He turned $15,000 into $617,000. Then the CRA sent the bill.
Your TFSA is tax-free, unless the CRA decides you're running a business inside it. Then every dollar of profit can be taxed at the top rate, years after you've spent it.
That's what happened to Fareed Ahamed, a Vancouver investment adviser. He contributed $5,000 a year from 2009 to 2011, traded speculative junior mining stocks, and grew the account to $617,371 by the end of 2011. The CRA reassessed about $569,000 of it as taxable business income, and two courts agreed.
This isn't a reason to panic about your index funds. But if you use Wealthsimple, Questrade or any self-directed TFSA to trade often, you need to know where the line is. Here's what the law says, how the CRA decides, what's genuinely unfair about the rules, and what you can do.
What the law actually says
There is no rule limiting how many trades you make in a TFSA. The catch is one clause in subsection 146.2(6) of the Income Tax Act: a TFSA pays no tax, except on income from any business it carries on in that year.
If the CRA decides your trading is a business, three things follow:
- Profits are taxed in full. Inside the TFSA trust, gains from that business are fully taxable, not the 50% inclusion you'd get on ordinary capital gains outside the account.
- The rate is the top rate. The TFSA is a trust, and trusts pay tax at the highest marginal rate, usually more than you'd pay personally.
- You're on the hook personally. Subsection 146.2(6.1) makes you jointly and severally liable with the trust for tax years from 2019 onward. Your bank or broker's liability is capped at what's still in the account. Emptying the TFSA doesn't make the bill go away.
There's one more sting. If you withdraw income that's already been taxed, that withdrawal doesn't give you back contribution room the way a normal withdrawal would.
Buying "allowed" investments doesn't protect you. Ahamed only held qualified investments, mostly TSX Venture stocks. The problem wasn't what he bought. It was how he traded.
How the CRA decides you're "running a business"
There is no magic number of trades. The CRA weighs your whole pattern of behaviour, using factors from court decisions and a 1984 bulletin (IT-479R) it still points people to. No single factor decides it.
| Looks like investing | Looks like a business |
|---|---|
| A handful of trades a year | Trades every day or week |
| Holding for months or years | Selling within days |
| Established, dividend-paying companies or broad ETFs | Speculative penny stocks that pay nothing |
| Buying to hold and grow | Buying purely to flip for a profit |
| Checking your account occasionally | Hours a day researching and trading |
| Unrelated day job | Working in finance or with specialized market knowledge |
Your job matters more than most people realize. The same trading pattern can look very different coming from an investment adviser than from a nurse or a teacher.
Account size matters too, at least as a trigger. Tax lawyers have long reported that big TFSA balances, far beyond what contributions alone could explain, are what tend to draw CRA attention in the first place.
The case that settled it
Ahamed opened his self-directed TFSA on January 2, 2009, the first week TFSAs existed. He maxed out contributions for three years and then stopped. Here's how the account grew, and what the CRA taxed:
| Year | Total contributed | Value at year end | Income reassessed |
|---|---|---|---|
| 2009 | $5,000 | $54,270 | $44,270 |
| 2010 | $10,000 | $420,965 | $180,190 |
| 2011 | $15,000 | $617,371 | $330,994 |
| 2012 | $15,000 | $564,483 | $14,027 |
In January 2013 he sold everything and withdrew about $548,000. The CRA then reassessed all four years.
His side never argued the trading wasn't business-like. Their argument was legal: RRSPs have an explicit exemption for trading qualified investments, so TFSAs should too. The courts said no.
- February 2023: The Tax Court of Canada dismissed the appeal (2023 TCC 17). Parliament wrote an exception for RRSPs and chose not to write one for TFSAs.
- December 2023: The court ordered about $96,000 in enhanced legal costs against the trust.
- June 2024: The Federal Court of Appeal dismissed the appeal from the bench (2024 FCA 108), calling the argument untenable.
The case began in 2015 and ended in 2024. That's nine years of litigation.
How often does this happen?
Less than the headlines suggest, but it's real. According to The Globe and Mail, the CRA assessed about $114 million in taxes from TFSA audits between 2009 and 2017, roughly 10% of it from accounts deemed to be carrying on a business. The bigger share came from abusive schemes like swap transactions and prohibited investments, not ordinary traders.
The balanced view: who should (and shouldn't) worry
Most TFSA investors are fine. If you buy ETFs, index funds or solid companies and hold them, nothing in these rulings affects you. Picking your own stocks, selling a loser, or rebalancing a few times a year is not a business. The rules are aimed at patterns, not at occasional trades.
But the critics have real points. Tax professionals have pushed back on the CRA's approach for years:
- The line is blurry. The CRA has refused to say how many trades, or what account size, crosses it. Asked directly, it pointed to a bulletin written in 1984, long before online trading apps existed.
- It looks like winners get targeted. Tax lawyers have reported that audits often seem to be triggered simply by big gains. Traders who lose money rarely hear from the CRA, and losses from a TFSA "business" can't be used to reduce your other taxes.
- TFSAs and RRSPs are treated differently. Identical trading in an RRSP stays sheltered. Many feel that's an accident of drafting, not deliberate policy. The courts said fixing it is Parliament's job, not theirs.
- Retroactive bills hurt. Reassessments can reach back years, with interest, often after the money is spent.
The honest takeaway: the law is now settled even if it isn't fair. Until Parliament changes it, frequent traders carry a risk that buy-and-hold investors don't.
If you trade actively: a practical checklist
- Be honest about your pattern. Count your trades and average holding period for the past year. Daily or weekly flips of speculative stocks is the danger zone.
- Move active trading out of your TFSA. Do fast trading in a non-registered account, where losses can at least offset gains. Keep the TFSA for long-term holdings.
- Write down why you bought. A short note at purchase time is far better evidence than a story reconstructed years later in an audit.
- Watch the drift. A portfolio slowly shifting toward penny stocks and quick exits changes how your whole account looks.
- Keep your records six years. Trade confirmations and statements are what the CRA will ask for first.
- Get help early if a letter arrives. You generally have 90 days to object to a reassessment. Talk to a tax professional before you answer the CRA's questions, not after.
The bottom line
Your TFSA is tax-free for investing, not for running a trading business. Hold for the long term and the rules barely touch you. Trade like a professional, especially in speculative stocks, and you're betting that the CRA won't notice your wins. If it does, the bill can be bigger than if you'd never used a TFSA at all.
This article is general education, not tax, legal or investment advice. Whether your trading counts as a business depends on your specific facts. Speak to a qualified tax professional about your situation.