The complete tax guide for US citizens living in Canada

A US citizen living in Canada files two tax returns every year: a Canadian T1 because you live here, and a US Form 1040 because of your passport. The obligation does not end when you become a Canadian citizen, when you stop earning US income, or when decades pass. The good news is that the treaty and the foreign tax credit mean most people owe the IRS little or nothing. The bad news is that the reporting is heavy and several ordinary Canadian accounts behave badly on a US return.

Why you file two returns forever, and when each is due

The United States taxes its citizens on worldwide income regardless of where they live, one of very few countries that does. You must file a 1040 when gross income exceeds the standard filing threshold for your status, and a US citizen married to a non-US spouse who files separately has a threshold of only USD 5, which is why nearly every American in Canada has to file. Living abroad gives you an automatic extension to June 15, extendable to October 15 on Form 4868, but any tax owing still accrues interest from April 15. Our answer on whether US citizens in Canada have to file US taxes covers the exceptions, and there are almost none.

The year, in order:

• March 15: Form 3520-A if a foreign trust filing applies to you (some TFSA and RESP positions; see below).
• April 15: US tax payment deadline to stop interest; FBAR due, with an automatic extension to October 15.
• April 30: Canadian T1 and balance owing (June 15 to file if self-employed, balance still due April 30).
• June 15: automatic US filing deadline for residents abroad; Form 4868 if you need longer.
• October 15: extended 1040 and FBAR deadline.

What the treaty fixes, and what it leaves alone

The Canada-US tax treaty contains a saving clause that lets the US tax its citizens as if the treaty did not exist, with a short list of exceptions. That makes it less powerful for Americans in Canada than most people expect. What it does deliver:

• RRSP and RRIF deferral. Growth inside the plan is not taxed by the US until withdrawn, and since 2014 that deferral is automatic without a separate election form.
• Social security coordination. US Social Security paid to a Canadian resident is taxed only in Canada, at Canada's 85% inclusion rate.
• Foreign tax credit ordering. The treaty confirms which country taxes first on each type of income, which is what makes the credits work.
• Estate coordination that lines up Canada's deemed disposition at death with the US estate tax so most families are not taxed twice.

What it does not touch: the TFSA, the RESP, Canadian mutual funds and ETFs, the tax treatment of a Canadian corporation you control, and the sale of your principal residence, where the US exemption is a fixed dollar amount rather than Canada's unlimited one. Our dual citizen tax guide deals with each of these at length.

Foreign tax credit or foreign earned income exclusion: usually the credit

Americans abroad have two tools to stop double taxation on earned income. The foreign earned income exclusion on Form 2555 removes wages and self-employment income up to an indexed cap, roughly USD 130,000 as at the time of writing, from the US calculation entirely. The foreign tax credit on Form 1116 instead credits Canadian tax paid against US tax on the same income. For people in Canada we choose the credit in most cases, for four reasons:

1. Canadian rates are higher than US rates at almost every income level, so the credit usually wipes out the US liability and generates a carryforward that lasts ten years.
2. The exclusion covers earned income only; investment income, rental income and pensions still need the credit, so you end up running both systems.
3. Excluding income disqualifies you from the refundable additional child tax credit, which for families with children who have Social Security numbers is real money.
4. Revoking the exclusion once elected locks you out of it for five years without IRS consent, so switching later is not free.

The exclusion still wins for some people, notably those at modest incomes in lower-tax provinces or with unusual credit limitations. Our answer on the exclusion versus the credit for Americans in Canada shows how we decide.

Canadian accounts that behave badly on a US return

The TFSA is taxable in the US

The US does not recognize the TFSA. Interest, dividends and gains inside it are reported and taxed on your 1040 every year, and because no Canadian tax is paid there is no credit to offset the US tax. There is a further question of whether a TFSA is a foreign trust requiring Forms 3520 and 3520-A; IRS guidance in 2020 relieved many tax-favoured savings arrangements from that filing, but the position for TFSAs remains unsettled as at the time of writing and we assess it account by account. For most US citizens a TFSA holding anything other than cash is more filing than it is worth; see is a TFSA taxable for US citizens in Canada.

The RESP has the same problem, plus grant income

An RESP is likewise invisible to the treaty. The subscriber, usually the US parent, reports the growth annually, and the Canada Education Savings Grant is generally treated as US taxable income when it is paid in. Where one parent is not a US person, making that parent the sole subscriber removes the account from the US return entirely.

Canadian mutual funds and ETFs are PFICs

Almost every Canadian mutual fund and ETF is a passive foreign investment company in US law. Held in a non-registered account or a TFSA, each one requires Form 8621 annually, and under the default rules gains are taxed at the top rate with an interest charge as though earned evenly over the holding period. A QEF election softens this where the fund publishes a PFIC annual information statement, which many large Canadian fund families now do. Inside an RRSP the problem disappears, because the treaty-protected plan is exempt from 8621 reporting.

The practical answer is to hold US-listed ETFs or individual stocks outside registered plans and keep Canadian funds inside the RRSP. Details in are Canadian mutual funds and ETFs PFICs.

The RRSP works, with reporting

The RRSP is the account that behaves. Contributions are not deductible on the US return except for certain cross-border commuters, but growth is deferred and withdrawals are taxed in the US with a credit for the Canadian tax. It must still appear on the FBAR and, where the thresholds are met, Form 8938. Our answer on how an RRSP is treated on a US return explains basis tracking for people who contributed before moving.

FBAR and Form 8938: the information returns with the heaviest penalties

The FBAR (FinCEN Form 114) is required when the combined maximum value of all your non-US financial accounts exceeded USD 10,000 at any moment during the year. It counts chequing, savings, RRSPs, TFSAs, RESPs, non-registered brokerage accounts, joint accounts with a Canadian spouse and business accounts you can sign on. It is filed online with FinCEN, separately from the 1040, and it carries no tax at all; it is purely disclosure. The penalties for not filing are the reason it matters: an indexed amount per non-wilful violation and far more for wilful ones.

Our FBAR guide for Canada covers valuation, joint accounts and how to file. If you have missed years, read whether you can file FBARs for previous years before doing anything.

Form 8938 is the tax-return version of the same idea, attached to the 1040. For a US citizen living abroad the thresholds are higher: over USD 200,000 in specified foreign financial assets at year-end or USD 300,000 at any time for a single filer or one filing separately, and double those figures for a joint return. It overlaps with the FBAR and does not replace it. An unfiled 8938 can also keep the whole 1040 open to assessment indefinitely.

If you own a Canadian corporation

A Canadian-controlled private corporation owned more than 50% by US persons is a controlled foreign corporation in US law. That brings Form 5471 every year, with a penalty of USD 10,000 per missed form, and it brings US tax on some of the corporation's income in your hands even when nothing is paid out. Passive income inside the corporation is caught by the subpart F rules; active business income can be caught by the GILTI regime, which the 2025 US tax legislation reworked and renamed, so the exact mechanics should be confirmed at the time you plan. Elections and high-tax exceptions exist, and Canada's corporate rate is usually high enough to make them work, but they have to be claimed.

The traditional Canadian owner-manager playbook of retaining profits in the corporation at the small business rate does not translate cleanly for a US citizen, and the salary-versus-dividend decision needs both returns in view. We cover the setup in our guide to US tax preparation from Canada.

Catching up, and getting out

Streamlined Foreign Offshore Procedures

Many Americans in Canada learn about all of this in their forties, often from a bank asking about their citizenship. The IRS's Streamlined Foreign Offshore Procedures, available as at the time of writing, let a non-wilful taxpayer file the last three years of returns and six years of FBARs with a signed non-wilfulness statement and no penalties. You qualify if in at least one of those three years you had no US abode and were physically outside the US for at least 330 full days, which almost every Canadian resident meets. The catch-up is not small work, because the PFIC, TFSA and 5471 issues above all apply retroactively, but it closes the exposure completely; our streamlined filing guide explains what we prepare and in what order.

Renouncing citizenship

Some people decide the reporting is not worth the passport. Renunciation is done at a US consulate, carries a State Department fee, and requires a final Form 8854. If your net worth is USD 2 million or more, your average US tax liability over five years exceeds an indexed threshold, or you cannot certify five years of full compliance, you are a covered expatriate and face a deemed sale of worldwide assets above an indexed exclusion amount. Getting compliant first, often through the streamlined procedures, is what keeps most people out of that category; the steps are in the tax consequences of renouncing US citizenship from Canada.

We prepare Canadian and US returns together for US citizens across the GTA and beyond, so the credits, the treaty positions and the information returns are built from one set of facts. If you are filing both already, a second look at the account structure alone often pays for itself. If you have never filed, start with the streamlined guide and then talk to our cross-border team.

Sources: IRS — Report of Foreign Bank and Financial Accounts (FBAR) · IRS — Streamlined Filing Compliance Procedures · IRS — About Form 8621.