Brazilian CBO Code Validator

CBO structure: reading the grande grupo from the first digit

Every CBO code is a hierarchy you can read left to right. The first digit is the grande grupo (major group), and the remaining digits narrow the occupation down through subgroups to a specific role. This tool reads 212405 and tells you it belongs to grande grupo 2 — Professionals of the sciences and arts, validating the structure rather than just the mask.

CBO 2002 follows the international ISCO design, so the same first-digit logic maps onto global occupation statistics. The ten major groups span from the armed forces to maintenance and repair work.

The ten grandes grupos (first digit)

• 0 Armed forces, police and military firefighters · 1 Public-sector leaders, directors and managers.
• 2 Professionals of the sciences and arts · 3 Mid-level technicians.
• 4 Administrative-service workers · 5 Service workers and commerce salespeople.
• 6 Agriculture, forestry and fishing · 7 & 8 Industrial production workers.
• 9 Maintenance and repair workers.

Full breakdown of 2-1-2-4-05

• G (grande grupo, 1 digit) → SG (principal subgroup, 1) → SGP (subgroup, 1) → F (família, 1) → OO (occupation, 2).
• So 212405 = group 2, narrowing to a specific IT/data occupation.
• No check digit: validity is structural plus the official MTE table.

Common pitfalls

• The first digit is meaningful: unlike a check digit, it carries the whole major-group classification — don't strip it.
• Hyphen optional: 2124-05 and 212405 are the same code.
• Groups 7 and 8 overlap by design: industrial production spans both major groups.
• Structure ≠ existence: a structurally plausible code still needs to exist in the CBO table.

FAQ

What does the first digit tell me? The grande grupo — the broadest of the ten occupational categories.

Is CBO 2002 international? It's the Brazilian adaptation of ISCO, so the major-group logic aligns with global standards.

Does reading the structure validate the code? It confirms the shape and major group; full validation still requires the MTE occupation table.