// CBS · IBS · Selective Tax (IS)
Brazil's biggest tax overhaul in 40 years is here — five taxes become three, with a seven-year transition and over a thousand pages of regulation. TributAI gives accountants and companies an AI assistant that answers with the legal source always cited, runs the numbers through the official Receita Federal calculator and simulates tax regimes in one click. Built in Brazil, in Portuguese.
Brazil's Consumption Tax Reform (EC 132/2023, LC 214/2025, LC 227/2026 and the IBS/CBS regulations) replaces PIS, Cofins, ICMS, ISS and IPI with CBS, IBS and a Selective Tax. The transition spans seven years — and throughout it, accountants assess both the old system and the new one at once. Getting it wrong costs fines, assessments and clients.
Test phase: CBS 0.9% + IBS 0.1%, no effective charge. The year to get ready.
Full CBS (~8.8%). PIS and Cofins extinguished. The cost of not understanding the new system begins.
IBS enters a gradual transition. ICMS and ISS start to be phased down year by year.
New system at 100%. ICMS and ISS extinguished. Brazil's Dual VAT fully in force.
TributAI is not a ChatGPT wrapper. It's a vertical copilot with the official legislation indexed, the auditable Receita Federal calculator bolted on, and a workspace designed for people who serve dozens of companies at once.
Ask in plain Portuguese: "what happens to retail ICMS in 2029?". The AI answers with RAG over the full official legislation and cites the exact article. An answer without a citation is treated as a bug.
CBS, IBS and IS amounts are never "invented" by the AI. They come from the official Receita Federal RTC calculator, with a calculation trail and the legal basis applied — fully auditable.
Generate a plain-language PDF (and a WhatsApp version) explaining to your client what changes for their sector and regime. One-on-one meetings don't scale — a briefing does.
There are dozens of "tax GPTs" floating around the accounting market. What sets TributAI apart is what they lack: official legislation kept up to date, auditable calculations from Receita Federal itself, real multi-client support, and citation as a first-class citizen.
Retrieval over EC 132/2023, LC 214/2025, LC 227/2026 and the IBS/CBS regulations. Each answer brings the legal excerpt and a link to the full article — not a generic summary from training data.
DIFFERENTIATORCBS/IBS/IS calculations come from the official Receita Federal (Serpro) calculator. Zero calculation liability inside the product — the engine is the government's, with a calculation trail.
Compare Simples × Presumido × Real across the 7-year transition (2026–2033). See projected savings per year and the optimal-regime recommendation, with justification.
Ready-made templates ("what changes in 2026", "regime change recommendation") generate a PDF with your firm's branding plus a short WhatsApp version, in language the client actually understands.
A firm serves dozens of companies. Register clients with their CNPJ, regime, sector and state — and the copilot grounds every conversation in that specific client's data.
End clients ask basic questions straight on the firm's WhatsApp. For complex cases, the bot hands off to the accountant. Voice messages are transcribed automatically.
Receita Federal and the IBS Management Committee publish rulings almost weekly. A crawler monitors the official sources and alerts you — with an AI-generated summary — of what changed and who's affected.
Your clients' data (you are the controller, TributAI is the processor), an audit trail on every sensitive action, data export and right to erasure, and data anonymized before it reaches any LLM.
Models that perform strongly in PT-BR (Llama 3.3 70B for most queries, Sabiá-3 for critical legal ones). The technical language is Brazilian — no clumsy translation of tax terms.
"The IBS tax base is the transaction value, under the standard assessment regime § LC 214/2025 · Art. 12, and the credit is non-cumulative along the chain § EC 132/2023 · Art. 156-A. For your Simples client, there's a specific transition rule."
// every tax statement ships with its legal source — clickable, traceable, auditable.
Brazil has 529,000 accounting professionals and over 100,000 active firms — plus millions of companies that need to understand their own exposure. TributAI serves both sides.
Serving 30 to 150 clients, with no time to read a thousand pages of regulation per client. A multi-client workspace, an automatic communicator and a WhatsApp bot turn hours of meetings into minutes of conversation with the copilot.
Small and mid-sized companies that want to understand the reform's impact on their own business: which regime pays off, how much the tax shifts each year, what to do now in 2026 to avoid surprises in 2027.
Start free to try it, move to Solo once it becomes routine, pick a firm plan when you serve more clients. Companies deciding without an accountant get their own plan. Every plan has 20% off when billed annually.
To try it out
Solo accountant
5 seats, 150 clients
// there's also an Escritório+ plan (15 seats · 500 clients · R$ 899) and an Empresa plan for SMBs without an accountant (R$ 79). Initial pricing — subject to adjustment at launch.
TributAI is built by HPS Software with the same stack we use for our own products and for clients: end-to-end TypeScript, RAG over Postgres + pgvector, self-hosted embeddings, recurring PIX billing and LGPD non-optional. The code is already complete — all that's left is the production cutover at usetributai.com.br.
TributAI isn't open to the public yet — the product is code-complete and awaiting its production cutover at usetributai.com.br. Join the waitlist now to be first to know at launch and lock the initial pricing. No charge today, no card.
TributAI provides preliminary technical guidance based on cited official legislation and on calculations from the official Receita Federal calculator. It does not replace advice from a licensed accounting or legal professional.