The enactment of Brazil’s Tax Reform, promulgated via Constitutional Amendment 132 in December 2023, established a new framework for consumption taxes in Brazil. With the creation of the Goods and Services Tax (IBS), the Contribution on Goods and Services (CBS), and the Selective Tax, Brazilian companies and foreign investors with operations in the country must prepare for a significant operational transition. Although current taxes will only be fully phased out in 2033, 2026 and 2027 mark the start of the practical implementation of the new system.
The Adaptation Timeline for Tax Invoices
One of the first direct impacts on corporate routines will be the adaptation of electronic invoicing systems. The Receita Federal (Brazil’s Federal Revenue Service) and the CGIBS (the Management Committee of the IBS) have outlined a phased schedule to adapt electronic tax documents to the new calculation and reporting rules. Companies should verify the availability of necessary updates with their technology providers and accounting teams.
The main deadlines established for the adaptation of tax documents are:
- August 3, 2026: Start of adaptation for NF-e, NFC-e, CT-e, CT-e OS, MDF-e, GTV-e, NF3e, and NFS-e Via.
- October 1, 2026: Deadline for NFCom and most services documented via NFS-e.
- December 1, 2026: Start for NFGas, NFAg, specific passenger transport documents, and specific NFS-e cases.
- January 1, 2027: Deadline for companies under the Simples Nacional regime and for the Single Import Declaration (Duimp).
- January 4, 2027: Start of mandatory adaptation for Individual Microentrepreneurs (MEI).
Rules and Deadlines for the Simples Nacional Regime
Companies enrolled in Simples Nacional (Brazil’s simplified tax regime for small businesses) will face specific rules during the transition. For 2027, these businesses may choose whether to pay IBS and CBS within the simplified regime or through the regular tax calculation regime.
Opting for the regular regime requires strict attention to deadlines: the election must be formalized between September 1 and September 30, 2026, valid for the first half of 2027. This same September 2026 window applies to companies not currently in Simples Nacional that plan to join the regime the following year. Notably, this option does not apply to Individual Microentrepreneurs (MEI).
The Tax Transition: From 2026 to 2033
The Tax Reform timeline provides for a gradual replacement of existing taxes to prevent abrupt shocks to the economy and revenue collection. The transition process will follow these main phases:
- 2026: Initial implementation of a single trial rate of 1% (0.9% for CBS and 0.1% for IBS). These amounts will be credited against federal PIS and Cofins contributions.
- 2027: The reform takes full effect with the collection of the new CBS and the definitive elimination of PIS and Cofins. Rates for the federal excise tax (IPI) will also be reduced to zero, except for products manufactured in the Manaus Free Trade Zone.
- 2029 to 2032: Rates for state ICMS and municipal ISS will gradually decrease, while the IBS rate will increase proportionally.
- 2033: The new IBS will be fully implemented, finalizing the phase-out of ICMS and ISS.
Practical Considerations for Companies
The primary takeaway from the official schedule is that companies should not postpone the adaptation process until January 2027. Compliance requires early planning, including reviewing proprietary or third-party invoicing software and updating accounting and financial enterprise systems.
Beyond systems, transitioning to IBS and CBS will demand a thorough review of commercial contracts, pricing policies, and profit margins before the new model takes effect. Early coordination with accountants and technical leads is essential to ensure that the calculation and filing of the new taxes comply with the requirements of the Receita Federal and the CGIBS.
This content is for informational purposes only and does not constitute legal advice. For guidance on specific matters, consult a qualified lawyer.

