Canada BN Generator
Online generator for Canada Revenue Agency (CRA) Business Number (BN9) and Program Accounts (BN15).
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About the Canadian Business Number (BN)
The Business Number (BN) is a unique 9-digit identifier assigned by the Canada Revenue Agency (CRA) / Agence du revenu du Canada (ARC) to identify Canadian businesses for federal and provincial tax purposes.
The BN root comprises 9 numerical digits validated by the Luhn algorithm (Modulo 10). For specific taxation programs, the CRA attaches a 2-letter program identifier (such as RC for Corporate Income Tax, RT for GST/HST, or RP for Payroll) plus a 4-digit reference number, creating the 15-character BN15 identifier.
Check Digit Calculation Algorithm (Luhn / Mod 10)
The check digit of the BN9 root is verified using the standard Luhn algorithm with alternating weights of 1 and 2:
Sum = Σ dᵢ × (if i even: 2, if i odd: 1) [with two-digit reduction]; Checksum = (10 - (Sum mod 10)) mod 10
- Extract the first 8 digits of the Canadian business number root.
- Multiply the digits alternately by 1 and 2 from left to right (weights 1, 2, 1, 2, 1, 2, 1, 2).
- If any product is 10 or greater, sum the individual digits of that product (e.g. 7 × 2 = 14 → 1 + 4 = 5).
- Sum all resulting values together.
- The check digit is the amount required to round the sum up to the nearest multiple of 10.