U.S. citizens living in Canada face a complex tax situation, particularly when it comes to investment income. The issue at hand revolves around the Net Investment Income Tax (NIIT), a 3.8% surtax imposed on high-income U.S. tax filers. For those residing in Canada, the situation becomes even more intricate due to the interplay between U.S. and Canadian tax laws.
The crux of the matter lies in the fact that U.S. citizens are required to file U.S. tax returns annually, reporting worldwide income. This creates a scenario where U.S. citizens in Canada face a combined federal and provincial tax rate exceeding 50% on investment income in eight out of ten provinces. The NIIT, introduced in 2013 under the Affordable Care Act, further complicates matters by not allowing foreign tax credits to offset the 3.8% surtax.
Two recent court cases have highlighted this issue. In the first case, a French couple, U.S. citizens residing in Paris, sold shares of a French company and paid tax in both France and the U.S., including NIIT. They argued that the France-U.S. tax treaty should eliminate double taxation, but the U.S. Court of Appeals for the Federal Circuit ruled against them, stating that the NIIT is not covered by the treaty.
The second case involved a Canadian taxpayer, Paul Bruyea, who lived in B.C. and sold Canadian real estate, incurring Canadian capital gains tax and NIIT. Bruyea attempted to offset the NIIT by claiming a foreign tax credit for the Canadian capital gains tax, relying on the Canada-U.S. tax treaty. However, the IRS disallowed the credit, leading to a full payment of the tax.
The Court of Federal Claims initially agreed with Bruyea's interpretation, but the government appealed. The Federal Circuit court concluded that the treaty's wording explicitly incorporates the limitation in U.S. domestic law, which restricts foreign tax credits from being claimed against the NIIT. This decision means that U.S. citizens in Canada may face an effective marginal tax rate of over 57% on investment income, a situation that Kevyn Nightingale, an accountant, describes as 'surprising and disappointing'.
The complexity of this tax situation underscores the importance of careful consideration and professional guidance for U.S. citizens living in Canada, especially when navigating the intricacies of international tax laws.
