Brazil is in the middle of replacing one of the most complicated tax systems in the world, and the next ten weeks are when this change stops being theoretical for most businesses. The idea of folding Brazil's tangle of federal, state and municipal consumption taxes into a centralised VAT has been around for years — a first version surfaced back in 2020, when the government proposed swapping the old PIS/Cofins contributions for a single federal levy.

That early bill never went anywhere on its own, but the underlying logic survived: Constitutional Amendment 132, passed in 2023, set the real reform in motion, and Complementary Law 214/2025, enacted in January 2025, became its operating manual.

The result is a dual VAT structure. A federal contribution called CBS absorbs PIS, Cofins and, in effect, IPI. A new IBS, split between states and municipalities, absorbs ICMS and ISS — the two notoriously fragmented subnational taxes that have made compliance a challenge for any company operating across Brazil's 26 states and 5,000-plus municipalities. A third charge, the Selective Tax, applies on top to goods considered harmful, such as sugary drinks, alcohol and tobacco. A separate companion law, regulating how disputes get resolved and who governs the new system, cleared the Senate's Constitution and Justice Committee in September 2025 and was adopted in early January 2026, formally establishing the IBS Management Committee (CGIBS) as the body that will administer the tax day to day.

So the legislative skeleton is essentially finished. What's happened since has been the much harder work of translating that law into invoicing systems, registration databases and enforcement mechanics — and that's the part still very much in motion.

Testing Stage

2026 has been deliberately designed as a test year. Since January, companies have had to start showing CBS and IBS on their electronic invoices at purely symbolic rates — roughly 0.9% and 0.1% — but no payment is actually due. The point is to force the entire invoicing chain (issuers, software vendors, the tax authority's systems) to prove it works before real money is on the line. A penalty grace period covered the first four months of the year for businesses that got the new invoice fields wrong; that grace period expired on 30 April, so even within the test year, accuracy now matters.

Real tax collection starts with CBS in 2027. IBS phases in gradually after that, with the old taxes — PIS, Cofins, IPI, ICMS, ISS — fully retired only by 2033. So Brazil is giving itself roughly seven years of overlap between old and new systems, which is generous on paper but means many companies will be running two tax logics in parallel for years.

The near-term calendar

Two dates dominate everything happening right now:

1 July 2026 — Brazil starts issuing the new alphanumeric CNPJ (the national business ID number), because the country is running out of purely numeric combinations. New registrations from this date carry letters as well as digits, and every system that touches an invoice — ERPs, tax engines, government web services, the 44-character invoice access key, even the barcode standard on printed receipts — has to be able to read and validate the new format. Testing for this was originally meant to finish by 1 June, got pushed to 15 June, but the 1 July production deadline never moved, which has left a noticeably tight runway for end-to-end testing.

1 August 2026 — This is the harder deadline. From this date, CBS and IBS fields stop being optional or informational and become mandatory across essentially every type of electronic fiscal document Brazil uses — standard invoices, consumer receipts, service invoices, transport documents, air tickets, the works. Invoices that don't comply get rejected outright at the point of issuance; Brazil's system validates in real time rather than catching problems later in an audit, so no changes are expected after the fact. Penalties for non-compliance, which had been suspended through the test year's first months, are live from this date. A new simplified consumer receipt format and a fully embedded tax-classification system within the invoice XML also go live alongside it.

Foreign digital suppliers are now squarely in scope

Brazil has stopped relying on Brazilian customers to account for tax on cross-border digital purchases and is moving to direct registration of the foreign supplier instead. A decree issued at the end of April 2026 spells out the mechanics — SaaS providers, streaming services, cloud platforms, app stores, online marketplaces and e-learning businesses selling into Brazil now face CBS and IBS registration, invoicing and remittance obligations with no minimum revenue threshold. The first taxable sale triggers the obligation.

Digital platforms carry a second layer of exposure on top of their own sales: where a platform controls pricing, payment or the customer relationship, it can become the party legally responsible for collecting and remitting tax on transactions it merely facilitates for third-party sellers — a "deemed supplier" model that closely mirrors what the EU, UK and Australia have already built for digital services (the EU has been heading the same direction with platform VAT rules since at least 2022). Brazil is also building a split-payment mechanism, where tax is carved out of a transaction automatically at the moment of payment rather than self-remitted by the seller — though it's worth being precise here: the technical groundwork for that is being laid into the invoicing system now, but regulators have explicitly confirmed split payment will not actually operate in 2026. The rules governing how it works financially are still being written.

What's been resolved, and what's still open

The tax authority moved in early June to confirm that roughly BRL 140 billion in accumulated PIS/Cofins credits — held by around 100,000 companies — will survive the transition rather than being wiped out, giving businesses three ways to use them (offset against CBS, cash refund, or offset against other federal taxes). That said, the authority has also flagged about BRL 44 billion in credit positions across some 12,000 companies that look inconsistent and will be contacted directly to clean up their filings before 2027.

The operational and financial rules for split payment, several special sectoral regimes, and a public consultation on parts of the implementing regulation were running through the end of May. More technical notes are expected as Brazil has already published several rounds of e-invoicing schema updates this year alone, and officials have been candid that guidance will keep evolving as real-world testing surfaces problems.

The practical takeaway

For any business with Brazilian exposure — whether through local operations, cross-border sales, or a platform that touches Brazilian customers — the sequence to plan around is: alphanumeric CNPJ readiness by 1 July, full CBS/IBS invoice-field compliance by 1 August, and a clear read on registration and platform-liability exposure before CBS becomes a real, payable tax in 2027. None of this is collecting real money yet. But the test year is the only chance to find the bugs before the deadlines that matter actually arrive.