Business number

Use your federal business number to interact with the CRA and other government programs. Find out how to get one, register for CRA program accounts, and manage changes to your business.

Most requested

• My Business Account
• Represent a Client

Services and information

When you need a business number or Canada Revenue Agency program accounts

Certain business activities require registration with the CRA.

How to register for a business number or CRA program accounts

Register for a business number or CRA program accounts by mail, phone, fax, or online.

Changes to your business and tax accounts

For common business changes, make updates online, inform the CRA, and other actions.

Authorize a representative or cancel their authorization

Grant or cancel authorization to a representative, the types of access you can give, and the ways to authorize.

CRA registration and provincial or other federal programs

Your business number registration can be connected to other federal or provincial programs.

Contributors