The Foreign Earned Income Exclusion, explained

The foreign earned income exclusion lets a US taxpayer living abroad keep a substantial part of their foreign earnings out of the US federal income tax base — for 2026, up to $132,900. It is the largest single concession available to Americans working overseas, and it is claimed by rather more people than strictly qualify for it.

The reason is that the exclusion is not a status you acquire by moving abroad. It is a claim you must earn each year under one of two tests, and one of those tests is a day count with several traps in it that ordinary intuition does not catch.

What the exclusion covers, and what it does not

Three conditions must hold together. Your tax home must be in a foreign country — broadly, the place of your regular or principal work, not merely where you keep a flat. You must have foreign earned income, meaning wages, salary or professional fees for services actually performed outside the United States. And you must satisfy either the bona fide residence test or the physical presence test.

What falls outside the exclusion catches people out more often than the tests do:

• Passive income. Dividends, interest, capital gains, rents and royalties are not earned income, wherever they arise.
• Pensions and social security, including foreign ones.
• Pay from the US government to its own employees, however far from Washington the work is done.
• Income earned in the United States, even during a short work trip, because the services were not performed abroad.

Two further limits matter at the margin. The exclusion removes income from the base but not from the rate calculation: under the stacking rule, whatever income remains is taxed at the rates that would have applied had the excluded amount still been in the return. And self-employment tax is untouched — the exclusion is an income tax provision, and SECA is computed on gross net earnings regardless.

The two tests, side by side

	Physical presence	Bona fide residence
Nature of the test	Arithmetic — a count of full days abroad	Qualitative — was your residence genuine?
Period measured	Any 12 consecutive months, chosen by you	An uninterrupted period including a whole tax year
Who may use it	Anyone eligible for the exclusion	US citizens; resident aliens who are treaty-country nationals
Available in the year you move	Yes	No
Effect of travel	Every non-qualifying day erodes the count	Tolerated, if you intend to return
Decided by	You, from a ledger	The IRS, on facts and circumstances

Nothing obliges you to use the same test two years running, and many people should not: physical presence for the year of the move, bona fide residence once a complete tax year abroad is behind them.

The physical presence test

You qualify if you were physically present in a foreign country or countries for at least 330 full days during any period of 12 consecutive months.

Three features of that sentence do the work.

A full day is a full day. It runs midnight to midnight, and you must have been in a foreign country for the whole of it. This is the opposite convention to the Substantial Presence Test, where any part of a day in the United States counts as a whole one. Under the exclusion, a part-day abroad counts as nothing.

The window is twelve calendar months, not a year of days, and you choose where it begins. It need not start on 1 January or on the first of any month. A window running from, say, 12 May to 11 May is perfectly valid, and choosing it well is often the difference between qualifying and not.

The margin is thinner than it sounds. A twelve-month window contains three hundred and sixty-five days; the threshold leaves you roughly five weeks of everything else — home leave, conferences in the United States, sea crossings, and the arrival and departure days that a move consumes. People plan around the trips they intend to take and are undone by the ones the calendar takes from them.

If your qualifying period covers only part of a tax year, the exclusion is pro-rated to the qualifying days falling within that year. Qualifying in principle does not mean the full figure in practice.

The bona fide residence test

The alternative route asks a different kind of question: not how many days, but whether you genuinely settled. You qualify if you were a bona fide resident of a foreign country for an uninterrupted period that includes an entire tax year, which for a calendar-year filer means a complete 1 January to 31 December. Brief trips back to the United States do not break it.

Because it is judged on facts rather than counted, it is at once more forgiving of travel and less predictable. The full treatment is in the bona fide residence test, explained.

The foreign housing exclusion

Sitting alongside the income exclusion, and frequently forgotten, is the foreign housing exclusion. It covers reasonable housing expenses — rent, utilities other than telephone, insurance, residential parking — above a base amount, on the theory that a certain level of housing cost is already reflected in the main exclusion.

For 2026 the base amount is $21,264, and expenses are generally capped at $39,870 before the base is subtracted. The IRS publishes higher caps for expensive cities, and the list is long enough that anyone in Hong Kong, Singapore, Geneva, London or Dubai should check it rather than assume the standard figure.

Two mechanical points. The housing exclusion is computed after the income exclusion and is limited to foreign earned income not already excluded, so it does not stack indefinitely. And it is pro-rated by the same qualifying-day fraction as the income exclusion — the day count reaches into this figure too.

Exclusion or foreign tax credit

The exclusion is not automatically the better answer. It competes with the foreign tax credit, and the two suit different situations.

The foreign tax credit generally wins where local tax rates meet or exceed US rates. Most of western Europe qualifies. The credit typically extinguishes the US liability on its own, leaves excess credits to carry forward for a decade, and — unlike the exclusion — does not disqualify the income from supporting a contribution to a US retirement account.

The exclusion generally wins in low-tax or no-tax jurisdictions, where there is little or no foreign tax to credit in the first place.

You may use both in the same return, but never on the same dollar: income excluded under §911 cannot also generate a creditable foreign tax. Note too that revoking the exclusion is consequential — having revoked it, you cannot claim it again for five tax years without the consent of the IRS. Switching to the credit is a decision to make deliberately, not a year-by-year optimisation.

Form 2555 in practice

The exclusion is claimed on Form 2555, filed with your return. Four things about it are worth knowing before you start.

The form asks which test you are relying on and will not let you hedge. It asks you to state your tax home and the date it was established. It requires a travel schedule: for the physical presence test, every arrival in and departure from the United States within your chosen window, with dates. And the exclusion is only available on a timely filed return, including extensions — Form 2350 exists precisely so that someone who has not yet accumulated enough qualifying days can extend until they have.

The travel schedule is where reconstructed records fail. It is asked for in dates, not in summaries, and it is the part of the claim that an examiner can check against your passport.

Where the day count actually bites

Three categories of day cost people their claim, and they are not the obvious ones.

Travel days between the United States and anywhere. The day you leave the United States is not a full day abroad, because part of it was spent in the United States. Nor is the day you arrive back. A one-week trip home costs nine days, not seven, and a claim built on the assumption that it costs seven is short before it starts.

Days in or over international waters. This is the trap almost nothing published gets right, and it deserves stating plainly: a day spent in or over international waters is not a foreign day, even though no US presence is involved at all.

The logic follows from the statute rather than from any sense of fairness. §911 requires presence in a foreign country, and a foreign country means territory under the sovereignty of a government other than the United States, together with its territorial waters and the airspace above them. The high seas are under no country’s sovereignty. Time there is therefore neither US presence nor foreign presence — it is simply not presence in a foreign country, and a day it touches cannot be a full day abroad.

The practical consequences are unintuitive:

• A transatlantic repositioning cruise between two foreign ports costs you every day of the crossing, though you never come within sight of the United States.
• An overnight ferry that stays within territorial waters is fine; the same route swinging into open sea is not.
• A flight between two foreign countries whose path stays over land and territorial waters preserves the day. A long-haul flight crossing open ocean does not necessarily do so, and where the aircraft was at midnight can decide the day.
• A US airport connection between two foreign points destroys the day outright. The under-24-hour transit relief that people remember belongs to the Substantial Presence Test; it has no equivalent here, because this test asks for a whole day in a foreign country and you did not have one.

None of this appears on a boarding pass, which is why it is so often discovered afterwards. A sabbatical spent sailing, a cruise-heavy year, or a habit of connecting through Miami between Latin America and Europe can each quietly remove a fortnight from a count that had no fortnight to spare.

Partial days at the ends of a move. The day you first arrive in your new country is rarely a full day, because you were in the air or in a US airport for part of it. Counting it is the commonest single error in a self-prepared Form 2555.

What Residay tracks for this

The exclusion turns on a record, and a record is either kept as you go or reconstructed under pressure.

Residay holds each day against the country it belongs to and applies the midnight-to-midnight convention this test requires rather than the part-day convention the Substantial Presence Test uses — the two counts run side by side without contaminating each other. It labels days in or over international waters explicitly, so a crossing is recorded as what it is rather than inferred from the ports at either end. It sweeps every candidate twelve-month window rather than assuming the calendar year, and reports the best one, because the window is yours to choose and the arithmetic rarely favours January. And it keeps the arrival and departure dates that Form 2555 asks for in the form the form asks for them, exportable for a preparer, on your device rather than on ours.

Planning notes

• Choose the window before you book, not after you file. Moving the start of the twelve months by a fortnight can rescue a count that a calendar year fails.
• Treat every sea crossing and every US connection as a lost day until you have checked otherwise. The count you carry in your head is almost always the optimistic one.
• If you live somewhere with substantial local taxes, model the foreign tax credit before assuming the exclusion. The revocation rule makes this an expensive decision to reverse.
• Extend rather than file early if you are short of qualifying days at the deadline. Form 2350 is designed for exactly that, and a premature return is the harder thing to fix.