Brazil’s 2027 CBS: TCU approves 11.3%, Senate decision pending

Brazil’s CBS for 2027 does not yet have a rate definitively set by the Federal Senate. On October 28, 2026, the Federal Court of Accounts (TCU) unanimously approved an exact calculation of 11.3468%. Under the rounding rule reported in coverage of the session, that becomes an official reference of 11.3%. Because Brazil’s Federal Revenue Service says the 2027 rate will receive a transitional reduction of 0.1 percentage point, the available information points to an 11.2% general rate — and does not support presenting 11.2468% as a confirmed figure.

That number remains subject to the legislative stage. The Senate is responsible for formally setting the reference. Accordingly, 11.2% is a reading that combines the TCU-approved reference with the reduction published by the Revenue Service, not a final enacted rate. Nor does it mean that every price will automatically rise by 11.2%.

What the TCU approved

The report on the October 28 session states that the TCU unanimously approved the reference-rate calculation. The mathematical result was 11.3468%, but the same source says Complementary Law 214/2025 requires rounding to one decimal place, producing 11.3% as the official reference.

The Court’s approval has therefore already taken place. It would be inaccurate to describe future TCU validation as a pending step. What remains outstanding is action by the Federal Senate, which is responsible for formally setting the applicable rate under the reform procedure.

Agência Brasil reported that the Senate must set the rate by December 15, 2026. According to coverage of the TCU session, if the Senate does not act by the deadline, the Court’s calculations will apply provisionally. Until the decision or that provisional rule takes effect, businesses should not present the reference as a definitive rate.

Why the indicated calculation is 11.2%, not 11.2468%

Brazil’s Federal Revenue Service states that the CBS rate in 2027 and 2028 will be reduced by 0.1 percentage point. Starting from the rounded official reference of 11.3%, the calculation is:

• approved and rounded reference: 11.3%;
• transitional reduction: 0.1 percentage point;
• indicated 2027 general rate: 11.2%.

The reviewed sources do not establish that the reduction must be applied to all four decimal places in the technical calculation before rounding. They therefore provide insufficient support for describing 11.2468% as the possible general charge. A difference of 0.0468 percentage point may appear small, but it matters for contracts, tax systems and customer communications.

A percentage point must also be distinguished from a relative percentage. Subtracting 0.1 point from 11.3% produces 11.2%; it does not mean reducing 11.3% by only 0.1% of its own value.

How the calculation was built

The reference is not a price estimate for a particular product. According to the TCU’s technical explanation, the methodology uses actual collection data from mandatory tax filings and company accounting records. It also incorporates economic information from IBGE, Brazil’s statistics agency, and fuel-production data from the National Petroleum Agency.

The TCU’s institutional portal explains that Constitutional Amendment 132/2023 and Complementary Law 214/2025 gave the Court responsibilities related to calculating and certifying CBS and IBS reference rates. The purpose is to support the tax-system transition and preserve revenue parameters, not to anticipate the price change for every good or service.

In 2027, the CBS will take effect and replace PIS and Cofins. The Revenue Service also says the IPI rate will fall to zero for most products, subject to an exception involving goods manufactured in the Manaus Free Trade Zone. Those changes must be assessed together.

Why 11.2% is not an identical price increase

The CBS follows a non-cumulative value-added tax model. In general, tax paid at earlier stages may generate credits that can be offset at later stages. The nominal rate on a transaction therefore does not necessarily equal the business’s net burden.

The price effect will depend on the credit chain, the transaction’s tax treatment, replacement of current taxes and each company’s commercial decisions. Agência Brasil also reports that the methodology accounts for a broader taxpayer base and different special regimes.

Adding 11.2% to the current price of every product or service is therefore not a valid way to predict its 2027 price. A proper comparison requires knowing which taxes will disappear, which credits can be claimed and which rule governs the specific transaction. Differentiated treatments also mean that a single rate cannot describe every case.

What consumers and businesses should monitor

For consumers, the practical conclusion is straightforward: 11.3468%, 11.3% and 11.2% do not represent a uniform price increase. The first figure is the technical result before rounding; the second is the official reference approved by the TCU; the third follows from applying the transitional reduction to that reference but still depends on the Senate stage.

Businesses and self-employed professionals involved in Brazilian transactions should keep these concepts separate in forecasts, contracts and billing systems. They must also assess available credits and the applicable regime instead of treating the nominal rate as the net cost.

Because the Senate’s decision may still change the situation, readers should check the TCU’s official updates before finalizing calculations or communicating rates to customers. This concerns Brazilian taxation and does not imply application in the United States, Canada or the United Kingdom.

In brief

The TCU has approved the calculation: 11.3468%, rounded to an official reference of 11.3%. The Revenue Service’s transitional reduction points to an 11.2% general rate in 2027. The Senate’s formal decision remains pending; if it does not act within the reported deadline, the Court’s calculation is expected to apply provisionally. None of these figures, in isolation, shows how much any particular price will change.