CBS of 11.3% in 2027: the impact on retail goes beyond the rate

Tax credits, price formation, margins, suppliers, and systems will be at the center of companies' adaptation to the new tax reality.

The Consumption Tax Reform has just gained an important number for 2027.

The Federal Court of Accounts (TCU) approved the calculation of the reference rate for the Contribution on Goods and Services (CBS) at approximately 11.3%. The CBS will replace PIS and Cofins starting in 2027 and will be the federal portion of the new Brazilian consumption tax model.

The percentage draws attention, especially when compared to the rates currently applicable to PIS and Cofins. However, for retail, looking only at this comparison can lead to misleading conclusions.

The most important question is not simply how much the new rate will be.

It is to understand how much of the taxation will be effectively absorbed by the company, recovered through credits, or reflected in prices — and whether the systems will be prepared to perform these calculations correctly in each operation.

This is where the true impact of the Tax Reform begins.

11.3% is a reference rate

The calculation presented by the TCU arrived at a reference rate close to 11.3% for the CBS in 2027.

The percentage was calculated within the logic of maintaining revenue during the replacement of PIS and Cofins by the new tax.

However, this does not mean that all companies will have a direct and proportional increase in their tax burden.

The CBS will operate within the logic of a VAT — Value Added Tax — with broader non-cumulativity, allowing, within the rules established by legislation, the appropriation of credits related to the acquisitions made by the company.

Therefore, the economic effect will depend much more on the structure of each operation than on the simple reading of the nominal rate.

Comparing 11.3% with 9.25% does not tell the whole story

A first reading could suggest that companies currently subject to the combined rates of PIS and Cofins of 9.25% would simply move to a taxation of 11.3%.

In practice, the comparison is more complex.

The two models have different structures for generating and utilizing credits.

A company with a large volume of acquisitions that allow for credit utilization may offset a significant portion of the CBS levied on its sales.

Another company, even with similar revenue, may have a cost structure that generates proportionally fewer credits.

The result is simple:

the rate may be the same, but the effective tax burden can be quite different.

For retail, this places tax credit at the center of the economic decisions of the operation.

Purchases and suppliers will increasingly influence the margin

Acquisition price, availability, delivery time, and commercial conditions are already part of buyers' negotiation routines.

With the new tax model, another component gains even more relevance: the fiscal impact of the acquisition and its ability to generate credits.

This means that the economic analysis of a purchase now requires a more integrated view of factors such as:

• supplier commercial conditions;
• applicable taxation to the operation;
• potentially recoverable credits;
• product classification;
• specific or differentiated regimes;
• net cost of goods;
• projected margin;
• final price to the consumer.

In operations with thousands or millions of SKUs, this analysis cannot depend on manual processes or parallel spreadsheets.

It needs to be incorporated into the systems that support commercial decisions.

Pricing and margin enter the center of the discussion

In retail, small percentage variations can produce significant impacts when applied to large transactional volumes.

Therefore, the Tax Reform should not be analyzed solely from the perspective of collecting the new taxes.

It also needs to be incorporated into pricing and margin management decisions.

Companies will need to answer questions such as:

• What will be the net margin of each category in the new model?
• How much of the tax change can be absorbed by the operation?
• How much will need to be reflected in the final price?
• Which products will have greater or lesser capacity to generate credits?
• Will existing promotions remain economically sustainable?
• Will commercial contracts need to be renegotiated?
• How to compare suppliers considering the total economic cost of the operation?

These answers cannot arise only during the fiscal or accounting closing.

They need to be available at the moment buyers negotiate, commercial teams plan promotions, and systems calculate prices.

The challenge is also within the systems

The Tax Reform crosses practically the entire technological architecture of a large retailer.

The impact begins with product and supplier registration and can extend through purchasing, receiving, inventory, costs, pricing, sales, billing, finance, tax, and accounting.

Moreover, the transition period requires companies to coexist with new rules while certain current taxes and processes continue to exist.

In practice, this significantly increases the complexity of integrations and business rules.

Registration and data quality

Tax classifications, product attributes, suppliers, and tax parameters need to be consistent.

A registration error at the source can propagate throughout the chain and affect tax calculations, credits, costs, and margins.

Purchases

The new rules need to be considered in the receipt of goods, costs, document reconciliation, and economic evaluation of suppliers.

Pricing

Pricing engines need to correctly consider the new tax structure to avoid margin loss or inappropriate pass-through to the consumer.

Promotions

Discounts, campaigns, bonuses, and commercial incentives also need to be analyzed under the new tax logic.

Tax and finance

Calculation of debts and credits, tax documents, reconciliations, and accounting will depend on consistent integrations between different corporate systems.

Integrations

In a large retail operation, dozens of applications can participate in a single transactional journey.

Therefore, changing a tax rule rarely means changing just one system.

From taxation to results

In retail, the impact of the Tax Reform traverses the entire decision chain — from purchase to result.

DiagramaClique para ampliar

This relationship shows why treating the Tax Reform exclusively as an initiative of the tax area may be insufficient.

The impact reaches directly to the commercial and operational decisions of the company.

2027 should not mark the beginning of preparation

The transition to the new tax model has already begun.

In 2026, CBS and IBS entered the testing period outlined in the Tax Reform schedule. Starting in 2027, PIS and Cofins will cease to exist, and CBS will effectively become part of the companies' operations.

For large organizations, this means that the current period needs to be used to simulate scenarios, review processes, and test systems.

Some analyses gain importance:

1. simulation of CBS on sales and purchases;
2. estimation of credit generation by category and supplier;
3. impact analysis on margin by product or product group;
4. identification of potentially affected contracts;
5. review of pricing and promotion rules;
6. mapping of impacted integrations;
7. review of master registrations;
8. end-to-end testing of the main business journeys.

The larger the operation and the volume of transactions, the greater the risk of discovering inconsistencies only after the new rules go live.

Much more than a fiscal change

The reference of 11.3% transforms the discussion about CBS into something more concrete.

But the percentage, in isolation, does not explain the impact that the Tax Reform will have on each company.

For retail, the most relevant transformation lies in how taxation, credits, suppliers, purchases, pricing, margin, and technology become even more interconnected.

The challenge will not only be to correctly calculate a new tax.

It will be to ensure that its effects are incorporated into the commercial decisions and operational processes of the company.

In high-scale operations, a tax rule implemented incorrectly quickly ceases to be just a fiscal problem and becomes a problem of margin, operation, and result.