The factors, weighed the way the CRA weighs them
Nothing in the Income Tax Act says a day trader pays business rates; the case law does. The CRA and the courts read the whole pattern of activity, and four threads carry most of the weight:
- Frequency and volume: hundreds of round trips a year reads differently than a dozen rebalances.
- Holding period: positions measured in minutes and days point to trading; months and years point to investing.
- Knowledge and time: formal market training, scanners running all session, trading as your main occupation, all of it pushes toward business.
- Financing: margin and short-term leverage signal a quick-turnover intention that patient capital does not.
No single thread decides, and your stated intention matters less than what the fill history shows. The same test also runs inside registered accounts, which is why heavy TFSA trading has its own CRA review program, a planning problem we treat separately from the filing itself.
What each answer changes on the T1
Capital treatment puts dispositions on Schedule 3: half the net gain enters income, and capital losses offset capital gains only, back three years or forward indefinitely. Business treatment moves the activity to Form T2125: the full profit is income, but the full loss deducts against salary, rental or any other income, and the costs of running the operation, data subscriptions, platform fees, a home office, become expenses instead of personal spending.
Two second-order effects surprise people. Business-income trading is earned income, so a profitable year builds RRSP contribution room that a capital gain never creates. And the character is a position, not a preference: filing as an investor in the years you win and a business in the years you lose is exactly the pattern reviewers are trained to find. We set the treatment on the evidence, record why, and keep it consistent until the facts genuinely change.
Subsection 39(4): the election that ends the argument, for some
The Act offers one route to certainty. File Form T123 with your return and every Canadian security you dispose of, that year and in every later year, is deemed capital property. The election is irrevocable, a one-way door worth walking through deliberately, usually in a year when the capital answer is clearly worth locking in for good.
Its reach is narrower than the name suggests, and the bar in subsection 39(5) is real: a trader or dealer in securities cannot elect, and courts have read that phrase to include anyone whose activity itself amounts to a trading business. The election protects the active investor in the contested middle ground; it does not rescue the person the factors have already decided against.
Timing matters as much as eligibility. The T123 goes in with the return for the year you want it to start; it is not a form to discover in the middle of a review, and because it binds every later year too, it deserves a projection of what your book will look like after the current run, not just during it.
| Position | Under a filed T123 election |
|---|---|
| Shares of corporations resident in Canada | Capital treatment locked in, this year and onward |
| Mutual fund trust units, Canadian bonds and debentures | Covered by the election |
| US-listed and other foreign shares | Outside it; character decided on the facts |
| Options, futures and short sales | Outside it; each judged on its own pattern |
| A trader or dealer in securities | Barred from electing at all |
How the return actually gets filed
Most trader files are T1s prepared through Personal Tax Filing: Schedule 3 or T2125 built from a reconciled disposition ledger, the T123 decision assessed, and a memo in the file recording why the character position was taken, dated the year we took it. Where the book lives inside a company, Corporate Tax Filing carries the same analysis onto the T2, where the stakes shift again because investment income earns no small business deduction.
One quiet advantage traders hold over almost every other business we file for: buying and selling securities is an exempt financial activity for GST/HST, so there is no registration, no collection and no HST return, whichever way the character lands. When a review letter arrives anyway, and trader returns attract them, CRA Audit & Review Support answers it from the working papers behind the filing. We prepare returns for traders across Mississauga and the GTA, with every fee quoted in writing after a free 15-minute discovery call.
