Normal-regime taxpayers first (Lucro Real and Lucro Presumido, CRT=3); Simples Nacional and MEI from 2027. Applies across NF-e, NFC-e and municipal NFS-e, each with its own layout track.
3 August 2026 is a rejection date, not a soft deadline — an NF-e without the IBS/CBS group is refused. This date is now confirmed: no deferral was enacted for normal-regime rejection (the only July 2026 postponement pushed individual CNPJ registration to 1 Jan 2027, which does not touch it). Municipal NFS-e layouts move on their own timetables — São Paulo City, for one, is reworking its NFS-e layout for the reform, so confirm the current municipal version directly rather than assuming a national plan covers it.
0 of 5 are primary sources. Mandate dates move — treat this page as a starting point and confirm against the primary source before committing a plan.
Work hands-on with the EN 16931 formats behind this mandate — no login, nothing uploaded.
Scrub the Brazil timeline and watch an invoice become the document each deadline will require.
Open time machine →Open a UBL, Factur-X or XRechnung file and read every EN 16931 field.
Open viewer →Generate a well-formed sample invoice to test your mapping.
Open generator →A page is a starting point. A scoped analysis gives you the specification, the mapping and the effort — in weeks, not quarters.
