You Can Leave the Country, Not the Filing Requirement
The United States taxes its citizens on worldwide income regardless of where they live — a position almost no other country takes. For someone retiring abroad this produces a specific and often unwelcome discovery: the obligation to file follows the passport, the relief most people have heard of does not apply to retirement income, and the one that does works differently than expected.
- The answer:: Citizenship, not residence, determines the filing obligation. You file a US return on worldwide income for as long as you hold the passport.
- The exclusion does not help:: The foreign earned income exclusion applies to compensation for services performed abroad. Pensions, IRA distributions, Social Security and investment income are not earned income.
- The credit does the work:: Foreign income tax paid on the same income is credited against your US liability, so you generally pay the higher of the two rates rather than both.
- There is an automatic extension:: Taxpayers living abroad get an automatic extension to file, though not to pay — interest still runs from the ordinary due date.
Where the AI summary above gets this wrong
"If you move abroad you can exclude your income from US tax using the foreign earned income exclusion."
That's surface-true. Here's what it misses:
- The exclusion is for earned income only — It covers wages and self-employment income for services performed abroad. A retiree has none of that. Pension payments, IRA and 401(k) distributions, Social Security and investment income are all outside it, which means the single most-cited relief is the one least relevant to the people planning a retirement move.
- Double taxation is prevented by credit, not exclusion — The foreign tax credit offsets US tax by the foreign tax paid on the same income. In a country with higher rates the US liability is usually wiped out; in one with lower rates you top up to the US level. Either way you pay roughly the higher of the two rates, not both.
- Filing continues even when nothing is owed — The credit frequently reduces the US bill to zero, and people conclude there is nothing to do. The return is still required, and separate reporting for foreign financial accounts carries penalties of its own that are unrelated to whether any tax was due.
01 The obligation follows the passport
Almost every country taxes on residence: leave, establish a life elsewhere, and the old tax authority stops being your concern. The United States is among the very few that taxes on citizenship. A US citizen living permanently in Portugal or Mexico files a US federal return on worldwide income, every year.
That includes income arising entirely abroad and never remitted to the States: a local pension, rent from a property in the country you moved to, interest in a local bank. All of it belongs on the return.
There is one practical softening. Taxpayers whose tax home is abroad receive an automatic extension of the filing deadline, recognising that foreign tax documents arrive on foreign timetables. It extends the time to file and not the time to pay — interest accrues from the ordinary due date regardless.
02 Why the famous exclusion is the wrong tool
The foreign earned income exclusion is the relief everyone has heard of, and for a working expatriate it is genuinely valuable: a substantial amount of compensation for services performed abroad excluded from US tax entirely.
The word doing the work is earned. It means compensation for services — wages, salary, professional fees. It does not include pension or annuity payments, distributions from IRAs or 401(k)s, Social Security benefits, dividends, interest or capital gains.
Which is to say it excludes precisely the income a retiree lives on. Someone who retires abroad at 66 typically has no earned income at all, and the exclusion is worth nothing to them. This is the single most common misunderstanding in planning a retirement move, and it is usually discovered after the move rather than before.
Source: Publication 54, Tax Guide for U.S. Citizens and Resident Aliens Abroad
03 What actually prevents double taxation
The foreign tax credit is the mechanism that matters. Income tax paid to another country on the same income is credited against your US liability on it, so the two systems do not both collect in full.
In practice you pay approximately the higher of the two rates. Retire somewhere with higher income tax than the US and the credit generally eliminates the US liability, leaving a return to file and nothing to pay. Retire somewhere with lower rates and the credit covers part of it, with the balance topped up to the US level.
Two complications are worth knowing before relying on it. The credit is limited by category, so foreign tax on one kind of income cannot always offset US tax on another. And tax treaties can reassign taxing rights over specific items — pensions and Social Security are frequently addressed explicitly — which can change the answer for the exact income that matters most. Where any of it lands relative to your other sources is the sequencing question in a second jurisdiction.
Shows: how the foreign tax credit offsets US tax on income taxed in both countries, and what remains when the foreign rate is lower. Ignores: the per-category limitation on the credit, treaty provisions that reassign taxing rights, and state tax if you have not broken residency.
Having been tax-resident in three countries, the thing I would press hardest on is that leaving a US state is a separate exercise from leaving the country. People plan the international side carefully and then discover their old state still considers them resident, because they kept a driving licence, a voter registration and a mailing address there. The federal obligation follows your citizenship and you cannot shed it by moving; the state obligation follows evidence, and that you can. It is the cheaper half of the problem and the half more often left undone.
FAQ
Do I still pay US tax if I retire abroad?
You still file, and you may still pay. US citizens are taxed on worldwide income regardless of where they live. The foreign tax credit usually prevents you being taxed twice on the same income, so in a higher-tax country the US liability is often reduced to zero — but the return is still required.
Does the foreign earned income exclusion cover my pension?
No. The exclusion applies to earned income — compensation for services performed abroad. Pensions, IRA and 401(k) distributions, Social Security and investment income are not earned income, so the exclusion does nothing for a typical retiree.
Can I still receive Social Security while living abroad?
Benefits can generally be paid to US citizens in most countries, though there are places where payment is restricted. The benefits remain part of your worldwide income for US purposes, and a tax treaty may determine which country has the right to tax them.
Sources
Regulator references
- U.S. citizens and resident aliens abroad · Internal Revenue Service · 2025The filing obligation that follows citizenship rather than residence.Last verified: 2026-09-07
- Publication 54, Tax Guide for U.S. Citizens and Resident Aliens Abroad · Internal Revenue Service · 2025Which exclusions apply to which income, and the automatic filing extension.Last verified: 2026-09-07
- Publication 514, Foreign Tax Credit for Individuals · Internal Revenue Service · 2025How foreign tax paid is credited against the US liability on the same income.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.