If the CRA can latch on to something, they will.
For most of us, the investment income we earn inside our TFSA’s are 100% tax free. However, if you are day trading inside your TFSA, the Canada Revenue Agency may come knocking.
You see, under the Income Tax Act, there is a subtle but highly important distinction between a business and an investor. This distinction is highly important because the TFSA exempts the investor’s income from tax but not a business.
Without boring you with the details suffice to say that a highly active investor placing many trades per day may be considered to be operating a business. The CRA could come knocking and indicate that the trades constitute running a business and apply both income tax as well as the penalty tax on the TFSA itself.
If you are making frequent trades in the TFSA or even your RRSP/RRIF, be cautious that the CRA may consider you to be running a business through your registered accounts.