Net Capital Loss Carryback After Death (2026): The s.164(6) Strategy Explained

Income Tax Act s.164(6)

Death can trigger a large capital gain under the deemed disposition rules.

But what if the estate later sells assets at a loss?

Parliament anticipated this mismatch.

Under ITA s.164(6), an estate may elect to carry back certain capital losses realized in the first taxation year of the estate to the deceased’s final return.

This is one of the most powerful post-mortem tax tools available to executors and family business advisors.

Used properly, it can eliminate or materially reduce terminal tax.

Let us examine how it works.

 

First Principle: Death Triggers Gains (ITA s.70(5))

Immediately before death, most capital property is deemed disposed of at fair market value.

This often creates:

• Taxable capital gains
• Significant terminal tax liability

The tax is calculated based on fair market value at date of death — not what the estate ultimately realizes.

If asset values decline shortly after death, there can be an economic loss — but tax was already assessed.

Section 164(6) addresses this inequity.

 

What Does s.164(6) Allow?

If, within the first taxation year of the estate:

The estate realizes a net capital loss, the estate may elect to:

Carry that loss back to the deceased’s final return and treat it as a capital loss of the deceased.

This can offset capital gains triggered on death.

It is not automatic.

An election is required.

 

Key Conditions for s.164(6)

To qualify:

1. The estate must be a Graduated Rate Estate (GRE).
2. The loss must arise in the estate’s first taxation year.
3. The loss must be a net capital loss.
4. A formal election must be filed with the estate’s T3 return.

If these conditions are not met, relief is unavailable.

 

What Is a Graduated Rate Estate (GRE)?

A GRE is:

• The estate that arose on death
• Designated as the GRE in its first T3 return
• Limited to a maximum of 36 months from death

GRE status is essential.

Without GRE designation, s.164(6) relief cannot be claimed.

 

Example Scenario

Deceased owned shares valued at:

$2,000,000 at date of death
Adjusted cost base: $500,000

Deemed capital gain: $1,500,000
Taxable capital gain (50% inclusion): $750,000

Terminal tax paid accordingly.

Within 8 months after death:

The estate sells the shares for $1,600,000.

Estate capital loss relative to deemed value:

$400,000

Under s.164(6), the estate may elect to carry back the net capital loss to offset part of the deceased’s terminal capital gain.

This can generate a tax refund to the estate.

 

Important Limitation

The loss must arise in the first taxation year of the estate.

If assets are sold after that period:

The carryback election is unavailable.

Timing is critical.

 

Interaction With Recapture

Section 164(6) applies to capital losses, not recapture.

Recapture of CCA is fully taxable income.

It cannot be offset by capital losses under s.164(6).

Asset composition matters.

 

Strategic Timing Considerations

Executors should:

• Monitor asset values post-death
• Consider selling depreciated securities within the first estate year
• Evaluate capital loss potential early

Delay may eliminate relief.

 

Interaction With Pipeline Planning

In private company contexts:

Post-mortem planning may include:

• Pipeline strategy
• Loss carryback under s.164(6)
• Combination of techniques

Where private shares decline in value after death, s.164(6) can reduce double taxation risk.

Coordinated tax and legal planning is required.

 

Filing the Election

The s.164(6) election:

• Is made with the estate’s T3 return
• Must be filed within prescribed deadlines
• Must clearly identify the loss being carried back

Failure to file properly eliminates relief.

 

Common Misunderstandings

“Any estate loss can be carried back.”
Only net capital losses in the first estate year qualify.

“It applies automatically.”
A formal election is required.

“It offsets all income.”
It offsets capital gains, not ordinary income or recapture.

“We can decide later.”
The timing window is strict.

 

Family-Owned Enterprise Context

For business owners:

Death may trigger large capital gains on private company shares.

If market value declines post-death:

A timely s.164(6) election can:

• Reduce terminal tax
• Improve estate liquidity
• Protect family wealth

Integration with corporate post-mortem planning is essential.

 

Strategic Planning for 2026

Immediately after death:

• Obtain date-of-death valuations
• Monitor asset performance
• Identify potential capital losses
• Confirm GRE designation
• Evaluate whether to trigger loss realization
• Coordinate with legal advisors

Proactive executor oversight preserves optionality.

 

Final Thoughts

Under ITA s.164(6), a Graduated Rate Estate may carry back net capital losses realized in its first taxation year to offset capital gains reported on the deceased’s final return.

This provision can materially reduce terminal tax.

But it is technical, time-sensitive, and election-based.

For families preserving generational wealth, post-mortem tax strategy is as important as pre-mortem planning.

At Shajani CPA, we integrate estate administration, corporate structuring, and tax elections with statutory precision.

Because legacy preservation requires disciplined post-mortem execution.

Tell us your ambitions, and we will guide you there.

 

This information is for discussion purposes only and should not be considered professional advice. There is no guarantee or warrant of information on this site and it should be noted that rules and laws change regularly. You should consult a professional before considering implementing or taking any action based on information on this site. Call our team for a consultation before taking any action. ©2026 Shajani CPA.

Shajani CPA is a CPA Calgary, Edmonton and Red Deer firm and provides Accountant, Bookkeeping, Tax Advice and Tax Planning service.