U.S. Tax Obligations for Americans Living in Canada: The Cross-Border Basics

The U.S.-Canada cross-border tax challenge

The United States and Canada share the world's longest international border, and hundreds of thousands of U.S. citizens live, work, and retire in Canada. Many have done so for decades without fully understanding their U.S. tax obligations. Unlike most countries, the United States taxes its citizens on worldwide income regardless of where they live — meaning a U.S. citizen living in Toronto, Vancouver, or Calgary must file a U.S. tax return every year and report all of their income, including Canadian employment income, Canadian business income, and income from Canadian investment and retirement accounts.

The U.S.-Canada Income Tax Treaty

The United States and Canada have a comprehensive income tax treaty — the Canada-United States Tax Convention — that significantly reduces the risk of double taxation for cross-border taxpayers. The treaty generally allocates taxing rights between the two countries based on residence and source, provides reduced withholding rates on dividends, interest, and royalties flowing between the countries, and includes a tiebreaker provision to resolve dual-residency conflicts. The treaty also contains important provisions regarding the taxation of Canadian pension income — including the Canada Pension Plan (CPP), Old Age Security (OAS), and Registered Retirement Savings Plans (RRSPs) — in the hands of U.S. residents.

RRSPs and RRIFs: treaty-protected but still reportable

The Registered Retirement Savings Plan (RRSP) and the Registered Retirement Income Fund (RRIF) are the primary Canadian retirement savings vehicles. Under the U.S.-Canada treaty, a U.S. citizen residing in Canada can elect to defer U.S. taxation of RRSP and RRIF income until distributions are made — similar to the treatment of a traditional IRA. Without this election, the income accumulating inside the RRSP or RRIF would be taxable currently for U.S. purposes, eliminating the deferral benefit.

The treaty election for RRSP or RRIF deferral must be made on the U.S. tax return for the year in which the account is first held, by attaching Form 8891 — though this form has been discontinued and the IRS now allows the election to be made informally by disclosing the account and the election on the return. Regardless of the tax deferral election, RRSP and RRIF accounts must be reported on the FBAR and, depending on value, on Form 8938.

Tax-Free Savings Accounts (TFSAs) and the U.S. tax trap

The Tax-Free Savings Account (TFSA) is one of the most popular savings vehicles in Canada — contributions are made with after-tax dollars, earnings accumulate tax-free, and withdrawals are not taxed. From a Canadian tax perspective, TFSAs are straightforward. From a U.S. tax perspective, however, TFSAs are a trap. The U.S.-Canada treaty does not extend tax-free treatment to TFSAs for U.S. purposes. A U.S. citizen holding a TFSA must report the income and gains earned inside the account on their U.S. return each year. Depending on the investments held, the TFSA may also generate PFIC filing obligations and punitive PFIC tax treatment on foreign mutual funds held within the account.

Foreign tax credits and the elimination of double taxation

Because Canadian income tax rates are generally higher than U.S. rates for most income levels, many U.S. citizens in Canada find that the foreign tax credit largely or entirely eliminates their U.S. tax liability. Canadian income taxes paid can be claimed as a credit against U.S. income tax on the same income, subject to the applicable foreign tax credit limitation. The result, for many cross-border taxpayers, is that they owe no additional U.S. tax beyond what they pay to Canada — but they must still file the U.S. return, file the FBAR, and meet all other U.S. compliance obligations.

Living in Canada does not end your U.S. tax obligations — it complicates them. Our cross-border tax attorneys work with U.S. citizens and green card holders in Canada to maintain full compliance with both tax systems efficiently. Contact us to discuss your situation.