U.S. Estate Tax Considerations for Canadian Residents: An Overview

For many Canadians, estate planning is viewed primarily through the lens of Canadian income tax. They are familiar with the concept of a deemed disposition at death and may have discussed wills, probate, or capital gains with their advisors. Consequently, it often comes as a surprise that the United States may also have an interest in a Canadian resident’s estate, even where that individual has never been a U.S. citizen, never held a U.S. green card, and never lived or worked in the United States.

The reason is straightforward. The United States does not limit its estate tax solely to U.S. citizens. In certain circumstances, it also taxes the transfer of U.S. situs property that is owned by non-residents. As a result, a Canadian resident who owns a winter home in Arizona, shares of U.S. public corporations, or other U.S.-situs assets may need to consider U.S. estate tax issues as part of an overall estate plan. Further, the U.S. estate tax rules pierce through any Canadian registered account status. This means, even if those Apple shares are owned through a RRIF or TFSA, there may still be U.S. estate tax implications.

The purpose of this article is to explain the framework that governs these situations. Rather than examining every technical rule, the discussion focuses on the questions that commonly arise during an initial consultation and the issues that should be identified before detailed planning begins.

Canada and the United States Tax Death Differently

Understanding the differences between the Canadian and U.S. systems is the key to understanding why cross-border estate planning can become complicated.

Canada generally does not impose a separate estate or inheritance tax. Instead, the Income Tax Act deems an individual to have disposed of all property immediately before death at fair market value. Any accrued gains become taxable on the terminal return unless a rollover or another relieving provision applies. The Canadian system is therefore primarily concerned with taxing unrealized appreciation.

The United States approaches death taxation differently. Rather than taxing accrued gains, it imposes an estate tax on the transfer of wealth. Although both systems may create significant tax liabilities, they do so for different reasons and are calculated differently. Appreciating this distinction helps explain why planning opportunities and compliance obligations often differ between the two countries.

Why a Canadian Resident May Have U.S. Estate Tax Exposure

Many people assume that U.S. estate tax applies only to Americans. In practice, the first question is not the nationality of the deceased but whether the deceased owned property that the Internal Revenue Code considers to be U.S. -situs assets.

For individuals who are neither U.S. citizens nor domiciled in the United States, the estate tax generally applies only to U.S.-situs assets. Consequently, two Canadian residents with estates of identical value may have entirely different U.S. estate tax profiles depending on the assets they own.

Consider a retired couple living in Victoria. One couple owns only Canadian investments. The other owns the same Canadian investments together with a condominium in Arizona and a portfolio of U.S. public company shares. Although their overall wealth is similar, only the second couple is likely to require a meaningful U.S. estate tax analysis.

U.S.-situs assets

Certain assets clearly fall within the U.S.-situs rules, while others require more careful analysis. U.S. real property is generally straightforward. Publicly traded shares of U.S. corporations are another common source of exposure. Other investments may require a review of their legal characteristics before a conclusion can be reached.

This distinction is important because clients often assume that holding U.S. investments through a Canadian brokerage account changes the answer. In most cases it does not. The legal character of the underlying investment is generally more important than the location of the financial institution that holds it.

Because determining U.S.-situs property deserves a detailed discussion of its own, that topic will be examined separately in the later article of this series.

Treaty Relief Often Changes the Practical Outcome

Finding U.S.-situs assets does not automatically mean U.S. estate tax will be payable. This is one of the most important concepts for Canadian families to understand.

The Canada–U.S. Income Tax Convention provides significant relief for many Canadian estates. Through provisions such as the prorated unified credit, many estates that would otherwise face tax under domestic U.S. law ultimately pay little or no U.S. estate tax. Nevertheless, treaty relief should not be viewed as permission to ignore the issue. Someone must still determine whether relief is available, whether it must be claimed, and whether a U.S. filing obligation exists.

In practice, the treaty often changes the amount of tax payable. It does not eliminate the need for analysis.

Filing of a U.S. Estate Tax Return by a non-U.S. person: Form 706-NA

Where a Canadian resident dies owning U.S.-situs property, the executor may also need to consider whether a U.S. estate tax return, Form 706-NA (United States Estate (and Generation-Skipping Transfer) Tax Return for the Estate of a Nonresident Not a Citizen of the United States), is required. Under domestic U.S. law, a filing obligation generally arises where the value of the decedent’s U.S.-situs assets exceeds US$60,000 at the date of death—a threshold that has remained unchanged for decades and is reached surprisingly quickly by many Canadians with U.S. investment portfolios or vacation properties. 

Fortunately, the Canada–U.S. Income Tax Convention often provides significant relief. Rather than limiting Canadian estates to the relatively small domestic exemption available to non-residents, the Treaty generally allows qualifying estates to claim a prorated unified credit based on the ratio of the decedent’s U.S.-situs assets to their worldwide estate. As a result, many Canadian estates ultimately pay little or no U.S. estate tax. In broad terms, a Canadian estate whose worldwide value does not exceed the equivalent of the U.S. estate tax basic exclusion amount (set at US$15 million for 2026, indexed annually for inflation) will frequently eliminate any U.S. estate tax liability through the Treaty. However, the availability of Treaty relief does not necessarily eliminate the filing requirement. The prorated unified credit is available only by claiming Treaty benefits, making the timely filing of Form 706-NA essential in many cases. Executors should therefore distinguish between whether a return must be filed and whether any tax will ultimately be payable, as the two questions are not always the same.

The Executor’s Perspective

After death, the executor becomes responsible for gathering information, identifying assets, coordinating advisors and ensuring that filing obligations are addressed in both jurisdictions. Cross-border estates frequently require additional documentation, valuation support and coordination that purely domestic estates do not.

From a practical standpoint, the greatest challenges often arise because no one considered the cross-border implications before death. Executors may be forced to reconstruct investment histories, locate supporting documents and obtain valuations under significant time pressure.

Planning Before It Is Needed

Most effective planning occurs long before an estate is administered. Periodically reviewing investment portfolios, ownership structures and family circumstances allows potential issues to be identified while planning options remain available.

Importantly, planning does not necessarily mean restructuring assets. In many cases the outcome of a review is simply confirmation that no changes are needed. The value of the exercise lies in understanding the exposure and documenting the reasons for the chosen approach.

Conclusion

Cross-border estate planning begins with understanding that Canada and the United States tax death in fundamentally different ways. Once that distinction is understood, the remaining analysis becomes much more logical: identify the assets, determine whether they are U.S.-situs, consider the relief available under the Canada–U.S. Treaty, and evaluate the resulting compliance obligations.

This article has intentionally focused on the overall framework. In the next article, we will examine the concept of U.S.-situs property in greater detail, because identifying the correct assets is often the foundation upon which every subsequent estate tax conclusion is built.

Key Takeaways

• Canadian residents can face U.S. estate tax issues even if they have never lived in the United States.
• The existence of U.S.-situs assets—not citizenship alone—is often the starting point of the analysis.
• The Canada–U.S. Treaty frequently reduces or eliminates tax but does not remove the need to evaluate filing obligations.
• Early identification of cross-border issues provides significantly more planning flexibility than waiting until estate administration.