A practical expat tax example can show why living and working abroad does not necessarily mean paying U.S. tax twice. For U.S. citizens and green card holders in Canada, the real issue is usually not whether a U.S. return is required. It is. The issue is which forms, credits, and reporting rules apply to prevent an unnecessary balance owing while keeping both U.S. and Canadian filings accurate.
This example uses rounded figures and simplified assumptions. Actual results depend on residency, filing status, income source, currency conversion, provincial tax, deductions, foreign accounts, investments, and whether you are self-employed.
Expat Tax Example: U.S. Citizen Working in Canada
Assume Maya is a single U.S. citizen who has lived and worked in Toronto for the full 2025 calendar year. She is a Canadian tax resident and works as an employee for a Canadian company. Her employer pays her $130,000 USD equivalent in salary, and Canadian income tax withheld and paid on that employment income is $34,000 USD equivalent.
Maya has no U.S.-source income, no children, no self-employment income, and no significant deductions beyond the standard deduction. She has maintained a U.S. bank account and several Canadian accounts.
The following table illustrates the starting point for her U.S. federal return.
| Item | Illustrative amount in USD | |—|—:| | Canadian employment income | $130,000 | | U.S. standard deduction | $15,000 | | U.S. taxable income before foreign tax credits | $115,000 | | Estimated U.S. federal income tax before credits | $20,447 | | Canadian income tax paid on employment income | $34,000 |
Maya must report the full $130,000 of worldwide employment income on her U.S. Form 1040, even though she earned it in Canada and paid Canadian tax on it. Filing a Canadian T1 return does not replace her U.S. filing obligation.
Using the Foreign Tax Credit
For many Americans employed in Canada, the foreign tax credit is more useful than the foreign earned income exclusion. Canada often imposes higher combined income tax rates than the United States, particularly once federal and provincial taxes are considered.
Maya may be able to claim a foreign tax credit on Form 1116 for Canadian income taxes paid or accrued on her employment income. The credit is generally limited to the portion of U.S. tax attributable to foreign-source income. Because all of Maya’s wages were earned for work performed in Canada, the income is generally foreign-source for this calculation.
Her estimated U.S. income tax is $20,447. She paid $34,000 of eligible Canadian income tax. Subject to the detailed Form 1116 limitation rules, she could use up to $20,447 of foreign tax credits to reduce her U.S. federal income tax to zero.
The remaining $13,553 is not necessarily lost. Excess foreign tax credits may generally be carried back one year or carried forward for up to 10 years. Whether a carryforward is useful depends on future income, tax rates, income categories, and whether the taxpayer has U.S.-source income in later years.
This result does not mean Maya has no U.S. compliance work. It means the foreign tax credit may prevent double taxation on the same employment income.
Would the Foreign Earned Income Exclusion Be Better?
The foreign earned income exclusion, claimed on Form 2555, is another common option. For 2025, the maximum exclusion is $130,000 per qualifying individual. A taxpayer must generally meet either the physical presence test or the bona fide residence test to use it.
At first glance, Maya could exclude all $130,000 of her wages. That may appear simpler, but it is not always the strongest result. The exclusion applies only to earned income, not investment income, and it does not eliminate foreign bank account reporting. It can also limit the ability to claim foreign tax credits on the same excluded income.
For a Canadian employee with substantial Canadian taxes paid, the foreign tax credit often produces a better long-term outcome. It may preserve unused credit carryforwards and can be more flexible if income rises or investment income becomes a larger part of the household’s tax profile.
There are situations where the exclusion is appropriate. It can be beneficial for an expatriate living in a lower-tax country, someone with income below the exclusion limit, or a taxpayer with limited foreign income tax paid. The choice should be modeled before filing because changing methods in future years can create restrictions.
Foreign Account Reporting Is a Separate Requirement
A zero U.S. income tax balance does not remove foreign financial account reporting requirements.
Suppose Maya has a Canadian checking account, savings account, RRSP, and joint account with a total highest combined balance of $78,000 USD during the year. Because the aggregate balance exceeded $10,000 at any point, she generally must file an FBAR, formally FinCEN Form 114.
The FBAR is filed separately from the income tax return. It reports foreign accounts rather than calculating tax. Account values must be converted to U.S. dollars using accepted reporting methods, and joint accounts, signing authority, and account ownership must be reviewed carefully.
Maya may also need Form 8938, Statement of Specified Foreign Financial Assets, depending on the value of her foreign assets and her filing status. For unmarried taxpayers living abroad, the filing thresholds are generally higher than the FBAR threshold, but the rules are different. A taxpayer can be required to file both forms.
Canadian Investments Can Change the Analysis
The straightforward wage-earner example becomes more complex if Maya owns Canadian mutual funds, exchange-traded funds, a corporation, partnership interests, trusts, or rental property.
Many non-U.S. mutual funds and pooled investment products may be treated as passive foreign investment companies, commonly called PFICs, for U.S. tax purposes. PFIC reporting can involve Form 8621, specialized calculations, and unfavorable tax treatment if elections are not available or were not made on time.
A Canadian TFSA can also require careful U.S. review. Although it is tax-free in Canada, it does not automatically receive the same treatment under U.S. tax rules. Income inside the account may be currently taxable to the U.S. owner, and the structure may create additional reporting questions.
An RRSP is often more manageable under the Canada-U.S. treaty, but it should still be reported correctly. The investment holdings inside the RRSP, contribution history, withdrawals, and related foreign account reporting should be considered as part of the overall filing.
What Changes if the Expat Is Self-Employed?
Self-employment is where an expat tax example can become materially different. A U.S. citizen consulting from Canada may owe Canadian income tax and may also face U.S. self-employment tax unless a Canada-U.S. totalization agreement exemption applies.
The foreign tax credit can reduce U.S. income tax, but it generally does not offset U.S. self-employment tax. Coverage under the Canadian Pension Plan or Quebec Pension Plan may support an exemption, but the taxpayer usually needs proper documentation, such as a certificate of coverage. This should be addressed before filing, not after a large self-employment tax liability appears on the return.
Business owners may also have Canadian GST/HST obligations, payroll requirements, bookkeeping needs, and additional U.S. information returns if they operate through a Canadian corporation. Forms associated with foreign corporations carry significant penalties when missed, even where no U.S. income tax is due.
Filing Dates and Practical Records
Americans abroad generally receive an automatic extension to June 15 to file their U.S. federal return, although interest can still apply to unpaid tax after the regular April deadline. A further extension may be requested, but extensions to file do not extend the time to pay.
Maintain organized records for Canadian tax returns, T4 slips, notices of assessment, foreign tax payments, bank account maximum balances, investment statements, exchange rates, and prior-year U.S. returns. Currency conversion should be consistent and supportable. A Canadian tax refund, reassessment, or late payment can affect the foreign tax credit calculation on the U.S. return.
For Americans in Canada, cross-border tax compliance is not a one-form exercise. BOMCAS Canada can help coordinate U.S. and Canadian tax reporting, foreign tax credit calculations, FBAR compliance, and the tax issues that arise when employment, investments, or self-employment cross the border. The most useful next step is to review your records before filing season so the tax position is planned rather than repaired.













