Brazil fixes the mandatory CBS/IBS start date for each electronic fiscal document type
This page records one dated change. For the rules in Brazil as they stand today, see the Brazil guide →
- Jurisdiction
- 🇧🇷 Brazil
- Tax
- VAT
- Change type
- E-invoicing
- Status
- In force
- Impact
- Action required
- Announced
- 30 July 2026
- Effective
- 3 August 2026
- Instrument
- BR-ATOCONJ-RFB-CGIBS-4-2026
- Authority
- Receita Federal do Brasil and Comitê Gestor do IBS (joint act)
- Systems
- Invoicing, ERP, Tax engine, POS, E-commerce
- Verified
- Fetched from official source · high confidence
Every issuer of Brazilian electronic fiscal documents (DF-e). Scope is staged by document type rather than by taxpayer size, with Simples Nacional taxpayers and Duimp imports starting 1 January 2027.
Confirm ERP and invoicing systems populate CBS and IBS fields on NF-e, NFC-e, CT-e, CT-e OS, MDF-e, GTV-e, NF3e, DC-e and NFS-e Via issued from 3 August 2026, and schedule the 1 October, 15 November and 1 December 2026 and 1 January 2027 phases — checking the Duimp and non-ICMS-taxpayer carve-outs against your own document mix.
InvoicingERPTax enginePOSE-commerce
Receita Federal and the Comitê Gestor do IBS jointly published Ato Conjunto RFB/CGIBS Nº 4, de 30 de julho de 2026, fixing the mandatory start dates, per document type, for issuing electronic fiscal documents (DF-e) carrying the CBS and IBS fields required by Article 112 of the IBS and CBS regulations. NF-e, NFC-e, CT-e, CT-e OS, MDF-e, GTV-e, NF3e, DC-e, NFS-e Via and non-classified BP-e are mandatory from 3 August 2026; NFCom, DIR and certain NFS-e events from 1 October 2026; the DeRE "Eventos Periódicos Mensais" from 15 November 2026 (art. 1, XVII, b); most remaining NFS-e services, air and metro BP-e, NFGas, NFAg and NF-e ABI from 1 December 2026; and Simples Nacional taxpayers, Duimp, monofásica-taxed NF-e and the remaining DeRE events from 1 January 2027. Two carve-outs sit outside that ladder: the import of tangible goods follows the Duimp date of 1 January 2027 rather than the general NF-e date (art. 1 §3), and an NF-e issued by an IBS/CBS taxpayer that is not an ICMS taxpayer, for goods movements or returns, becomes mandatory on 1 December 2026 (art. 1 §4).
What changed in detail
Receita Federal and the Comitê Gestor do IBS published Ato Conjunto RFB/CGIBS Nº 4 on 30 July 2026, setting the date from which each type of electronic fiscal document must carry the new CBS and IBS fields required by Article 112 of the IBS and CBS regulations.
NF-e, NFC-e, CT-e, CT-e OS, MDF-e, GTV-e, NF3e, DC-e, NFS-e Via and non-classified BP-e are mandatory from 3 August 2026. NFCom, DIR and certain NFS-e events follow on 1 October 2026; the DeRE “Eventos Periódicos Mensais” on 15 November 2026; most remaining NFS-e services, air and metro BP-e, NFGas, NFAg and NF-e ABI on 1 December 2026; and Simples Nacional taxpayers, Duimp and monofásica-taxed NF-e on 1 January 2027.
Two carve-outs sit outside that ladder: imports of tangible goods follow the Duimp date of 1 January 2027 rather than the general NF-e date, and an NF-e issued by an IBS/CBS taxpayer that is not an ICMS taxpayer, for goods movements or returns, starts on 1 December 2026.
What it means
This is the moment Brazil’s reform stops being a transition plan and becomes a filing calendar. The staging is by document type rather than by taxpayer size, which is unusual — a single business can be in scope for its NF-e today and out of scope for its NFS-e until December. Map the obligation per document, not per entity, and read the paragraph-level carve-outs: the act has at least three exceptions that a summary of the headline dates will miss.
Proof
Art. 1º A obrigatoriedade de emissão dos documentos fiscais eletrônicos de que trata o art. 112 dos regulamentos do IBS (RIBS) e da CBS (RCBS) iniciar-se-á em relação aos fatos geradores que vierem a ocorrer a partir das seguintes datas: I - Nota Fiscal Eletrônica - NF-e, modelo 55: 3 de agosto de 2026; II - Nota Fiscal de Consumidor Eletrônica - NFC-e, modelo 65: 3 de agosto de 2026;Art. 1. The obligation to issue the electronic fiscal documents referred to in art. 112 of the IBS (RIBS) and CBS (RCBS) regulations begins in relation to taxable events occurring from the following dates: I — Electronic Invoice (NF-e), model 55: 3 August 2026; II — Electronic Consumer Invoice (NFC-e), model 65: 3 August 2026.
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