Receita Federal Ends Simples Nacional Cash-Basis Option for 2027 Tax Filings

On the evening of August 14, 2026, Brazil’s Receita Federal reported that the Comitê Gestor do Simples Nacional (CGSN) had approved updated rules for Simples Nacional, the country’s simplified tax regime for micro and small enterprises. Among the changes, the agency confirmed the abolition of the cash-basis option (regime de caixa) for monthly tax calculation — effective January 1, 2027.

Under the new framework, businesses in the regime must recognize revenue when operations are billed, typically tied to the issuance of the fiscal document, rather than when payment is actually received. The shift is part of a broader package aligning Simples Nacional with Brazil’s Consumption Tax Reform (Reforma Tributária do Consumo), which introduces the IBS (goods and services tax) and CBS (contribution on goods and services).

Editor’s note: This article draws on Receita Federal announcements of August 14, 2026, CGSN Resolutions 190–193, and technical summaries from Brazilian accounting and tax publications covering the same period.

What changed on August 14?

The Receita Federal published two related notices on August 14:

1. A summary of CGSN resolutions adapting Simples Nacional to the consumption tax reform.
2. A dedicated notice on the end of the cash regime for monthly Simples Nacional assessments.

The CGSN approved the changes through Resolução CGSN nº 190 (dated August 4, 2026, published August 10) and companion resolutions 191, 192, and 193. Resolution 190 broadly updates Resolução CGSN nº 140/2018, which has governed the regime’s operational rules.

Element	Detail
Effective date	January 1, 2027 (general rule under Resolution 190)
Cash-basis option	Abolished for monthly DAS calculation
New revenue rule	Gross monthly revenue recognized at billing of the operation
Legal basis	Complementary Laws 214/2025 and 227/2026; amended art. 18, § 3º of LC 123/2006
Revoked provisions	Cash-regime articles under Resolution 140/2018, including rules on amounts receivable

How the cash regime worked — and what disappears

Simples Nacional allows qualifying microenterprises (ME) and small enterprises (EPP) to pay federal, state, and municipal taxes through a single monthly document, the DAS (Documento de Arrecadação do Simples Nacional).

Until now, eligible businesses could opt annually to calculate that monthly base on cash received rather than revenue earned. That helped firms with installment sales, delayed customer payments, or seasonal cash-flow gaps: tax was due when money arrived, not when an invoice was issued.

From January 1, 2027, that option will no longer exist. The monthly tax base will correspond to total gross monthly revenue earned, under new revenue-recognition rules. For sales of goods, rights, or services, revenue is considered earned at the moment of billing, generally linked to issuance of the formal fiscal document.

For credit sales, the timing of tax incidence will no longer follow cash inflow. A business that invoices in one month but collects weeks later may owe Simples Nacional on the billed amount before payment arrives.

Through December 31, 2026, businesses that have validly elected the cash regime may continue using it for the remainder of the year.

Why the Receita Federal is making the shift

Official materials frame the change as alignment with the consumption tax reform, not an isolated accounting tweak.

The reform replaces several existing levies with IBS and CBS. Resolution 190 incorporates those taxes into Simples Nacional rules for collection, enforcement, and administrative disputes, while adjusting for the phase-out of PIS and Cofins.

Revenue recognition at billing matches the accrual-based logic (regime de competência) embedded in the new tax architecture. The Receita Federal had flagged the end of the cash regime in July 2026 technical presentations ahead of the CGSN vote, and the August resolutions formalized what officials had already signaled to accountants and software vendors.

The reform does not abolish Simples Nacional itself. The differentiated regime remains, but its tax composition and calculation mechanics are being redesigned for 2027 and beyond.

Other 2027 rules businesses should track

The August package goes beyond cash accounting. Key deadlines and options include:

Entry and opt-out windows for 2027

Who	Action	Window
Non-optants seeking Simples Nacional from Jan. 2027	Submit application	Sept. 1–30, 2026 (cancellation allowed until Nov. 30)
Current optants wanting regular IBS/CBS collection in H1 2027	Opt out of unified DAS for those taxes	Sept. 1–30, 2026
Optants choosing regular IBS/CBS for H2 2027	Second-semester election	Mar. 1–31, 2027 (cancellation until May 31)

The Receita Federal notes that CGSN may extend cancellation deadlines depending on when the new CBS reference rate is published.

Additional technical changes

• National NFS-e standard for MEs and EPPs: mandatory use postponed to November 1, 2026 (Resolution 191).
• Export sublimit: the additional R$ 3.6 million export ceiling remains; the former R$ 1.8 million sublimit reference is removed.
• PGDAS-A (assisted calculation system): phased rollout continues; businesses should verify system updates before filing.

Who is affected?

The change primarily touches:

• MEs and EPPs under Simples Nacional that currently use or might consider the cash-basis option.
• MEIs (Microempreendedores Individuais) indirectly, as broader Simples rules and reform timelines evolve.
• Accountants and tax software providers, who must adjust workflows, receivables tracking, and DAS projections for 2027.

Businesses with heavy installment billing, long payment terms, or large year-end invoicing may face the steepest working-capital pressure: taxes could fall due before customers pay.

What owners and accountants should do now

The Receita Federal urges micro and small businesses, MEIs, and accounting professionals to monitor official updates and begin preparing for 2027 rules.

Practical steps cited in Brazilian tax commentary include:

1. Review 2026 cash-regime elections — confirm whether the current option remains valid through year-end.
2. Map receivables — identify billed-but-unpaid amounts that could trigger tax before cash collection from January 2027.
3. Stress-test cash flow — model DAS under billing-based recognition for typical sales cycles.
4. Update contracts and pricing — some firms may need shorter payment terms or adjusted margins to absorb earlier tax timing.
5. Watch September 2026 windows — firms planning to enter Simples Nacional or opt for regular IBS/CBS collection must meet published deadlines.
6. Align invoicing systems — ensure fiscal documents, NFS-e, and ERP modules support the new recognition rules.

Official guidance and resolution texts are published on the Receita Federal and CGSN portals; given the volume of technical detail, most businesses will rely on qualified accountants for implementation.

Reaction from the business community

Coverage on August 15, 2026 — the morning after the Receita Federal notice — showed accountants and small-business associations parsing the resolutions line by line. Trade press emphasized that the cash-regime repeal is legally grounded in complementary legislation passed in 2025–2026, reducing expectations of a last-minute reversal.

The dominant concern in early commentary is liquidity: firms accustomed to matching tax outflows with cash inflows must rethink treasury planning. Software vendors and accounting educators have pointed to the July 2026 Receita Federal training modules as the clearest prior signal that cash-basis accounting would not survive the reform rollout.

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Discussion

Brazil’s smallest incorporated businesses built Simples Nacional around a single monthly payment — and for many, around the choice of when that payment is calculated.

1. If you run or advise a small business with installment sales, how would billing-based DAS in 2027 change your cash-flow planning?

Would you shorten payment terms, build tax reserves at invoicing, or restructure product mix?

2. Is accrual-based recognition a fair trade for simpler alignment with the new IBS and CBS framework — or does it ask too much of businesses with thin margins and slow-paying clients?

Share how you weigh tax simplicity against working-capital risk.

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This article is news and general information, not tax or legal advice. Consult a qualified Brazilian tax professional before making filing elections or changing your company’s tax regime.