A US citizen living in Canada owes tax returns to both the IRS and the Canada Revenue Agency every year, because the United States taxes its citizens on worldwide income no matter where they live, while Canada taxes based on residency. For the 2026 tax year, you must file a US return once your worldwide gross income reaches $16,100 (single, under 65) or $32,200 (married filing jointly, both under 65).1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Self-employed? The threshold drops to $400 of net earnings.2Internal Revenue Service. Who Needs to File a Tax Return The rest of the compliance picture — treaty positions, retirement accounts, foreign account reporting, and Canadian investment traps — flows from that basic dual-filing reality.
Who Files What, and When
US filing turns on citizenship. If you hold a US passport or a green card and your gross income meets the threshold for your status, the IRS wants a Form 1040 regardless of where every dollar was earned.3Internal Revenue Service. US Citizens and Residents Abroad – Filing Requirements
Canadian filing turns on residency, which the CRA determines factually: a home available to you in Canada, a spouse or dependents living there, and the broader web of social and economic ties. If you qualify as a resident, you file a T1 General return by April 30 of the following year.4Canada Revenue Agency. Filing Due Dates for the 2025 Tax Return
US deadlines shift for people abroad. You get an automatic two-month extension to June 15.5Internal Revenue Service. US Citizens and Resident Aliens Abroad – Automatic 2-Month Extension of Time to File Filing Form 4868 by that date buys you until October 15.6Internal Revenue Service. US Citizens and Resident Aliens Abroad – Automatic 6-Month Extension of Time to File Both extensions apply to filing only. Interest on any unpaid tax runs from April 15.
How the Treaty Prevents Double Tax
The US-Canada Income Tax Treaty is what keeps you from paying full freight to both governments on the same income. It assigns each type of income a primary taxing country and sets tie-breaker rules for people the two countries could each claim as a resident.
When both countries could reasonably treat you as a resident, the treaty runs through these tests in order:
- Permanent home. The country where you have a permanent home available to you wins. If both, go to the next test.
- Center of vital interests. Whichever country holds the closer personal and economic ties — job, family, community, banking — takes priority.
- Habitual abode. If vital interests are a wash, the tie goes to where you actually spend your time.
- Citizenship. Last resort. For dual citizens still not resolved, the two tax authorities negotiate.
Treaty residency is a factual determination based on your living situation, accounts, family, and time in each country. To formally claim a treaty-based position on your US return, use Form 8833.7Internal Revenue Service. About Form 8833, Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b)
Foreign Tax Credit vs. Foreign Earned Income Exclusion
Two mechanisms in the US tax code do the actual work of preventing double taxation, and for most US citizens in Canada the choice is straightforward.
The Foreign Tax Credit, claimed on Form 1116, gives you a dollar-for-dollar credit against US tax for Canadian income tax you already paid. Because combined Canadian federal and provincial rates generally exceed US federal rates, the credit usually wipes out your US liability on Canadian-source income. You separate income into categories (passive, general, and a few others), and each category’s credit is capped at the US tax that category would have generated on its own. Unused credits carry back one year or forward up to ten.8Internal Revenue Service. Topic No. 856, Foreign Tax Credit The FTC’s real strength is scope: it covers wages, business income, investment income, rents, and capital gains.
The Foreign Earned Income Exclusion, on Form 2555, lets you exclude up to $132,900 of foreign earned income for 2026, or up to $265,800 combined for a working couple who both qualify. A separate housing exclusion covers certain housing costs above a base amount, up to $39,870 for 2026.9Internal Revenue Service. Figuring the Foreign Earned Income Exclusion You qualify through the Bona Fide Residence Test (Canadian resident for an uninterrupted period covering a full tax year) or the Physical Presence Test (330 full days outside the US in any 12 consecutive months).10Internal Revenue Service. Foreign Earned Income Exclusion – Physical Presence Test
For Canada, the exclusion is usually the wrong tool. Canadian rates are high enough that the FTC already zeroes out US tax on earned income, and the FEIE creates a stacking effect: excluded income still counts when setting the tax rate on your remaining income, which pushes investment earnings and other non-excludable amounts into higher brackets. You can switch between the two, but once you revoke an FEIE election you generally cannot re-elect for five years without IRS approval.
Retirement Income Under the Treaty
Retirement income has its own set of rules that sit on top of the general treaty framework. These are the provisions where mistakes most reliably create double taxation.
RRSPs and RRIFs
Registered Retirement Savings Plans and Registered Retirement Income Funds grow tax-deferred in Canada, and the treaty preserves that deferral for US purposes. Since 2015, the deferral election is automatic. Revenue Procedure 2014-55 made Form 8891 obsolete and treats eligible beneficiaries as having made the treaty election in the first year they qualified.11Internal Revenue Service. Election Procedures and Information Reporting with Respect to Interests in Certain Canadian Retirement Plans (Rev. Proc. 2014-55) Form 3520 is not required for the RRSP or RRIF itself.
Two caveats. First, the US does not allow a deduction for RRSP contributions, so a contribution reduces your Canadian taxable income but not your US taxable income. Distributions are taxable on your US return under standard retirement account rules. Second, the revenue procedure only removes the trust reporting obligation. Your RRSP and RRIF balances still count toward FBAR and Form 8938 thresholds.
Social Security, CPP, and OAS
The treaty flipped the normal sourcing rules for cross-border government benefits. US Social Security paid to a Canadian resident is taxable only in Canada, not the US.12Internal Revenue Service. IRS Notice 98-23 The treaty’s saving clause, which normally preserves the US right to tax its own citizens, specifically does not apply to this provision.13Government of Canada. United States – Canada Income Tax Convention Canada taxes the benefit but exempts 15% of the amount.14Government of Canada. Protocol Amending the Convention between Canada and the United States of America The mirror image also holds: CPP and Old Age Security paid to a US resident are taxable only in the United States.
The Totalization Agreement
A separate US-Canada Social Security Totalization Agreement prevents double social security taxation on the same earnings. If you live and work in Canada, you generally pay into CPP, not US Social Security.15Social Security Administration. Agreement Between The United States And Canada Self-employed US citizens residing in Canada pay CPP. If a US employer sends you to Canada temporarily, a certificate of coverage can keep you in the US system.
Reporting Your Canadian Accounts
The tax return is only half the annual paperwork. US citizens with Canadian financial accounts face two separate disclosure regimes. These forms generally produce no tax, but the penalties are harsh enough to dwarf the actual tax bill they accompany.
FBAR (FinCEN Form 114)
If the combined value of your foreign financial accounts exceeds $10,000 at any point during the year, you file a Report of Foreign Bank and Financial Accounts.16Financial Crimes Enforcement Network. Report Foreign Bank and Financial Accounts That threshold is so low that a checking account and any modest retirement savings will trip it. Reportable accounts include checking, savings, brokerage, RRSP, RRIF, and TFSA. You report each account’s maximum value during the year, converted to US dollars.
The FBAR is filed electronically through the BSA E-Filing System, not with your tax return.17Financial Crimes Enforcement Network. How Do I File the FBAR? The deadline is April 15 with an automatic extension to October 15.
Penalties are the reason to take this seriously. A non-willful failure to file currently carries a maximum penalty exceeding $16,000 per violation, per year. Willful failure runs to more than $165,000 or 50% of the account balance, whichever is greater. These amounts adjust annually for inflation.18Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
FATCA (Form 8938)
Form 8938 is a parallel disclosure filed with your tax return under the Foreign Account Tax Compliance Act. Its scope is broader than the FBAR — it includes financial accounts plus non-account assets like interests in foreign trusts or foreign stock held directly.19Internal Revenue Service. About Form 8938, Statement of Specified Foreign Financial Assets
Thresholds are higher for taxpayers living abroad. A single filer must file Form 8938 if total foreign financial assets exceed $200,000 on the last day of the tax year or $300,000 at any point during the year. For married couples filing jointly, the figures are $400,000 and $600,000.20Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
The penalty for failing to file Form 8938 starts at $10,000. If the IRS notices you and you still don’t file within 90 days, an additional $10,000 accrues for each 30-day period of continued non-compliance, up to $50,000 in additional penalties. Failure to report foreign financial assets can also extend the statute of limitations on your entire return from three years to six.21Internal Revenue Service. Instructions for Form 8938
The two forms overlap heavily, and yes, you may have to report the same accounts on both. FBAR goes to FinCEN. Form 8938 goes to the IRS with your return. Different agencies, different thresholds, same accounts.
Canadian financial institutions report information on US account holders to the CRA, which passes it to the IRS under an intergovernmental agreement. Non-disclosure is not a workable strategy.
Canadian Investment Accounts That Cause US Problems
Several Canadian tax-advantaged accounts work beautifully under Canadian rules and poorly, or terribly, under US rules. Knowing which is which matters more than almost any other single planning decision.
Tax-Free Savings Accounts
The TFSA is Canada’s flagship tax-free vehicle. The IRS does not recognize the shelter. For US purposes, a TFSA is treated as a foreign trust, so the income inside it — dividends, interest, capital gains — is currently taxable on your US return.22Internal Revenue Service. About Form 3520, Annual Return To Report Transactions With Foreign Trusts and Receipt of Certain Foreign Gifts The foreign trust classification also triggers Form 3520 and Form 3520-A, each carrying a starting penalty of $10,000 for a missed filing.23Internal Revenue Service. Instructions for Form 3520 For many US citizens in Canada, the compliance cost of a TFSA exceeds anything the account will ever earn, and skipping the account entirely is the cleanest option.
Registered Education Savings Plans
The RESP is a Canadian vehicle for saving toward a child’s post-secondary education. The IRS also treats it as a foreign trust, but Revenue Procedure 2020-17 exempts certain tax-favored foreign savings plans, including RESPs, from Form 3520 and Form 3520-A filing.24Internal Revenue Service. Instructions for Form 3520 – Section: Exceptions to Filing The trust paperwork problem is gone, but the underlying tax treatment is not. Earnings inside the RESP are currently taxable on your US return, and you cannot deduct or credit the contribution. An RESP can still make sense if you value the Canadian Education Savings Grant match, but factor annual US tax on the earnings into the real return.
Canadian Mutual Funds and ETFs
This is the sharpest edge in the whole cross-border landscape. Canadian mutual funds and most Canadian-listed ETFs are Passive Foreign Investment Companies for US tax purposes. A PFIC is any foreign corporation with at least 75% passive gross income or at least 50% of assets producing passive income, which sweeps in essentially every Canadian investment fund.25Office of the Law Revision Counsel. 26 USC 1297 – Passive Foreign Investment Company
The PFIC regime is designed to be punitive. When you sell a PFIC or receive a large distribution, the gain is spread back across your holding period and taxed at the highest marginal rate for each year, with an interest charge for the deferral. You file Form 8621 for each PFIC you own, which for a diversified fund portfolio can mean dozens of forms.26Internal Revenue Service. About Form 8621, Information Return by a Shareholder of a Passive Foreign Investment Company or Qualified Electing Fund
Two elections can soften the treatment. A Qualified Electing Fund election lets you include the fund’s ordinary earnings and capital gains annually at regular rates, but Canadian funds rarely provide the statements needed. A mark-to-market election is available for publicly traded PFICs. For total PFIC holdings valued at $25,000 or less ($50,000 on a joint return), simplified reporting can reduce paperwork.27Internal Revenue Service. Instructions for Form 8621
The practical answer for most US citizens in Canada is to hold individual stocks, bonds, or US-listed ETFs and avoid Canadian mutual funds and ETFs entirely.
Estate and Gift Tax Exposure
US citizens owe federal estate tax on worldwide assets regardless of where they live. For 2026, the exemption is $15,000,000 per person following the One, Big, Beautiful Bill Act signed in 2025.28Internal Revenue Service. What’s New – Estate and Gift Tax Below the exemption, no federal estate tax is due. Married couples can combine exemptions with proper planning.
Canada does not levy an estate tax, but it does impose a deemed disposition at death that treats all assets as sold at fair market value on the date of death, triggering capital gains tax. For large estates, the interaction of US estate tax and Canadian deemed disposition can generate double taxation on the same assets. The treaty and the FTC help, but this is territory for advance planning.
The annual gift tax exclusion for 2026 is $19,000 per recipient.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Gifts above that count against your lifetime estate tax exemption. If you receive a gift or inheritance from a non-US person exceeding $100,000 in a year, you report it on Form 3520 for disclosure — no tax attaches.29Internal Revenue Service. Gifts from Foreign Person
If You’re Thinking About Renouncing
Some US citizens in Canada eventually consider giving up citizenship to end the annual filing. Section 877A imposes an exit tax that treats you as having sold all worldwide assets at fair market value the day before expatriation, with gain above an inflation-adjusted exclusion (statutory floor of $600,000) taxed immediately.30Office of the Law Revision Counsel. 26 USC 877A – Tax Responsibilities of Expatriation
The exit tax applies only if you are a “covered expatriate,” which you become if any of the following is true:
- Net worth of $2 million or more on the date of expatriation.
- Average annual net income tax for the prior five years exceeds an inflation-adjusted threshold ($206,000 for 2025; the 2026 figure appears in the Form 8854 instructions).31Internal Revenue Service. Expatriation Tax
- You cannot certify five prior years of full tax compliance.
RRSPs and other deferred compensation get separate treatment and may be subject to 30% withholding on future distributions instead of the deemed sale. You report the exit tax on Form 8854 with your final dual-status return. For anyone with substantial assets, the numbers deserve serious modeling before you file the renunciation paperwork.
Catching Up If You’re Behind
Many US citizens in Canada learn about their filing obligations years after crossing the border. The IRS runs specific programs for this situation, and using one before the IRS finds you generally costs less than any other option.
Streamlined Foreign Offshore Procedures
If your non-compliance was non-willful — meaning negligence, honest mistake, or good-faith misunderstanding — the Streamlined Foreign Offshore Procedures let you get current without penalties.32Internal Revenue Service. Streamlined Filing Compliance Procedures You file three years of delinquent returns and six years of delinquent FBARs with a signed certification explaining the non-compliance. The IRS waives failure-to-file penalties, accuracy-related penalties, information return penalties, and FBAR penalties.33Internal Revenue Service. US Taxpayers Residing Outside the United States
You cannot use the program if the IRS has begun a civil exam of your returns or if you are under criminal investigation.32Internal Revenue Service. Streamlined Filing Compliance Procedures The certification is signed under penalty of perjury. A false certification turns a compliance issue into a criminal one.
Delinquent FBAR Submission
If the only lapse is missing FBARs — returns were filed and all income was reported — the Delinquent FBAR Submission Procedures are simpler. File the missing FBARs electronically with a statement explaining the delay. The IRS will not impose penalties if the underlying income was reported and you have not already been contacted about the filings.34Internal Revenue Service. Delinquent FBAR Submission Procedures
Don’t Forget the State You Left
Federal tax is not the whole story. If you kept legal domicile in a US state before moving to Canada, that state may still treat you as a resident. Some states are aggressive about holding on to residents who move abroad, and shedding residency requires affirmative steps: establishing a permanent home elsewhere and cutting local ties like voter registration and a driver’s license. States with no income tax present no issue. If your last US address was in an income-tax state, check its non-residency rules before assuming your only remaining obligation is federal. A missing final state return can produce assessments and penalties years down the road.