oversight so arbitration complements rather than supplants judicial review where necessary.
At its core, the proposal aims to modernise dispute resolution in one of Brazil’s most burdened areas of the legal system. If enacted, Brazil tax arbitration could deliver swifter outcomes, reduce litigation costs for the public purse and private parties, and provide greater legal certainty for investors and taxpayers alike.
