Colombia Commercial RUT Validator
Online Colombia Commercial RUT validator. Verify format and check digits.
How is the Commercial RUT validated?
The RUT is the tax registration record managed by DIAN in Colombia. The commercial version requires the NIT taxpayer ID together with a valid 4-digit economic activity code (CIIU).
This tool generates and validates commercial RUTs, checking NIT Modulo 11 check digits and verify alignment with economic activity classification.
Anatomy & Structure of Commercial RUT
Commercial RUT references combine the entity NIT with its primary economic classification:
| Position | Field | Length | Meaning & Rule | Example |
|---|---|---|---|---|
| Part 1 | Entity NIT | 9 to 10 digits | Full tax identifier including DIAN check digit | 123.456.789-0 |
| Separator | Slash | 1 character | Slash separating tax identifier from business code | / |
| Part 2 | CIIU Code | 4 digits | Official economic classification code (DIAN/DANE) | 6201 |
Commercial RUT Validation Rules
Validation checks the mathematical authenticity of the NIT and verifies the CIIU code:
validateNit(NIT_Part) && CIIU_Part in CIIU_CODES
- 1. Split the string by the slash delimiter into tax NIT and CIIU code.
- 2. Validate the mathematical validity of the NIT via the DIAN Modulo 11 formula.
- 3. Verify that the 4-digit CIIU code belongs to the official DIAN/DANE catalog.