The Federal Revenue announced that CNPJ will adopt an alphanumeric format (with letters and numbers) to expand registration capacity. The current format with 14 numeric digits is running out.
The new format is expected to take effect starting in 2026. The transition will be gradual — existing CNPJs will remain valid and functioning normally.
Already registered companies will keep their current CNPJs. Only new registrations will receive CNPJs in the alphanumeric format. Systems that validate CNPJ will need to be updated to accept letters.
Developers should update CNPJ validations to accept alphanumeric characters. cnpj-api.com will be updated to support the new format as soon as it takes effect.
No. Existing CNPJs remain unchanged.
It keeps 14 characters, but may contain letters from A to Z in addition to numbers.