Compliance
How Brazilian Businesses Must Comply with CBS/IBS and Simples Nacional Adaptations
Firms, especially those under Simples Nacional, face sweeping compliance shifts including hybrid collections, national NFS-e use and reporting changes under CBS/IBS.
By NomadicTax Research Team • 5-8 min read • September 7, 2026
## What Business Owners Need to Know ##
### Simples Nacional and CBS/IBS Integration
Simples Nacional (ME/EPP) companies will see CBS and IBS incorporated into their regime starting **January 1, 2027** ([gov.br](https://www.gov.br/fazenda/pt-br/assuntos/noticias/2026/agosto/cgsn-atualiza-regras-do-simples-nacional-para-adequacao-a-reforma-tributaria-do-consumo?utm_source=openai)). Before then, between November 1, 2026 and December 31, 2026:
- Emission of the **Nota Fiscal de Serviços Eletrônica nacional (NFS-e nacional)** becomes mandatory for ME/EPP from **November 1** ([gov.br](https://www.gov.br/receitafederal/pt-br/assuntos/noticias/2026/agosto/simples-nacional-nfs-e-nacional-sera-obrigatoria-para-me-e-epp-a-partir-de-1o-de-novembro-de-2026/?utm_source=openai)).
- Option to collect CBS/IBS **outside Simples**, in “regular regime,” known informally as a **hybrid option**, valid for first half of 2027; companies that prefer this need to apply between **September 1-30, 2026** ([gov.br](https://www.gov.br/fazenda/pt-br/assuntos/noticias/2026/agosto/cgsn-atualiza-regras-do-simples-nacional-para-adequacao-a-reforma-tributaria-do-consumo?utm_source=openai)).
### New Obligations and Documents
- Under **Ato Conjunto RFB/CGIBS nº 4/2026**, various documents (NF-e, NFC-e, CT-e, etc.) will have required issuance dates according to sector; many start from **October to December 2026**, others from **January 2027** for Simples Nacional members ([gov.br](https://www.gov.br/fazenda/pt-br/assuntos/noticias/2026/julho/receita-federal-e-comite-gestor-do-ibs-publicam-o-cronograma-de-implementacao-dos-documentos-fiscais-eletronicos-da-reforma-tributaria-do-consumo?utm_source=openai)).
- CBS and IBS must be **highlighted (stated specifically)** in documents where applicable—not just included by default in Simples National’s aggregated billing ([gov.br](https://www.gov.br/receitafederal/pt-br/acesso-a-informacao/acoes-e-programas/programas-e-atividades/reforma-tributaria-do-consumo/legislacao/legislacao-da-reforma-tributaria-do-consumo?utm_source=openai)).
## Compliance Timeline and Actions
| Timeframe | What Firms Must Do |
|-----------|--------------------|
| Now (before Sep 2026) | Decide if opting into Simples or hybrid model; update accounting systems to issue national NFS-e; issue option during **1-30 September 2026** for 2027 effect ([gov.br](https://www.gov.br/fazenda/pt-br/assuntos/noticias/2026/agosto/cgsn-atualiza-regras-do-simples-nacional-para-adequacao-a-reforma-tributaria-do-consumo?utm_source=openai)). |
| By Oct-Nov 2026 | Begin emission of required documents (NFS-e nacional from Nov 1 for ME/EPP); start using correct leiautes and include CBS/IBS highlights where necessary for businesses not using Simples or hybrid. |
| From Jan 1, 2027 | Full implementation: CBS & IBS integrated; all Simples Nacional companies observe the new system; individuals and firms properly registered and issuing fiscal documents under new rules; tolerance for missing CBS/IBS fields ends. |
## Example Comparison: Simples Nacional vs Hybrid
A small café, Café Sol, currently under Simples Nacional:
- If it stays fully under Simples: taxes included in DAS, but from Jan 2027 it must comply with CBS/IBS integrated rules and highlight those on invoices.
- If it opts for hybrid: between Sep-Nov 2026, it can choose to collect CBS/IBS outside DAS, likely useful if its tax burden is high. It still remains eligible for Simples’ reduced obligations, but bears additional compliance. Needs analysis with CAJOR or contador.
## Tips for Smooth Compliance
- **Engage your software provider** early to ensure NFS-e national and fiscal document systems support CBS/IBS-highlighted fields.
- **Train staff and finance team** about the hybrid option and deadlines (especially in September 2026).
- **Monitor communications** from Receita Federal and CGIBS; technical notes and leiautes may update.
- **Document internal controls** now: processes for emission, record-keeping, and audit trail will be scrutinized.
## Conclusion
Brazilian businesses must adapt quickly. Key dates (November 2026, January 2027) require careful planning. The rollout provides transition periods, but fully complying by Jan 1, 2027 is essential to avoid noncompliance risk.