Follow the instructions below to find your industry code.

1. Visit the website for the North American Industry Classification System (NAICS) (select this link).

2. Select the code that most closely represents the type of work that you do.

The webpage refreshes with a new list of codes.

3. Repeat step 2 until you reach a page with 6-digit codes.

4. Identify the code that most closely represents the work that you do and use that as your industry code.



Important notes about the industry code

  • If you have income from self-employment or if you own a small business, you need to enter a six-digit industry code in your tax return.
  • CRA’s NETFILE service will reject your tax return if you use an incorrect or outdated code.
  • Choose a code that best matches your main business activity.
  • Some sectors, subsectors, industry groups, and industry categories on the North American Industry Classification System (NAICS) website include an item that belongs with “Other.” If you can’t find a code that is directly relevant to your scenario in any of these categories, you can choose the code that corresponds to the “Other” item on the list.
  • Try to be consistent with the code you use each year unless your business changes drastically. A change in the first three digits of your code from year to year can result in a CRA inquiry.



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