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Alphanumeric CNPJ: what changes in your system and how to validate the digit

Desde 2026 a Receita Federal emite CNPJs alfanuméricos. As oito posições da raiz e as quatro da ordem podem conter letras e dígitos. Os dois dígitos verificadores continuam numéricos. Um CNPJ numérico virou um caso particular do formato novo. Os CNPJs que já existem não mudam de número e continuam válidos. Nenhuma base precisa de migração de dados. O trabalho é outro: aceitar letras onde o…

Translated from Portuguese Read in Portuguese

The Brazilian Federal Revenue will start issuing alphanumeric CNPJ (Cadastro Nacional da Pessoa Jurídica) numbers from 2026. The new format will have 8 positions for the root and 4 for the branch, which can contain letters and digits, while the two verifier digits will remain numeric. Existing CNPJ numbers will remain valid and no data migration is required, but systems that validate or store CNPJ numbers may need to be updated to accept letters. The API of cnpj.ia.br already supports both numeric and alphanumeric formats.

Written by urgent.news from Dev.to's report — not a translation of it. Machine-written — may contain errors; check the original before relying on it.

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