CIF Validator - Check if a Business Tax ID is valid
Use our online CIF validator to check if a Spanish Business Tax Identification Code is valid. Instant verification according to the Tax Agency regulations.
CIF Format
The correct format of a CIF consists of an initial letter (indicating the type of organization), followed by 7 numbers (2 province digits and 5 sequential digits) and a control digit or letter. The CIF is the tax identifier for companies and legal entities in Spain.
Validation Criteria
- Must start with a valid letter (A-H, J-N, P-S, U-W)
- The first two numbers must correspond to a valid province code (01-56)
- The control digit or letter must be correct according to the official algorithm
Validation Uses
- Verify the technical validity of a CIF
- Check business tax identifiers
- Development of business management applications
Important Notice: This validator only checks the technical validity of the CIF according to the official algorithm. It does not verify if the number is actually registered with the Tax Agency or belongs to a specific company.