A unique nine-digit federal identifier assigned by the Canada Revenue Agency.
In practice
Program accounts extend the base with a two-letter code and four-digit reference. A request for BN9 asks for the base, not the full program account.
What to check next
Use the number-versus-corporation-number guide before searching. The BN is different from Québec’s ten-digit NEQ.
Sources and review
Source checked October 30, 2026. Examples illustrate the process; they do not describe a real corporation.
Canada.ca — Business number reference standard