What Is a State Tax Registration Number
A State Tax Registration Number, known in Brazil as Inscrição Estadual (IE), is a mandatory identification code assigned by each state’s tax authority (SEFAZ) to companies and, in some cases, individual entrepreneurs who engage in the circulation of goods or inter-state transportation. This number is directly linked to the collection of ICMS (Imposto sobre Circulação de Mercadorias e Serviços), one of the most important state-level taxes. Without a valid IE, a business cannot issue invoices for goods sold across state lines or claim tax credits. The IE is stored in the state’s official taxpayer registry and is used to track a company’s tax obligations, filings, and compliance status. For anyone involved in commerce, knowing how to check this registration is essential to avoid legal penalties and ensure smooth business operations.
Why You Need to Check the IE Status
Verifying the status of an Inscrição Estadual is a routine but crucial task for accountants, suppliers, and logistics professionals. A simple check can reveal whether a registration is active, suspended, canceled, or inactive. An active IE means the company can legally operate and issue fiscal documents. A suspended or canceled IE may indicate outstanding debts, missing filings, or administrative irregularities. If you issue an invoice to a company with an invalid IE, you risk tax liability and fines. Moreover, fraudsters often use fake or outdated registrations to impersonate legitimate businesses. By consulting the IE before every transaction, you protect your company from fraud and ensure compliance with tax laws. Regular checks also help maintain up-to-date customer records and avoid disruptions in supply chains.
Free Methods to Consult IE
Fortunately, the Brazilian tax system provides several free, official ways to consult an Inscrição Estadual. The most widely used method is the SINTEGRA National Portal, a cooperative platform managed by CONFAZ that integrates databases from all 27 state tax authorities. Other methods include direct visits to state-specific SEFAZ websites and, for high-volume verifications, automated API services. Below is a step-by-step list for using the SINTEGRA portal:
- Open a web browser and go to the official SINTEGRA website at http://www.sintegra.gov.br/.
- On the homepage, locate the dropdown menu labeled State. Select the state where the company is registered.
- Enter either the company’s CNPJ (Brazilian business identifier), the IE number itself, or the CPF (individual taxpayer number) if the entity is an individual entrepreneur.
- Complete the CAPTCHA security verification to prove you are not a robot.
- Click the Consultar button. The system will display the current status of the registration along with the company name, address, and activity information.
This free method works for occasional consultations. However, the SINTEGRA portal may experience downtime or slower responses during peak hours. For urgent checks, each state also offers its own direct consultation page.
How to Use the SINTEGRA National Portal in Detail
The SINTEGRA portal is the most consolidated tool for checking IE status across all Brazilian states. When you access the site, you will see a simple interface designed for quick queries. The first step is to select the correct state. This is critical because IE numbers are not unique nationwide; the same number can exist in different states. After choosing the state, you must enter at least one identifier. If you know the IE, that is the most direct input. If not, the CNPJ will work for most companies. For individuals who are optional ICMS taxpayers, the CPF is required. Once you fill in the data and pass the CAPTCHA, the system queries the respective state’s SEFAZ database and returns the result within seconds.
The result shows the registration status, which can be one of several categories: ativa (active), suspensa (suspended), cancelada (canceled), or inapta (inactive). Active means the taxpayer is in good standing. Suspended indicates a temporary block, often due to missing declarations or unpaid taxes. Canceled means the registration has been permanently revoked. Inactive is used for registrations that are no longer in use but were not formally canceled. The response also displays the company’s full legal name, address, and main economic activity code (CNAE). It is important to note that SINTEGRA does not provide detailed debt information or historical filings. For that, you would need to access the state’s own portal or use a paid service.
State-Specific Portals for IE Consultation
Each state’s tax authority maintains its own online portal where you can consult IE directly. These portals often provide more detailed information than the national SINTEGRA system. For example, in São Paulo the portal is called CADESP (Cadastro de Contribuintes do ICMS). In Rio Grande do Sul, the system is called CCC (Cadastro Centralizado de Contribuinte). In Minas Gerais, the portal is known as SICAD. Using these state-specific sites may give you access to additional data such as the taxpayer’s compliance history, date of registration, and any pending obligations. The following table lists a few major states and their respective IE consultation portals:
| State | Portal Name | Official URL |
|---|---|---|
| São Paulo | CADESP | https://www.cadesp.fazenda.sp.gov.br/ |
| Rio Grande do Sul | CCC | https://www.sefaz.rs.gov.br/CCC |
| Minas Gerais | SICAD | https://www.fazenda.mg.gov.br/empresas/sicad/ |
| Rio de Janeiro | Dec. ICMS | https://www.fazenda.rj.gov.br/sefaz/ |
To use a state portal, you typically need to input the company’s CNPJ or IE. Some states also offer a simplified query without requiring login. However, direct portals may have stricter CAPTCHA requirements or request additional data like the company’s tax regime. Always verify the official URL to avoid phishing sites. For a comprehensive list of all state portals, you can refer to the FiscalAPI guide at this page.
When Manual Consultation Is Not Enough
While free portals are sufficient for occasional queries, they become impractical for businesses that need to check dozens or hundreds of IE numbers daily. Manual typing into web forms, solving CAPTCHAs, and copying results is time-consuming and prone to human error. For companies validating more than 50 registrations per day, the only viable solution is an automated API integrated directly with the state SEFAZ databases. APIs allow real-time, machine-to-machine consultation without manual intervention. They return structured data (JSON or XML) that can be imported into your ERP, CRM, or accounting software. This automation eliminates delays and reduces operational costs. Moreover, APIs can handle bulk requests simultaneously, providing batch verification in seconds.
How API Integration Simplifies Bulk Checks
Several technology providers offer API services for IE consultation. These APIs connect to each state’s official database and return the exact same information you would get from a manual query. The user sends a request containing the CNPJ or IE and the state abbreviation, and the API responds with the registration status, company name, address, and other details. Because the API uses official government data sources, the result is legally valid for compliance purposes. Integration is straightforward: developers need only to handle HTTP requests and parse JSON responses. Many providers offer free tiers for low-volume use and paid plans for higher volumes. For companies operating across multiple states, an API that covers all 27 states is essential. This approach also supports continuous monitoring: you can schedule regular checks to ensure that your suppliers’ IE statuses have not changed. The initial investment in API integration quickly pays for itself by preventing tax liabilities and fraud.
References
FiscalAPI. Como Consultar Inscrição Estadual em 2026. Disponível em: https://fiscalapi.com.br/blog/como-consultar-inscricao-estadual/. Acesso em 2025.
SINTEGRA – Sistema Integrado de Informações sobre Operações Interestaduais com Mercadorias e Serviços. Disponível em: http://www.sintegra.gov.br/. Acesso em 2025.
Contabilizei. Inscrição Estadual: O que é? Como consultar pelo CNPJ? Disponível em: https://www.contabilizei.com.br/contabilidade-online/inscricao-estadual/. Acesso em 2025.
SPC Brasil. Como consultar a Inscrição Estadual do seu CNPJ. Disponível em: https://www.spcbrasil.com.br/blog/como-consultar-a-inscricao-estadual/. Acesso em 2025.
