Tax Planning
How Brazil’s Reforma Tributária is Reshaping Simples Nacional: Practical Tips for Small Businesses
The introduction of IBS and CBS into Simples Nacional brings sweeping changes—understand your new options, deadlines, and how to stay compliant by 2027.
By NomadicTax Research Team • 5-8 min read • August 27, 2026
## Overview of Key Changes under Reforma Tributária do Consumo
The Reforma Tributária do Consumo (Consumption Tax Reform) is integrating two new taxes into Brazil's tax landscape:
- **Imposto sobre Bens e Serviços (IBS)**
- **Contribuição sobre Bens e Serviços (CBS)**
These taxes are being folded into the **Simples Nacional** regime, replacing PIS and Cofins and significantly altering how small and micro enterprises operate. ([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 Rules and Deadlines for Small Businesses
| What | Deadline | Action Required |
|------|----------|-----------------|
| Option to join Simples Nacional regime | 1–30 September 2026 | Non-optantes must apply if intending to enter Simples in Jan 2027; existing optantes must consider hybrid or external IBS/CBS regime ([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)) |
| Option to recolher (collect) IBS/CBS outside Simples (regime regular) for 1st semester 2027 | 1–30 September 2026 | Decide whether to operate under the hybrid model or pay taxes by the new regime ([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)) |
| Option for 2nd semester of 2027 for those who didn’t opt earlier | 1–31 March 2027 | Applies if didn't make option in Sept 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)) |
## Impacts on Revenue Recognition, Base Calculation & MEI
- Revenue includes **bens materiais e imateriais, direitos, serviços**, along with gorjetas, juros, multas, etc. ([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))
- Revenue must be recognized upon fiscal document issuance, even for future deliveries, document changes, or complements. The “caixa” regime (cash basis) option is now eliminated. ([gov.br](https://www.gov.br/receitafederal/pt-br/acesso-a-informacao/acoes-e-programas/programas-e-atividades/reforma-tributaria-do-consumo/noticias?utm_source=openai))
- **MEI** (Microempreendedor Individual) now has expanded obligations to issue specific fiscal documents for merchandise and certain services; NFS-e, Nota Fiscal Fácil, etc. ([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))
- The **sublimit of R$ 3.6 million** will apply to revenue thresholds for Simples Nacional concerning IBS, ICMS, and ISS. Export-related sublimite settings also updated. ([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))
## Practical Action Steps
1. **Classify your current status**: Are you MEI, opting for Simples, or outside Simples? Identify which set of rules will apply to you.
2. **Decide on regime for IBS/CBS**:
- Stay fully under Simples Nacional (with IBS/CBS included), or
- Hybrid: Simples Nacional but pay CBS/IBS under regime regular—file separately. Deadline: Sept 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))
3. **Update systems & accounting practices**:
- Ensure fiscal document layout is aligned with new document-fiscal-eletrônico (e.g., NF-e, NFC-e, etc.).
- Revenue recognition upon issuance.
4. **Seek guidance & training**: Use resources from Receita Federal, CGSN, and professional accountants—especially if in agribusiness or cooperativism sectors, which have particular modules in upcoming training. ([gov.br](https://www.gov.br/receitafederal/pt-br/assuntos/noticias/2026/agosto/receita-federal-destaca-agronegocio-e-cooperativismo-agricola-em-novo-modulo-do-curso-reforma-tributaria-do-consumo?utm_source=openai))
5. **Monitor compliance deadlines**: missing the choice windows in September or March will lock you into defaults.
## Real-World Example
Maria runs a small artisan bakery in São Paulo. Under the old Simples regime, she paid a unified tax. Now with IBS/CBS:
- She will decide by 30 September 2026 **how** to pay CBS/IBS (inside Simples or outside via regime regular).
- She must ensure her yeast ingredient supply bills, service fees (like bakery classes), even fines or late-payment fees are properly documented.
- She will need to issue relevant e-invoices (Not Fiscais) per category (e.g. NF-e for goods, NFS-e for services).
## Summary
- The **Simples Nacional** regime is changing substantially from Jan 2027 onward, integrating CBS/IBS.
- Deadlines for opting in are tight: **Sep 2026** for many changes; **Mar 2027** for second-semester options.
- Stay informed, update internal systems, and obtain professional advice to avoid missteps.
By moving proactively, micro and small businesses can ease the transition and use the reforms to their advantage rather than face compliance penalties later.