Brazil postpones the national NFS-e mandate for Simples Nacional micro and small businesses to 1 November 2026

What changed in detail

Resolução CGSN nº 191, de 4 de agosto de 2026 makes issuing the national-standard Nota Fiscal de Serviços eletrônica (NFS-e) mandatory for microenterprises (ME) and small businesses (EPP) opting for Simples Nacional, with effect from 1 November 2026. It amends Resolução CGSN nº 140, de 2018, and requires the document to be issued through the Emissor Nacional da NFS-e, either through the web application or through API integration.

The resolution expressly revoked Resolução CGSN nº 189, de 2026, which had set the same obligation for 1 September 2026. The obligation is therefore two months later than the date previously in force.

Publishing the change on 14 August 2026, Receita Federal also set out how the resolution operates alongside Ato Conjunto RFB/CGIBS nº 4/2026. Until 31 December 2026, Simples Nacional businesses stay under the simplified regime’s own rules and only the NFS-e issuing duty applies. From 1 January 2027, when CBS and IBS enter the regime, the Ato Conjunto’s provisions for CBS and IBS taxpayers begin to take effect, including showing those taxes on the fiscal document where applicable. Receita Federal describes the two instruments as complementary, addressing different moments rather than overlapping.

What it means

Two months of relief, and no change of destination. The date that moved is the one for the document channel, not the one for the tax content — and keeping those apart is the useful part of this notice. November 2026 is when a Simples service provider has to be issuing through the Emissor Nacional; January 2027 is when CBS and IBS start appearing on what it issues.

The work is the integration, not the rate. A business already issuing through a municipal NFS-e system has to move to the national issuer, so the two months are worth spending on the API or on confirming the web application covers the volume. Anyone who read the September date as final and stopped work should restart it now rather than in October.