How Accounting Firms Should Prepare for the Tax Reform
A practical action plan for accounting firms to help their clients through the transition to the IBS/CBS tax reform.
Executive Summary
Brazil’s Tax Reform (LC 214/2025) is the biggest challenge accounting professionals have faced in decades. It is not merely a change in rates — it is a complete transformation of the Brazilian tax system, with new tax codes (NBS), a new ancillary obligation (EFD-IBS), a new invoice (NFS-e Nacional), a new credit-taking system, and a transition period that runs through 2032. For accounting firms, this represents an opportunity to be the trusted guide their clients need — but it demands a concrete action plan. This guide offers a four-phase preparation roadmap, with specific actions for each quarter of 2026 and 2027.
Why This Reform Is Different
The scale of the change
It is no exaggeration to say that the Tax Reform is comparable in complexity to the creation of SPED in 2007 — but with one crucial difference: SPED was an incremental change, while the reform is a systemic one.
The dimensions of the change:
- 5 taxes replaced: ICMS, ISS, IPI, PIS, and COFINS give way to IBS and CBS
- 4,500+ municipalities affected: each with its own current ISS framework
- 10 years of transition: from 2022 to 2032, with rules that change every year
- Mandatory NBS code: every service will require classification
- NFS-e Nacional: a nationally unified service invoice
- EFD-IBS: a new tax bookkeeping system that will replace EFD-ICMS and EFD-Contribuições
The opportunity for firms
Firms that position themselves now as reference advisors on the Tax Reform will:
- Retain clients: companies that fail to understand the reform will need specialized help
- Win new clients: demand for information will grow
- Create new services: diagnostics, training, transition plans
- Add value: the complexity justifies higher fees
Firms that fail to prepare risk losing clients to better-prepared competitors.
Action Plan: 4 Preparation Phases
Phase 1: Self-Assessment (Q1–Q2 2026)
The first step is to make sure your own firm is ready before serving clients.
Actions:
Build an internal tax-reform team
- Appoint 2–3 professionals to become the firm’s “internal specialists” on the reform
- Give them dedicated time to study LC 214/2025 and complementary legislation
- Priority: these professionals will be the firm’s competitive differentiator
Map the impact on your own firm
- What are your current systems (ERP, tax software)?
- Which systems will need to be updated?
- How much will the update cost?
- Which of your ancillary obligations will change?
Test NFS-e Nacional in the sandbox environment
- The Receita Federal will release a test environment in 2026
- The earlier you test, the more time you’ll have to fix problems
Identify your top 20 clients by impact
- Clients with the highest revenue are the most affected
- Clients with the greatest operational complexity (multiple municipalities, exports) need priority attention
Create an impact-diagnostic template
- Develop a checklist of questions to apply to each client
- Example: “In how many municipalities does your client issue invoices?”
- Example: “Does your client export services?”
Phase 2: Adapting Systems and Processes (Q3–Q4 2026)
With the self-assessment done, it’s time to prepare the infrastructure.
Actions:
Update the firm’s ERP
- Request an update from your ERP vendor to support NFS-e Nacional and EFD-IBS
- Test invoice issuance with the NBS code
- Verify that the system reconciles IBS/CBS credits
Update the tax software
- The tax software must process EFD-IBS
- Check whether the vendor has an update roadmap
- Consider switching vendors if the current one has no update plan
Create transition-document templates
- An impact-report template for clients
- An adaptation-checklist template
- A personalized transition-schedule template
Train the entire team
- It’s not enough to train only the internal specialists — the whole accounting team needs to understand the basics
- Suggested minimum training: 8 hours per professional
- Include case studies and exercises with NBS codes
Establish a legislative-monitoring routine
- Track publications from the Receita Federal and the Ministry of Finance
- Assign a professional responsible for filtering relevant information
- Create an internal channel (Slack, Teams, email) to share updates
Phase 3: Communicating with Clients (Q1–Q2 2027)
With the firm ready, it’s time to communicate with clients.
Actions:
Create educational content
- A newsletter about the Tax Reform (sent monthly by email)
- Posts on the firm’s website explaining each aspect of the reform
- A monthly explanatory webinar (it can be recorded and republished)
Schedule diagnostic meetings with all clients
- One-hour meetings with each relevant client
- Present the personalized impact diagnostic
- Propose a specific adaptation plan
Draft transition-service proposals
- Diagnose the tax impact: fees from R$ 3,000 to R$ 10,000 (depending on company size)
- Systems-adaptation plan: fees from R$ 5,000 to R$ 20,000
- Transition follow-up (retainer): R$ 1,500 to R$ 5,000/month
Build transition-service packages
- Essential Package (for SMEs): diagnostic + action plan + 3 months of follow-up
- Complete Package (for medium/large companies): diagnostic + implementation + follow-up through 2028
- Premium Package (for large companies): diagnostic + implementation + team training + continuous monitoring
Keep an eye on competitors
- Large firms and the Big Four are investing heavily in content about the reform
- Your competitive advantage is closeness to the client and competitive pricing
Phase 4: Execution and Monitoring (Q3 2027 onward)
Actions:
Execute clients’ adaptation plans
- Help each client update systems, classify NBS codes, and adapt contracts
- Monitor NFS-e Nacional issuance in the production environment
Monitor the client’s transition
- Track monthly compliance with ancillary obligations under the new system
- Adjust transition plans as the legislation is clarified
Keep yourself continuously up to date
- The legislation will keep changing — stay current
- Attend events, courses, and publications about the reform
Assess the need for new services
- The complexity of the reform will create demand for services that didn’t exist before
- Examples: post-reform pricing consulting, diagnostics of remaining credits, contract reviews
The Impact-Diagnostic Model
To apply to each client, use this checklist:
Block 1: Client Profile
- Annual revenue
- Sector of operation (primary NBS)
- Number of employees
- States/municipalities where it operates
- Service exports? (Yes/No)
Block 2: Current Obligations
- Does it issue NFS-e? In which municipalities?
- Does it file EFD-ICMS? EFD-Contribuições?
- Does it file DCTF? DEFIS?
- Does it file ECF? ECD?
- Does it have any other special obligation?
Block 3: Contracts
- Does it have long-term contracts (over 1 year)?
- Fixed-price contracts?
- Contracts with the public sector?
- Contracts with strategic suppliers?
Block 4: Estimated Impact
- Current estimated tax burden (% of revenue)
- Estimated post-reform tax burden (% of revenue)
- Projected difference
- Projected IBS/CBS credits
- Cash-flow impact
Block 5: Systems
- Current ERP? Version?
- Current tax software?
- Needs updating? When?
- Has an internal IT team?
CTA: VMAHUB as the Accountant’s Partner
VMAHUB is a reference in tax compliance and stands alongside accounting professionals throughout this transition. We offer:
- Complete Guide to the Tax Reform (published in /en/napratica)
- Simulation Spreadsheets to calculate the impact per client
- A Diagnostic Model in editable format
- Legislative Updates in real time
Want to access these materials and understand how VMAHUB can help you and your clients? On /en/napratica VMAHUB publishes practical guides for companies. For a personalized analysis of your case, talk to our team: [email protected]
Read also:
- Tax Planning 2025-2027
- Commercial Contracts and the Tax Reform
- Ancillary Obligations under the Tax Reform
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