Capital Gains, Capital Losses and Your CDA Balance

Introduction

For most private corporations with an investment portfolio, capital gains are the largest ongoing contributor to the capital dividend account.

The principle behind the credit is straightforward. Only part of a capital gain is taxed. The part that is not taxed has already borne no tax inside the corporation, so it should be able to reach the shareholders without tax as well.

What makes this component difficult in practice is not the principle. It is that capital losses work in exactly the same way in reverse, and most corporations pay far less attention to the losses than to the gains.

The Current Inclusion Rate

The size of the credit depends directly on how much of a capital gain is taxable.

The federal government proposed in 2024 to increase the taxable portion of capital gains from one half to two thirds. That proposal was deferred and then cancelled in March 2025. The taxable portion remains one half.

So for 2026, a corporation realizing a capital gain credits half of that gain to its account.

This matters when reviewing older files. A considerable volume of commentary and client material prepared during 2024 and early 2025 assumed the higher rate would take effect. Calculations carried forward from that period will not reflect the law as it stands, and the direction of the error depends on when the gain was realized and what assumption was applied.

Any planning document from that window should be checked rather than relied upon.

How Losses Reduce the Balance

The non-deductible portion of a capital loss reduces the account by the same logic that governs gains.

Half of a capital loss is not deductible. That non-deductible half reduces the amount the corporation can distribute without tax.

The effect is cumulative and runs across the corporation’s whole history, not year by year. A loss realized several years ago continues to affect the balance available today.

This is where most calculation errors originate. Gains attract attention because they produce a tax bill. Losses in a year when no dividend was contemplated often attract none, and they are the amounts most frequently missed when a balance is reconstructed later.

The Component Does Not Go Negative

An important feature of the structure protects corporations in one respect and traps them in another.

The gains and losses component is calculated separately from the other contributors to the account, such as life insurance proceeds. Where it produces a negative figure, it is treated as nil rather than carried as a negative amount.

The protection is that a period of heavy losses cannot consume a credit arising from a life insurance policy.

The trap is that the components do not offset in the other direction either. A corporation cannot use a positive insurance credit to shelter a negative gains position, and anything already distributed from the gains component has already been distributed.

Sequence Determines the Outcome

Because the balance is measured at a point in time rather than at a year end, the order in which events occur changes what is available.

Consider a portfolio holding both unrealized gains and unrealized losses. Three events are contemplated: realizing the gains, declaring a dividend, and realizing the losses.

Realizing gains, declaring the dividend, then realizing losses produces a different result from realizing everything first and then declaring.

This is not aggressive planning. It is recognizing that the account responds to transactions as they occur, and that a corporation with discretion over timing has a decision to make.

The factors that determine the available balance at any moment are:

• Capital gains realized to that date
• Capital losses realized to that date
• Capital dividends previously paid
• Other components, each calculated separately

Where Discretion Exists and Where It Does Not

Corporations should be careful not to overstate their flexibility here.

Investment decisions should be driven by investment considerations. Realizing a gain in order to create room in the account, where the position would not otherwise be sold, is a poor reason to trade.

The genuine discretion is usually narrower. It concerns timing within a window, where a sale is going to happen anyway, and whether a dividend is declared before or after a planned transaction.

Where a loss is going to be realized for portfolio reasons, knowing that it will reduce the available balance allows the dividend decision to be made with that in view rather than afterward.

Reserves and Deferred Gains

Where a gain is not fully recognized in the year of sale, because part of the proceeds is receivable over time and a reserve is claimed, the credit follows the recognition rather than the original sale.

This affects corporations that sell property on terms rather than for immediate payment.

The practical consequence is that the credit arrives in instalments across several years. A corporation planning a distribution on the strength of a large sale should confirm how much of the gain has actually been recognized to date.

Reconstructing the History

For a corporation of any age, the gains and losses component is the hardest part of the balance to verify.

It runs from the time the corporation became a private corporation. It spans every year since, often across multiple advisors and accounting systems, and for amalgamated corporations it includes the history of each predecessor.

The reconciliation should be made against the corporation’s filed returns for each year rather than against internal records, which may not agree.

Where the Canada Revenue Agency’s own figure is available, comparing against it is worthwhile. It is provided as a courtesy rather than as a binding confirmation, but a discrepancy is a signal worth investigating before a dividend is declared.

Common Planning Mistakes

Several errors recur.

Tracking gains carefully while overlooking losses, particularly losses from years when no distribution was contemplated.

Assuming the components offset one another, when each is calculated separately and floored at nil.

Relying on a balance calculated before the 2025 cancellation of the proposed inclusion rate change.

Declaring a dividend and then realizing losses in the same window, without considering the effect on the amount already elected.

Treating the balance as a year end figure when it responds to transactions as they occur.

Conclusion

Capital gains credit the capital dividend account by the portion of the gain that is not taxable, which remains one half following the cancellation of the proposed increase in March 2025.

Capital losses reduce the balance by their non-deductible portion, cumulatively and across the corporation’s entire history. These are the amounts most often missed.

The gains and losses component is calculated separately from other contributors and is floored at nil, so it cannot be offset against a positive insurance credit in either direction.

Because the balance responds to transactions as they occur rather than at a year end, the sequence of realizing gains, declaring dividends and realizing losses affects what is available.

The history should be reconciled against filed returns, and against the Agency’s own figure where available, before any dividend is declared.

Tax Partners can assist you in structuring your affairs properly and ensuring full compliance while optimizing your tax position.

This article is written for educational purposes.
 

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