How to Turn a Client's $40,000 Loss Into a Tax Asset Under CRA Rules
A $40,000 capital loss sitting in a client's non-registered account this August is a tax asset that can be deployed backward, forward, or held until it matches the highest-value gain. The advisor's job is to route it correctly.
What the Loss Is Worth Before You Move It
The inclusion rate determines how much of the loss offsets taxable income. For individuals in 2026, the first $250,000 of capital gains in a year is taxed at a 50% inclusion rate. Above that threshold, gains are taxed at 66.67%. The same rates apply in reverse to losses.
That $40,000 loss is worth $20,000 of taxable income offset if applied against gains in the lower band, or $26,680 if applied against gains above $250,000. A client who sold a cottage this year for a $320,000 gain pays tax on the first $125,000 at the 50% rate and the remaining $195,000 at the 66.67% rate. The loss pulls them below the threshold entirely, saving roughly $2,600 in federal tax compared to applying it in a flat-rate scenario.
Most advisors assume all losses offset the same amount of tax. They do not. A $40,000 loss applied against gains above the $250,000 threshold saves $6,668 in federal tax. The same loss applied against gains below the threshold saves only $5,000. The difference compounds when the client has both types of gains in the same year.
The Three Directions You Can Send It
Capital losses can be carried back three years to recover taxes already paid, carried forward indefinitely to offset future gains, or used in the current year. The choice depends on the client's gain history and their tax bracket in each year.
A carryback makes sense when the client had a large taxable gain in 2023, 2024, or 2025 and paid tax on it. Filing a T1-ADJ (Adjustment Request) recoups that tax as a refund, often within 8 to 12 weeks. The CRA applies the loss to the year you specify, so if the client had a $60,000 gain in 2024 (all in the 50% band) and a $15,000 gain in 2025 (also 50%), you carry back $30,000 to 2024 and $10,000 to 2025. The inclusion-rate math has to match the year you are adjusting.
Carrying forward works when future gains are expected and the client's marginal rate is likely to rise. A 45-year-old business owner planning to sell their company in five years should bank the loss now and deploy it then, especially if the sale will push them into the 66.67% inclusion zone. The loss does not expire.
Using it this year is the default when the client has gains in 2026 and no better option. It zeroes out the tax bill today.
The Superficial Loss Trap
If the client, or their spouse, or a corporation they control, buys back the same security within 30 days before or after the sale, the CRA disallows the loss and adds the disallowed amount to the adjusted cost base of the new position. When the replacement shares are eventually sold, the deferred loss reduces the gain at that time.
The 30-day window runs both directions from the settlement date, making it a 61-day span. With T+1 settlement (effective since 2024), a sale on December 30 settles December 31, meaning the client cannot repurchase until January 31 of the following year without triggering the rule.
Switching from TD's S&P 500 fund to BMO's S&P 500 fund does not sidestep this. The CRA defines "identical property" by economic substance, not by fund company. An index swap or a comparable ETF with different sector weights may work, but that is a case-by-case call.
When the Loss Beats Other Income
Capital losses generally offset capital gains only. The exception is an Allowable Business Investment Loss, which arises from shares or debt of a Canadian-Controlled Private Corporation that qualifies as a small business. Fifty percent of that loss offsets salary, interest, and other income. It is the only capital loss with that power.
A client who lent $80,000 to a qualifying startup that went under has a $40,000 ABIL. That $40,000 can be used against their $150,000 salary, reducing taxable income in the current year. After ten years, any unused portion converts to a standard net capital loss and can only offset gains from that point forward.
A $40,000 capital loss sitting in a client's non-registered account this August is a tax asset that can be deployed backward, forward, or held until it matches the highest-value gain. The advisor's job is to route it correctly.
What the Loss Is Worth Before You Move It
The inclusion rate determines how much of the loss offsets taxable income. For individuals in 2026, the first $250,000 of capital gains in a year is taxed at a 50% inclusion rate. Above that threshold, gains are taxed at 66.67%. The same rates apply in reverse to losses.
That $40,000 loss is worth $20,000 of taxable income offset if applied against gains in the lower band, or $26,680 if applied against gains above $250,000. A client who sold a cottage this year for a $320,000 gain pays tax on the first $125,000 at the 50% rate and the remaining $195,000 at the 66.67% rate. The loss pulls them below the threshold entirely, saving roughly $2,600 in federal tax compared to applying it in a flat-rate scenario.
Most advisors assume all losses offset the same amount of tax. They do not. A $40,000 loss applied against gains above the $250,000 threshold saves $6,668 in federal tax. The same loss applied against gains below the threshold saves only $5,000. The difference compounds when the client has both types of gains in the same year.
The Three Directions You Can Send It
Capital losses can be carried back three years to recover taxes already paid, carried forward indefinitely to offset future gains, or used in the current year. The choice depends on the client's gain history and their tax bracket in each year.
A carryback makes sense when the client had a large taxable gain in 2023, 2024, or 2025 and paid tax on it. Filing a T1-ADJ (Adjustment Request) recoups that tax as a refund, often within 8 to 12 weeks. The CRA applies the loss to the year you specify, so if the client had a $60,000 gain in 2024 (all in the 50% band) and a $15,000 gain in 2025 (also 50%), you carry back $30,000 to 2024 and $10,000 to 2025. The inclusion-rate math has to match the year you are adjusting.
Carrying forward works when future gains are expected and the client's marginal rate is likely to rise. A 45-year-old business owner planning to sell their company in five years should bank the loss now and deploy it then, especially if the sale will push them into the 66.67% inclusion zone. The loss does not expire.
Using it this year is the default when the client has gains in 2026 and no better option. It zeroes out the tax bill today.
The Superficial Loss Trap
If the client, or their spouse, or a corporation they control, buys back the same security within 30 days before or after the sale, the CRA disallows the loss and adds the disallowed amount to the adjusted cost base of the new position. When the replacement shares are eventually sold, the deferred loss reduces the gain at that time.
The 30-day window runs both directions from the settlement date, making it a 61-day span. With T+1 settlement (effective since 2024), a sale on December 30 settles December 31, meaning the client cannot repurchase until January 31 of the following year without triggering the rule.
Switching from TD's S&P 500 fund to BMO's S&P 500 fund does not sidestep this. The CRA defines "identical property" by economic substance, not by fund company. An index swap or a comparable ETF with different sector weights may work, but that is a case-by-case call.
When the Loss Beats Other Income
Capital losses generally offset capital gains only. The exception is an Allowable Business Investment Loss, which arises from shares or debt of a Canadian-Controlled Private Corporation that qualifies as a small business. Fifty percent of that loss offsets salary, interest, and other income. It is the only capital loss with that power.
A client who lent $80,000 to a qualifying startup that went under has a $40,000 ABIL. That $40,000 can be used against their $150,000 salary, reducing taxable income in the current year. After ten years, any unused portion converts to a standard net capital loss and can only offset gains from that point forward.
Routing the loss incorrectly is the failure.
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