The Tax-Free Financial savings Account (TFSA) is among the greatest wealth-building instruments obtainable to Canadians. Tax-free development. Tax-free withdrawals. No impression on authorities advantages.
However relating to U.S. shares, there’s superb print many buyers overlook — and it may quietly cut back your returns.
Earlier than loading your TFSA with American blue chips or high-yield dividend shares, listed here are three guidelines that might materially have an effect on your portfolio that it is best to know.

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The 15% dividend withholding tax
The largest shock for a lot of buyers is that U.S. dividends in a TFSA are not absolutely tax-free.
As a result of the TFSA isn’t acknowledged underneath the Canada–U.S. tax treaty, dividends paid by U.S. firms are topic to a 15% non-recoverable withholding tax. That tax is robotically deducted by the Inner Income Service (IRS) earlier than the dividend even hits your account.
Capital good points stay tax-free — however revenue buyers really feel the drag.
For instance, in the event you maintain Comcast (NASDAQ:CMCSA), which yields roughly 4.2%, the precise yield inside a TFSA falls to about 3.6% after the 15% withholding tax. On a $500 annual dividend, you’d solely obtain $425.
The identical rule applies to Canadian-listed exchange-traded funds (ETFs) that maintain U.S. shares. As an example, Vanguard S&P 500 Index ETF nonetheless faces the identical U.S. dividend withholding on the fund stage.
Tips on how to reply? Think about inserting high-yield U.S. dividend shares inside a Registered Retirement Financial savings Plan (RRSP) or Registered Retirement Revenue Fund (RRIF), the place the treaty exempts them from withholding tax. In the meantime, high quality growth-focused names that pay little or no dividends — comparable to Amazon — might higher go well with a TFSA.
Forex conversion: The hidden price of buying and selling overseas shares
One other missed drag comes from overseas alternate charges.
If you purchase U.S. shares utilizing Canadian {dollars}, most brokerages cost a foreign money conversion unfold of 1.5% to 2% — on high of buying and selling commissions. In the event you commerce steadily, these prices quietly compound.
There are two sensible options.
First, take into account opening a U.S. dollar-denominated TFSA. This lets you convert foreign money as soon as, then commerce U.S. securities with out repeated overseas alternate fees.
Second, some buyers use Canadian depositary receipts (CDRs), which commerce in Canadian {dollars} and supply built-in foreign money hedging. Whereas handy, buyers ought to perceive the construction and embedded prices earlier than counting on them long run. It could make sense to make use of CDRs if the inventory you wish to put money into is obtainable there and U.S. {dollars} are sturdy in opposition to Canadian {dollars}.
Forex friction could appear minor, however over a long time, minimizing it may meaningfully increase compounded returns.
The day-trading lure
Lastly, the TFSA is designed for investing — not energetic buying and selling.
If the Canada Income Company (CRA) determines that your exercise resembles “carrying on a enterprise” — which means frequent, speculative buying and selling — your good points may grow to be absolutely taxable.
There is no such thing as a clear rule defining what number of trades set off scrutiny. As an alternative, the CRA considers components comparable to frequency, holding interval, data of markets, and intent. Briefly: deal with your TFSA like a long-term compounding machine, not a buying and selling account.
Investor takeaway
The TFSA stays an distinctive software — however U.S. shares introduce nuances that buyers shouldn’t ignore:
- U.S. dividends face a 15% non-recoverable withholding tax.
- Forex conversion charges can erode returns if not managed.
- Extreme buying and selling dangers shedding the TFSA’s tax-free standing.
Used properly, a TFSA can nonetheless be an excellent house for growth-oriented U.S. shares. However understanding the small print ensures you retain extra of what your investments earn — which, over time, could make a surprisingly massive distinction.