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Brazil tax reform in procurement

The reform changes the criteria for choosing suppliers.

Almost everything published about the reform is written for the tax team. This page is written for buyers: what changes in comparing proposals, in supplier master data and in cash, and what you can still do in 2026.

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Written from procurement's point of view, not the tax team'sInformational content, not tax advice
// what changes for buyers

Four changes that land on the buyer's desk.

Credit now depends on the tax being paid

Under the IBS and CBS model, the buyer's credit is tied to the tax actually paid on the transaction, and split payment is the mechanism that separates that tax at the moment of payment. In practice, the supplier's tax standing stops being a matter for the legal team alone and starts to affect the cost of the purchase.

Two suppliers with the same price no longer cost the same

If one itemizes IBS and CBS on the invoice and the other is a Simples Nacional supplier outside the regular regime, the cost after credit is different, even when the invoice and the price are the same. Comparing proposals now requires the cost net of credit, not the invoice amount.

There is a window, and it belongs to the supplier

CGSN Resolution 186/2026 opens, from September 1 to 30, 2026, the option for Simples Nacional companies to calculate IBS and CBS under the regular regime, effective January 1, 2027, with cancellation possible until the last day of November 2026. The decision is the supplier's; the conversation is the buyer's.

Cash enters the equation before the tax

Tax collection at settlement, refund timelines and the transition of legacy credits change when money goes out and comes back. Two sets of commercial terms that are equivalent on price can be very different in cash flow.

// what you can do now

Three steps that fit in 2026.

None of them depends on the final rate being settled. All three depend on seeing your own supplier base.

01

Map spend by supplier tax regime

Cross-reference ERP spend with the tax regime in the supplier master data. The result is a list ranked by value, not the five suppliers someone remembered.

02

Talk to the suppliers that concentrate spend

Prioritize the Simples Nacional suppliers that account for the most spend and start the conversation while the September window is open. The decision is theirs, and it has a deadline.

03

Change the yardstick for comparing proposals

Start comparing cost net of credit, not invoice price. It is a change in criteria, and it needs to be in the process before 2027, not after.

// frequently asked questions

Frequently asked questions

Questions from the people who buy, not the people who calculate the tax.

What does Brazil's tax reform change for procurement?

It changes the criteria for choosing suppliers. Under the IBS and CBS model, the buyer's credit follows the tax actually paid on the transaction, so two suppliers with the same price can have different net costs. Comparing proposals now requires the cost after credit, the tax regime in the supplier master data becomes a decision input, and cash changes with tax collection at settlement.

What is credit conditioned on payment?

It is the rule under which the purchaser's credit is tied to the tax actually paid on the transaction, not just to the document issued. Split payment is the mechanism that separates that amount at the moment of payment. It is the design that supports full non-cumulativity, and the practical effect for procurement is that the supplier's tax situation starts to influence the cost of the purchase.

What is the deadline for Simples Nacional companies to opt into the regular IBS and CBS regime?

CGSN Resolution 186/2026 set the window from September 1 to 30, 2026, effective January 1, 2027, with cancellation possible until the last day of November 2026. The decision belongs to the supplier company. The buyer does not opt on its behalf, but is the one who feels the difference in credit and the one who can tell the supplier in time.

Where should a procurement team start preparing?

With three steps that do not depend on the final rate: cross-reference ERP spend with the tax regime in the supplier master data to know how much is with Simples Nacional suppliers, talk to the ones that concentrate spend while the window is open, and switch the yardstick for comparing proposals from invoice price to cost net of credit before 2027.

Does UpFlux provide tax advice?

No. UpFlux reads the procurement events in the ERP and returns a picture of spend, including by supplier tax regime, so the procurement team knows whom to talk to and where the difference is material. The tax decision belongs to the company, together with its tax team and its advisor.

Do you know how much of your spend is with Simples Nacional suppliers?

The answer lies in cross-referencing ERP spend with the tax regime in the supplier master data. It is the same kind of analysis we run to find tail spend, and it fits in two weeks.

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