Not everyone loses with the Reform: find out which sectors do not depend on tax credits and keep Simples as the most profitable choice.
By Priscila Campos
The biggest trap for Brazilian business owners in the coming years will not be the final Dual VAT rate. It will be inertia.
For almost two decades, Simples Nacional functioned as an unquestionable safe harbor. The equation was elementary: if your revenue was within the limit, you opted for the regime, reduced bureaucracy, and paid less tax. This logic paved the way for thousands of companies across the country, but the Tax Reform is about to definitively end the era of automatic choices.
Simples Nacional will not end. The preferential treatment is preserved in the Constitution, and the single payment slip will continue to exist. What is ending is the premise that being under Simples necessarily means paying less tax, having lower operating costs, or being more competitive.
As of 2027, tax classification will cease to be merely a matter of complying with a tax table and will become part of your company’s pricing strategy, EBITDA margin, and market positioning.
The Silent Asymmetry in B2B Relationships
The most critical turning point of the new system lies in the credit dynamics of the Value Added Tax (CBS and IBS).
In corporate transactions (Business-to-Business), the professional buyer does not evaluate the nominal price on the invoice; they calculate the net cost of the transaction after offsetting tax credits in their cash flow.
This is where remaining passively under Simples becomes a silent risk of losing market share:
- When purchasing from a supplier subject to the regular regime, the purchasing company receives the full tax credit (estimated at around 27%).
- When purchasing from a company that keeps IBS and CBS unified within the Simples payment slip (DAS), the credit passed on is restricted to the fraction effectively collected under that regime, a substantially lower amount.
Imagine two suppliers competing for the same R$ 1 million corporate contract. The first delivers R$ 270,000 in tax credits to the client; the second delivers a minimal fraction. To equalize the buyer’s effective cost, the company under Simples will be forced to grant direct commercial discounts, bleeding its own profit margin — or will be summarily disqualified from procurement processes.
A company may continue paying an apparently reduced rate on its monthly payment slip and, even so, see its B2B client portfolio evaporate. Not because of operational inefficiency or loss of product quality, but because the tax credit it delivers to the market is no longer competitive.
Where the Simples Rationale Still Holds
If the unified regime becomes a minefield in B2B, in the Direct-to-Consumer (B2C) environment the logic is reversed.
For organizations with operations focused directly on the final consumer, such as local retailers, B2C e-commerce businesses, food service chains, gyms, medical clinics, and personal service providers — the traditional Simples model tends to remain broadly advantageous.
Individual consumers do not claim tax credits. They make purchasing decisions based on shelf price, value proposition, and experience. If the business operation has low dependence on inputs taxed at the source and healthy margins, maintaining unified assessment through DAS preserves operational efficiency and protects profitability without exposing the company to commercial risks.
September 2026: The Strategic Arbitrage Window
The legislation established that the choice regarding the IBS and CBS collection model for the first half of 2027 must be formalized before the Brazilian Federal Revenue Service between September 1 and 30, 2026.
Failure to act during this period will mean the automatic maintenance of IBS/CBS within DAS. In practical terms: anyone who does not run the simulation using real data by the third quarter of 2026 will be making a multimillion-dollar decision in the dark.
The questions senior leadership needs to answer before September are not found in the tax code, but in the income statement and client map:
- What is the actual composition of the company’s revenue? What percentage comes from B2B clients subject to the regular regime versus final consumers?
- How sensitive is the client portfolio to tax credits? Will current corporate clients demand price compensation if the credit passed on is reduced?
- How deep is the input chain? Does the company’s volume of taxed purchases justify migrating to the debit-and-credit regime?
- Is there room in the margin? Can current pricing withstand aggressive discount negotiations without compromising the financial health of the business?
The Era of Active Tax Management
The biggest mistake a decision-maker can make at this moment is to treat the Tax Reform as a matter restricted to accounting.
Paying taxes under the regular regime may increase the nominal rate or the complexity of tax control, but it may be the only decision capable of protecting the company’s most valuable contracts. Saving R$ 20,000 on the month’s tax payment slip does not compensate for the cancellation of a R$ 5 million annual contract.
The Tax Reform does not eliminate Simples Nacional. It eliminates the comfort zone of passive management.
As of 2027, the best tax option will not be the one that generates the lowest payment slip at the end of the month. It will be the one that protects margins, ensures client retention, guarantees the competitiveness of the offering, and preserves the organization’s market value.
Priscila Campos is a businesswoman, accountant, and specialist in business structuring, governance, and business internationalization.
