Alternative minimum tax can surprise your clients in years when everything else in their plan looks on track. A large capital gain, a successful business sale, a big stock option exercise, or a generous donation of securities can all trigger extra tax.
In this article, Wealth Professional Canada will highlight everything you need to know about alternative minimum tax. You can also browse the latest alternative minimum tax news when you scroll below!
Alternative minimum tax (AMT) is a parallel way of computing personal income tax. Your clients still calculate regular tax, using the usual rules for:
At the same time, the AMT rules recalculate income with fewer deductions and less generous treatment of certain items. Your clients then compare the two results. If regular tax is higher, they pay regular tax. If AMT is higher, they pay AMT instead for that year.
The goal of AMT is to limit how much a person can reduce tax in a single year through preferred forms of income and special deductions or credits. AMT is aimed at higher income taxpayers who rely on items such as capital gains or stock options to reduce tax to very low levels.
AMT can apply to:
It does not apply to:
This distinction is important when you discuss holding companies and trusts with your clients. A corporation is not subject to AMT, while most trusts are, and most of those trusts cannot claim the AMT exemption.
Watch this video to learn more about AMT:
AMT does not allow some of the same deductions, exemptions, and credits that reduce regular tax. Instead, taxable income is adjusted to arrive at adjusted taxable income (ATI). Once ATI is calculated, the next step is to subtract the AMT exemption to find net adjusted taxable income.
The AMT rate increased for years after 2023. A flat rate of 20.5 percent now applies to net adjusted taxable income, after the exemption. Before 2024, the rate was 15 percent.
Starting in 2024, the AMT exemption rose sharply. For 2025, this threshold is $177,882 and it is indexed each year. This increase can provide relief for many individuals whose income, after AMT adjustments, remains under that level.
According to the Canada Revenue Agency (CRA), if the total is $177,882 or less, they likely do not owe AMT. They can simply follow the basic instructions at line 41700 on the return.
However, if the total exceeds $177,882, they should complete Form T691 to compute AMT and report that amount on line 41700.
Most Canadians never hear about alternative minimum tax because they do not have the mix of income and deductions that trigger it. Your work as a financial advisor often places you in front of the people who are more exposed.
In general, those who might face AMT are higher income individuals and certain trusts that:
AMT will less likely apply if a person's income is mostly from:
These sources are fully taxed under both systems, and there are no major adjustments in calculating ATI. In many such cases, regular tax will exceed AMT.
Large capital gains are one of the more frequent triggers. Under the alternative minimum tax, the full gain is brought into ATI. If the person uses capital loss carryovers from prior years, only half of those losses reduce ATI.
This can create a mismatch. Regular tax might be very low or even close to zero after applying losses, while AMT stays high because income is not reduced as much. The larger the capital gain and the larger the use of old losses in one year, the higher the chance AMT could apply.
Current year capital losses work differently. A capital loss that arises in the same year as a capital gain can offset that gain for AMT in the same way it does for regular tax. The problem is mainly with losses that were carried forward from earlier years.
Donating publicly listed securities can eliminate regular tax on the accrued gain and provide a rich donation tax credit. Under the alternative minimum tax, this benefit is trimmed.
30 percent of the capital gain on the donated securities is brought into ATI. In addition, only 80 percent of the donation tax credit is allowed for AMT. When donations of securities are large, this combination can create alternative minimum tax even if regular tax is close to zero.
A person who leaves Canada is treated as having sold certain capital property at fair market value on the date they cease residency. Large deemed capital gains at departure can create exposure to AMT. This is because the alternative minimum tax still applies in the year the person leaves.
Recovering AMT after departure is difficult, since the person might not owe regular Canadian tax in later years. This can leave AMT as a permanent cost rather than a timing difference.
Prior year loss carryovers are only partly recognized for alternative minimum tax. However, current year capital losses can still fully offset current year gains. As such, realizing gains and losses in the same year can reduce AMT risk.
If your clients have capital losses in the current year that are larger than their current year gains, you can consider realizing extra gains before the end of the year. This timing allows those gains to be offset by the existing losses. This can then prevent the creation of a loss carryforward that would later be less effective for AMT.
This kind of sale and repurchase to trigger gains does not raise the same superficial loss concerns that exist for tax loss selling. Still, you need to consider transaction costs and market risk before making changes to your clients' portfolios.
Because corporations are not subject to alternative minimum tax, an investment holding company can sometimes reduce exposure to AMT on portfolio gains. Capital gains realized inside the corporation do not feed into a personal AMT calculation until cash is eventually paid out.
Of course, holding companies come with their own planning goals, costs, and legal considerations. They are not a simple fix, but they are worth discussing in AMT sensitive situations, especially around business exits and concentrated investment holdings.
Prescribed rate loan arrangements with family trusts should be revisited. Interest that is only half recognized under AMT, combined with the lack of an exemption for most trusts, can offset some of the income splitting benefits.
A cost‑benefit review with a tax professional can help decide whether to keep these arrangements or adjust them. The same is true when deciding whether to wind them up by selling investments and repaying the loan.
This might be appropriate if that approach better aligns with the current alternative minimum tax rules.
One critical point that you must tell your clients is that AMT is often a timing issue rather than a permanent tax. When they pay AMT in a year, the difference between AMT and regular tax becomes an AMT carryover.
This carryover can be used for up to seven future years. In any of those years where regular tax exceeds AMT, your clients can use the carryover as a credit to reduce regular tax. The credit cannot reduce AMT itself.
The best chance of recovery comes from years with fully taxable income rather than preferential income. Examples include:
Income that consists only of eligible dividends is less helpful. The top federal marginal rate on eligible dividends is close to the AMT rate. In turn, this leaves little room for a difference between regular tax and AMT. That small gap limits how much carryover can be recovered in a pure dividend income year.
For someone who has ceased to be a resident of Canada, recovery of AMT is much harder. This is because there might be little or no regular Canadian tax in later years to absorb the credit.
According to one tax expert, the alternative minimum tax is recoverable in almost all cases. Find out more when you read this linked article.
Alternative minimum tax can feel like an unpleasant surprise for your clients. This is especially true in years they link with success, such as a business sale or a large donation. As a financial advisor, your main role lies in helping your clients see where AMT might appear.
Remind them that AMT paid can often be recovered. You should also encourage early conversations with tax experts whenever large capital transactions, major gifts, or emigration decisions are on the table. With your knowledge on AMT, you can help your clients set expectations and avoid shocks.
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