Tax Planning
Simples Nacional Overhaul: What Small Businesses Must Know for 2027
With Simples Nacional set to integrate the new IBS and CBS taxes and eliminate the cash‐basis option, small businesses must plan ahead for sweeping changes effective January 1, 2027.
By NomadicTax Research Team • 5-8 min read • August 22, 2026
## What’s Changing in Simples Nacional
Brazil is transforming how Simples Nacional operates under the **Reforma Tributária do Consumo (RTC)**. Major changes slated for *1 January 2027* include:
- **Incorporation** of the IBS and CBS into the Simples Nacional regime—for taxation, compliance, and dispute resolution. ([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))
- **Elimination of the cash basis (“regime de caixa”)** for computing the monthly tax base: revenue must be recognized at invoice issuance (faturamento), not receipt. ([gov.br](https://www.gov.br/receitafederal/pt-br/assuntos/noticias/2026/agosto/regime-de-caixa-deixa-de-ser-utilizado-na-apuracao-do-simples-nacional?utm_source=openai))
- **New deadlines to opt in** for Simples Nacional (for those currently excluded) and for choosing whether to process IBS/CBS inside or outside the Simples regular regime. Opt-in period opens September 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))
## Sublimite and Revenue Recognition Impacts
- The **sublimit** of R$ 3.6 million for export sales is now recognized fully under Simples Nacional—no more R$ 1.8 million cap. ([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))
- For revenue recognition, any sale or service (including future delivery or additional billing) will count when invoiced. This affects businesses with deferred payments or installment plans. ([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))
## What Small Business Owners Should Do Now
- **Review invoicing practices and accounting systems**: ensure systems can issue fiscal documents at sale/service, even if payment comes later.
- **Plan for tax burden shifts**: recognizing revenue earlier can push taxable base higher faster—work with accounting to estimate cash-flow impacts.
- **Decide on regime**: If you're not currently part of Simples, evaluate whether Simples with the new IBS/CBS qualified regime benefits you more than paying IBS/CBS separately.
- **Mark key deadlines**: opt-in period runs from **1-30 September 2026** for Simples; for regular IBS/CBS regime, option periods depend on first or second half of 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))
## Example Comparison
| Scenario | Old Regime | Under RTC in 2027 |
|---|---|---|
| Small bookstore making R$3 million/year, selling goods on term until 90 days | Tax base by receipt, taxed later | Taxable base recognized at issue; higher apparent monthly base—potentially higher taxes earlier despite same annual revenue |
## Risks if Unprepared
- Invoices issued late or not aligning with operations could be non-compliant.
- Cash flow issues as taxes fall due on revenue not yet received.
- Possible penalties for late or incorrect option filings.
## Summary
The changes to Simples Nacional represent a **major operational and financial shift** for small businesses. Begin aligning systems and strategy now to avoid surprises in 2027.