Do US Citizens Living Abroad Pay Taxes? The Real Answer

Yes — US citizens living abroad file US tax returns, for life, wherever they live. That is the blunt half of the answer. The half that changes how people feel about it: most American expats who file properly end up owing little or no US tax, because the relief system is generous once it is actually claimed. Filing and paying are two different obligations, and almost every horror story confuses them.

The United States is nearly alone in taxing on citizenship rather than residence. A US citizen in Toronto, London or Dubai has the same federal filing obligation as one in Chicago: report worldwide income on a 1040, every year the income crosses the ordinary filing threshold for their status.

But the obligation to file is not an obligation to pay. Between the foreign earned income exclusion, the foreign tax credit and the treaty network, the US system is built so that tax already paid to the country you live in offsets the US claim on the same income. Someone paying Canadian or German rates — higher than US rates on most income — usually ends up with a US return showing little or nothing owed.

The catch, and it is the catch that runs through this whole subject: every piece of that relief exists only on a filed return. Not filing does not make the obligation disappear — it makes the relief disappear while the obligation compounds quietly.

• US citizens — including those who have never lived in the United States. Citizenship acquired at birth through a parent, or by being born on US soil during a family's brief stay, carries the full obligation. These are the "accidental Americans," and discovering the obligation decades in is common enough that a dedicated procedure exists for coming into compliance.
• Green card holders — lawful permanent residence makes you a US tax resident, and moving away does not end it. The status persists for tax purposes until formally abandoned or administratively terminated, which is why a green card in a drawer in another country is still generating filing obligations. See giving up a green card.
• Dual citizens — the US half of the pair governs. A US–Canadian dual citizen in Vancouver files in both countries; the passports do not cancel out. The both-countries mechanics get their own guide.

Who is not caught: a non-citizen without a green card who lives outside the US owes American tax only on US-source income — the system follows status, and without the status there is nothing to follow.

The pattern worth noticing: half of the list is information reporting keyed to balances, not income. An expat with modest earnings and a lifetime of local savings can owe zero tax and still have three forms due — and the penalty regimes on those forms are attached to the form, not the tax. The FBAR and 8938 pairing is compared in detail at FBAR against Form 8938.

Three mechanisms, stackable in one return but never on the same dollar:

In a higher-tax country — Canada, the UK, Germany, Australia — the credit alone usually zeroes the US liability on earned income, and generates carryover besides. In a low-tax or no-tax country — the UAE, Singapore on foreign income — the exclusion does the work instead, because there is little or no local tax to credit. Which tool to lead with is a genuine decision with long-term consequences, worked through in the exclusion guide and the credit guide.

Honesty requires this section, because the relief has edges:

• Income the exclusion cannot touch in a low-tax country. Investment income, rent and gains earned somewhere with little local tax have no credit to offset the US claim, and the exclusion never covers them.
• Earnings above the exclusion cap in a country whose tax rates sit below US rates on the excess.
• US-source income — rent from a US property, US dividends — which the residence country credits, reversing the usual direction.
• Local tax-free wrappers the US does not recognise. A Canadian TFSA is tax-free in Canada and fully taxable to the IRS; local mutual funds can fall into the punitive PFIC regime. The wrapper's local blessing does not travel. See US persons with a TFSA or RESP.
• Self-employment tax — the next section's subject, because it surprises the most people.

Three dates matter, and they do different jobs:

1. The ordinary spring deadline — the same one domestic filers face. This is when any tax owed is due, and interest runs from here regardless of every extension below.
2. The automatic extension for those abroad. Taxpayers whose main home and post of duty are outside the United States get an automatic two-month filing extension — no form required, just a statement with the return. Filing time, not payment time.
3. The standard extension on request, pushing filing into the autumn for those who need it, with a further special extension available to some abroad.

The FBAR runs on its own calendar with its own automatic extension, and because it goes to FinCEN rather than the IRS, extending the return does nothing to it — a separate rail that separate software sometimes forgets.

Sometimes — and it is the part of the system expats most often miss, because it follows different rules entirely. States are not parties to tax treaties, several do not conform to the foreign earned income exclusion, and state liability turns on domicile rather than physical presence.

Leaving the country without severing state domicile — the driver's licence kept current, the voter registration, the house available for your return — can leave a state claiming you for years after you thought you left. California is the canonical example: it does not conform to the exclusion, so foreign salary excluded federally sits fully taxable in a Californian resident's state return, with no foreign tax credit to offset it. Some states have no income tax at all, which is why the last state you were domiciled in matters enormously.

The fix is done at departure, not at filing time: sever the domicile facts deliberately. See state residency and domicile.

The foreign earned income exclusion removes income from income tax. It does not touch self-employment tax — the social security and Medicare levy on self-employment profit. A freelancer abroad can exclude every dollar of profit for income-tax purposes and still owe US self-employment tax on all of it.

What actually fixes this is a totalization agreement — a social security treaty assigning you to one country's system. A self-employed American resident in Canada is assigned to Canada's system under the US–Canada agreement, pays into CPP, and owes no US self-employment tax — evidenced by a certificate of coverage. In a country with no totalization agreement, the US levy stands even alongside mandatory local contributions, a genuine double charge with no credit to bridge it, since social security contributions are not creditable income taxes.

Where you are matters more than what you earn here: see totalization agreements.

The most common expat situation we see is not tax evasion — it is decades of honest ignorance. Moved abroad at twenty-five, built a life, never knew the obligation followed. Or born abroad to an American parent and never told.

The IRS built a route specifically for this: the streamlined foreign offshore procedures. Certify the failure was non-wilful, file a short span of back returns and account reports, and penalties are waived — the offshore penalty for those qualifying abroad is zero. The relief is generous precisely because it is voluntary: it exists for people who come forward, and it closes to anyone the IRS contacts first.

Two things people fear that mostly do not happen: back taxes are usually small or nil, because the same exclusion and credits apply retroactively to the back years; and prosecution is not a realistic risk for non-wilful failure resolved through the procedure. The full route is at streamlined foreign offshore.

Citizenship-based taxation ends only when the citizenship does — or, for long-term green card holders, when the status is formally ended for tax purposes. Renunciation is a real option some long-settled expats take, and it has a tax gate: the expatriation regime.

Anyone meeting one of three tests — net worth of $2,000,000 or more, average annual net income tax above an indexed figure ($206,000 for 2025), or failure to certify five years of tax compliance — is a covered expatriate, treated as having sold worldwide assets the day before expatriating, with an exclusion for a slice of the resulting gain ($890,000 for 2025). The compliance test is the one that catches people of ordinary means: renouncing without five clean years of filings behind you makes you covered regardless of wealth, which is why the sequence is always compliance first, renunciation second. The mechanics are at Form 8854.

"Do expats pay taxes in both countries?" deserves a precise answer, because "both" hides three different things:

• Filing in both countries: usually yes. A resident return where you live, a citizen return to the US.
• Paying something in both: often yes. The residence country taxes your worldwide income as a resident; the US may collect on the slices its relief does not reach.
• Paying twice on the same dollar: rarely, when done right. The credit-and-exclusion machinery exists precisely to prevent it, and the total generally lands near the higher of the two countries' tax — not the sum.

When people genuinely pay twice, the cause is almost always mechanical: relief claimed in the wrong country's return first, a timing mismatch between the two tax years, a wrapper mismatch like the TFSA, or paperwork that never reached a payer. Each is fixable, and most are avoidable, which is why we prepare both returns together rather than optimising one side blind.

1. Confirm the obligation: citizen or green card holder → worldwide filing; neither → US-source only.
2. Pick the relief lead: credit in a high-tax country, exclusion in a low-tax one — modelled, not defaulted, because switching later is restricted.
3. Sweep the balance-based forms: FBAR at the $10,000 aggregate, 8938 at its higher abroad thresholds — owed even in zero-tax years.
4. Check the wrappers: TFSA, RESP, local funds — the local tax blessing does not travel.
5. Check the state: domicile severed, or a state return still owed.
6. Self-employed: totalization certificate, or budget for self-employment tax.
7. Behind: streamlined before the IRS writes first.

The filing obligation has a shadow that reaches expats through their local bank rather than the IRS. Under FATCA, foreign financial institutions identify their US-person account holders and report those accounts — balances included — through their local tax authority or directly. In Canada that flows through the CRA to the IRS under an intergovernmental agreement. Practically, it means three things for an American abroad:

• The self-certification letter is not optional. Banks ask new and existing customers to declare US status. Declaring falsely is a real offence; declining tends to get the account restricted or closed. The letter is also how many accidental Americans first learn they are American for tax purposes.
• The IRS likely already knows about the accounts. Which changes the calculus for anyone behind on filings: the data arrives with or without a return attached. Voluntary compliance through the streamlined route is answering a question the IRS can already see; waiting is being found.
• Some institutions simply refuse US clients. Investment platforms in particular, because FATCA compliance costs more than a retail client earns them. This is inconvenient rather than dangerous, but it shapes where an expat can invest — and pushes people toward local funds that are PFICs, quietly trading a banking problem for a worse tax one.

None of this changes what you owe. It changes what is visible, which for practical purposes is now everything. The reporting mechanics on your own side of the ledger — FBAR and Form 8938 — are compared at FBAR against Form 8938, and what FATCA means for entities at the FATCA page.

If you are current, the question worth asking annually is whether the exclusion-or-credit choice still fits — it shifts with income, country and family. If you are behind, the streamlined window is open until the IRS writes first, and the back years usually cost less than the worry did.

We work only on cross-border and international tax, and we prepare the US and Canadian returns together so the relief lands once and correctly. Fees are fixed and agreed before anything starts, and the first conversation costs nothing.

Contact us — 24-hour helpline +1 (416) 619-0068, or see filing US taxes from Canada.