Legal and tax experts are warning Brazilian small businesses about significant risks associated with the new Simples Nacional tax regime.
This transition is critical because the tax reform introduces a hybrid system and a split payment mechanism that could erode the competitiveness of small and micro-enterprises if they fail to plan correctly.
Elcio Honda, legal director of FIESP, Eduardo Fleury, founder of Fleury Advogados, and Wellington Mota, tax director of Confirp Contabilidade, analyzed the challenges in a recent discussion with Denise Campos de Toledo. The experts said the shift creates uncertainties regarding how taxes are collected and credited under the new rules.
Companies must decide whether to adopt the Simples Nacional for the 2027 cycle by September 2027 [1]. This deadline follows a shift in the original calendar, which was previously set for January. The change in the deadline was established by Resolution 8.86/2026 [2].
Further regulatory clarity came with the publication of Resolution CGSN No. 186 on April 17, 2026 [3]. This resolution outlines the deadlines and procedures for small businesses to opt into the regime. The CGSN, or the Simples Nacional Management Committee, is the primary body overseeing these transitions across the country.
The experts said that the "hybrid regime" creates specific traps for business owners. By mixing different tax methodologies, companies may find themselves paying more than anticipated or losing the ability to pass tax credits to their clients, a move that could make their services more expensive than those of larger competitors.
The split payment mechanism further complicates cash flow. This system automatically separates the tax portion of a transaction at the moment of payment, reducing the immediate liquid capital available to the business owner for operations.
“The shift creates uncertainties regarding how taxes are collected and credited under the new rules.”
The transition to a new tax framework in Brazil represents a pivot toward automated tax collection via split payments, reducing tax evasion but increasing the administrative burden on small firms. Because the decision deadline is set for September 2027, businesses have a window to perform comparative tax simulations to determine if the Simples Nacional remains the most cost-effective option or if the new hybrid risks outweigh the benefits of the simplified regime.
