Capital Loss Carryback Calculator
Compare the previous three returns and direct the loss toward the years where it could recover the most tax.
2023
2024
2025
Estimated refund opportunity
$8,500Prioritizes the highest entered tax rate
Loss applied
$20,000Loss still available
$0What this estimate includes
Enter the net capital loss available on CRA records and taxable capital gains—not gross proceeds—from each prior year.
The optimization is an estimate. Inclusion-rate adjustments can be required for historical losses from years with a different inclusion rate.
Watch the superficial loss rule: a loss is denied as a "superficial loss" if you, or an affiliated person such as your spouse or your own RRSP or TFSA, buy the identical security within 30 days before or after the sale and still hold it 30 days after. The denied loss is generally added to the ACB of the repurchased shares. The tax-loss selling calculator models the 30-day window.
Official sources
Questions this calculator answers
How far can a net capital loss be carried back?
A net capital loss can generally be applied against taxable capital gains in any of the previous three years.
Do unused capital losses expire?
Net capital losses can generally be carried forward indefinitely.
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