Two milestones collide in NFS-e this Thursday, October 1, 2026
If your tax, accounting, or IT team has noticed unusual activity in the testing and production environments of the Electronic Service Invoice (NFS-e) over the past few days, it's not just your imagination: today marks the simultaneous conclusion of two distinct timelines that have been running in parallel since the beginning of the year. One is about technical infrastructure (the migration from the ABRASF layout to the National Standard). The other is about tax content (the requirement to itemize IBS and CBS). Both deserve separate attention, as they require different adjustments to your systems.
Layer 1: the end of ABRASF 2.04 in municipalities that have already migrated
Article 62, §1, of Complementary Law No. 214/2025 establishes that all Brazilian municipalities are required, by January 1, 2026, to adopt the National Standard Electronic Service Invoice, using the layout and standards defined at the federal level, which eliminates any room for interpretation regarding the mandatory nature of adoption, regardless of the municipality's size or whether it has its own system.
The schedule, however, provided for a coexistence phase between the old and new layouts. The Federal District (DF) is a concrete example of this conclusion: the DF Secretariat of Economy moved up the production environment of the National NFS-e to facilitate adaptation, ahead of the mandatory deadline set for October 1, 2026, when the Abrasf 2.04 layout stops being accepted. In practice, as of today, only documents transmitted via the National Standard are accepted, and companies still using ABRASF 2.04 must have already adapted their issuance systems. The change particularly affects taxpayers who issue the NFS-e through their own systems integrated with the tax environment via Webservice.
It's worth emphasizing that this is not an isolated case in the DF: it illustrates what had already been established by law for the entire country. Other municipalities that granted a transition period may have similar cutoff dates now or in the coming weeks — so be sure to check with the city hall (or the municipal issuer) whether your company's tax ID is already subject exclusively to the National Standard requirement.
Layer 2: IBS and CBS now apply to most services
On the same day, another timeline moves forward, this one of a tax nature. The mandatory itemization of IBS and CBS on the NFS-e, initially scheduled for August 3, was postponed to October 1, 2026, now covering services subject to ISS that do not fall under the special situations listed in Joint Act RFB/CGIBS No. 4/2026. On the same date, the NFCom (communication services), the DIR (international package entry registration), and the first phase of the DeRE, related to taxpayer registry events, also take effect.
One point that is causing confusion among teams: until December 31, an invoice issued without the IBS and CBS groups will not be rejected by the national system. This does not make filling them in optional. This flexibility does not mean that filling out these fields has become optional: after the applicable mandatory date for each transaction, the absence of this information may characterize non-compliance of the tax document, even if the invoice is technically authorized.
What to check in the next few hours
For tax, accounting, and IT teams, the recommendation is to split the checklist into two fronts:
Infrastructure and integration: confirm whether the municipality of each business location already requires the National Standard exclusively; verify that your ERP or in-house issuer is pointing to the correct Webservice; run a test batch in the testing environment before blindly trusting production; review digital certificates and access credentials used in the integration.
Tax content: check whether the services provided by the company fall under the October 1 group or the December 1 exceptions group; confirm the NCM/NBS mapping and tax classification used to calculate IBS and CBS; and, even though there's no risk of automatic rejection at this time, treat non-compliance as a liability to be corrected as soon as possible — it could become a subject of tax audits once the flexibility period ends, in 2027.
This content is for informational purposes only and does not replace guidance from your accounting team, who should assess the company's specific situation and the deadlines applicable to each type of service. If your operation still depends on manual adjustments to keep up with this dual timeline, talk to Edoo: our team helps companies keep their tax issuance integrated and up to date within their ERP.
NFS-e Changes Its Foundation Today: End of ABRASF 2.04 and National Issuer as the Sole Gateway Starting October 1, 2026