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CRA superficial loss calculator

Check whether a repurchase falls inside the CRA's 30-day superficial loss window around a Canadian stock sale at a loss, and find the safe date to rebuy without losing the deduction.

Sale & repurchase
Did you (or your spouse, or a corp/trust you control) buy it back?
$
If the sale is superficial, this is what gets added back to your ACB instead of deducted.
Enter a repurchase date to check.
If you're not buying it back, there's no superficial loss risk — the loss is fully deductible.
30-day window around your sale
Jun 18, 2026
Sale date
Aug 17, 2026
Window opens
Jun 18, 2026
Window closes
Aug 17, 2026
Safe rebuy date
Aug 18, 2026
The rule: buy the same or identical property within 30 days before or after the sale (in any account you or an affiliated person controls, including a TFSA/RRSP) and still hold it 30 days after the sale — the CRA denies the loss and adds it to the ACB of the shares you still hold. Not tax advice.
Not tax or legal advice. Always confirm capital gains reporting with a qualified accountant. · Made with love in Canada 🇨🇦
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