Brazilian State Registration Validator

Check Brazilian IE format and check digits by state in your browser. See rule coverage without looking up registration status.

Check a Brazilian State Registration

The check runs in your browser. The IE is not saved, sent or included in the shared link.

Coverage: documented rules for all 27 Brazilian federal units (UFs), with older variants identified. Tocantins: only the 11-digit format; the 9-digit variant is not covered.

Brazilian state (UF)

State Registration (IE)

Keep leading zeroes. Spaces, dots, hyphens and slashes are accepted as separators; an initial P is only for São Paulo rural producers. Up to 64 characters.

Share the tool with the selected UF. The number is not included.

Result

Waiting for an IE

Choose a UF and type or paste the State Registration.

Local mathematical check, without an official lookup. This does not prove existence, active status, tax compliance or permission to issue invoices, and is not tax advice.

Official sources reviewed on September 18, 2026. This is the source review date, not the effective date of a new rule.

Sintegra — official registration lookups

Frequently asked questions

Does the result confirm an active company?

No. IE is a Brazilian state tax registration. This tool checks structure and check digits; existence, activity and compliance require a lookup in the state’s official register.

Can I enter ISENTO?

Yes. ISENTO, regardless of letter case, is shown as an exemption declaration. It is not validated as a number and does not prove that a company is entitled to claim exemption.

Why must I choose a UF?

Each state defines its own lengths, prefixes and calculations. The same sequence can have different results across UFs; we do not infer the state from the number.

Which variants are covered?

Documented rules for all 27 UFs, including BA with 8 (legacy) or 9 digits, PE with 9 or 14 (legacy), RN with 9 or 10, RO with 9 (legacy) or 14, and SP standard or rural starting with P. TO covers only 11 digits (legacy). Legacy labels do not establish current registration validity.

Why is a 9-digit TO registration not checked?

No sufficient official formula for this variant was found during the September 18, 2026 review. The tool reports an uncovered variant without calling the number invalid or converting it to 11 digits.

Is the number saved or shared?

No. Calculation is local and the link includes only the UF. Reloading clears the input. URL parameters containing IE and fragments are discarded; copying the number requires an explicit action.

About the Brazilian State Registration validator

Inscrição Estadual (IE) identifies a tax registration in a Brazilian state. This IE validator helps detect transcription errors using mathematical rules published by Sintegra and state tax departments. Coverage is limited to documented formats and does not replace an official registration lookup.

How to check an IE by state

Choose the UF, paste the complete number and read the result and coverage. Spaces, dots, hyphens and slashes are ignored; leading zeroes are preserved. Copy the normalized number if needed and follow the Sintegra link for official registration lookups. Do not change digits by trial and error to obtain a positive result.