Compliance
Simples Nacional in Transition: Compliance Strategies Under Ley Complementar 214 for Small Businesses
Small businesses and microentrepreneurs must navigate shifting deadlines and options under Brazil’s tax reform. Understanding these changes is essential to ensure compliance and avoid exclusion or penalties.
By NomadicTax Research Team • 5-8 min read • August 10, 2026
## What’s New for Small Businesses and Simples Nacional
The **Simples Nacional regime**, which simplifies taxation for micro and small enterprises (ME, EPP, and MEI), has undergone procedural changes under **Lei Complementar nº 214/2025** and related regulations, including **Resolução CGSN nº 186/2026**. Key updates include the **transfer of the annual option window** from January to **September**, new elective choices for including CBS/IBS within the Simples, and tightened rules for reentry after exclusion.([normas.receita.fazenda.gov.br](https://normas.receita.fazenda.gov.br/sijut2consulta/consulta.action?lblTiposAtosSelecionados=Res.&orgaosSelecionados=CGSN&tipoData=2&tiposAtosSelecionados=67&utm_source=openai))
## Calendar and Decision Points
Here are the critical dates and decision-making points for businesses:
| Event | Old Deadline | New Deadline | Effectivity for Fiscal Year |
|-------|--------------|--------------|-----------------------------|
| Option to apply or exit Simples Nacional* | January | **September 1-30, 2026** | Applies from **Jan 1, 2027**([www8.receita.fazenda.gov.br](https://www8.receita.fazenda.gov.br/SIMPLESNACIONAL/noticias/noticiacompleta.aspx?id=C739E03C-8482-473F-8E82-F38EC3B13637&utm_source=openai)) |
| Choice between paying CBS/IBS “**inside**” Simples (guia única) vs “**outside**” via regime regular | made in January for Brazilian regimes | now alongside Simples opción window in September 2026, for first half 2027([www8.receita.fazenda.gov.br](https://www8.receita.fazenda.gov.br/SIMPLESNACIONAL/noticias/noticiacompleta.aspx?id=C739E03C-8482-473F-8E82-F38EC3B13637&utm_source=openai)) |
| Re-entry after exclusion due to debts | previously at certain times or criteria | now possible during September 2026, for effect Jan 1, 2027([gov.br](https://www.gov.br/receitafederal/pt-br/assuntos/noticias/2026/marco/receita-federal-emite-termo-de-exclusao-para-devedores-do-simples-nacional-incluindo-mei/perguntas-e-respostas-contribuinte-2026.pdf?utm_source=openai)) |
| MEI options | unchanged, still in January([www8.receita.fazenda.gov.br](https://www8.receita.fazenda.gov.br/simplesnacional/noticias/NoticiaCompleta.aspx?id=b47f0c13-23f9-43a6-a84d-1ab91e29cc66&utm_source=openai)) |
> * Excludes MEI where additional rules apply.
## Compliance Actions for Businesses
To stay compliant and optimize your tax position, consider these actions:
- **Decide early**: In September 2026, evaluate whether continuing in Simples Nacional with CBS/IBS inside the regime or moving to regime regular (outside Simples) gives financial advantage, considering cost, cash flow, and administrative burden.
- **Review current standing**: Any outstanding **débitos** may lead to exclusion from Simples Nacional. If you're notified, you’ll have **90 days** from knowledge to regularize debts, otherwise exclusion applies for Jan 1, 2027([gov.br](https://www.gov.br/receitafederal/pt-br/assuntos/noticias/2026/marco/receita-federal-emite-termo-de-exclusao-para-devedores-do-simples-nacional-incluindo-mei/perguntas-e-respostas-contribuinte-2026.pdf?utm_source=openai)).
- **Select invoicing tools**: The option of paying CBS/IBS outside Simples requires issuing documents and conforming to CBS/IBS-specific fiscal and digital document rules; ensure your software can issue compliant electronic documents with destaque CBS/IBS at correct leiautes.
- **Monitor Resolução CGSN nº 189/2026**: from **1 September 2026**, companies under Simples Nacional must issue NFS-e through the **Emissor Nacional**. This affects all ME/EPP in the regime([gov.br](https://www.gov.br/nfse/pt-br/noticias/nfs-e-e-simples-nacional-obrigatoriedade-de-emissao-atraves-do-emissor-nacional?utm_source=openai)).
## Example Scenario
Clara owns a small e-commerce company classified as EPP under Simples Nacional.
- In September 2026, Clara must choose between:
1. Continuar no Simples Nacional com recolhimento de CBS e IBS **na guia única**;
2. Optar por regime regular para CBS/IBS, emitindo documentos e recolhendo separadamente;
- She also needs to confirm that her emissão de NFS-e diária será feita pelo **Emissor Nacional** a partir de 1 September 2026;
- If Clara has outstanding fiscal debts, she must regularize them within 90 days after knowing the Termo de Exclusão, or risk exclusion starting 1 Jan 2027.
## Key Takeaways
- **September 2026** is now the pivotal month for most decisions under Simples Nacional regime relating to CBS/IBS and regime choices. Missing these windows could lock in unfavorable regimes for all of 2027.
- MEI entrepreneurs have different timing; no change for them in the January window.
- Use audit and advisory resources to simulate cost differences between regimes—tax on gross revenues vs separate CBS/IBS obligations may yield different net burdens.
Staying ahead of these deadlines and understanding your regime options will help small businesses remain compliant, avoid exclusion, and plan effectively under Brazil’s evolving tax landscape.