Income and Assets · Income

Tax treatment of a U.S. citizen or resident with foreign income

Verification 2026 Verified
tax year · reviewed 2026-08-19 · Draft for I. Ohu review

A United States citizen or resident is taxed on income from everywhere. All citizens, wherever resident, and all resident aliens are liable to the income taxes imposed by the Code whether the income is received from sources within or without the United States (Reg. § 1.1-1(b)). Relief from the double taxation that follows comes in three forms — an exclusion, a credit, and a treaty — and the practical work is not knowing them individually but knowing how they interfere with each other.

The rule

The exclusion is elective, and it is two elections. At the election of a qualified individual, made separately for each, foreign earned income and the housing cost amount are excluded from gross income (IRC § 911(a)(1), (2)). A qualified individual is one whose tax home is in a foreign country and who is either a citizen who has been a bona fide resident of a foreign country for an uninterrupted period including an entire taxable year (IRC § 911(d)(1)(A)), or a citizen or resident present in foreign countries for at least 330 full days in any 12 consecutive months (IRC § 911(d)(1)(B)). Note the asymmetry: the bona fide residence route is open to citizens only, the physical presence route to residents as well.

The exclusion is not free. No deduction, exclusion or credit — expressly including any credit or deduction for foreign taxes — is allowed to the extent it is properly allocable to or chargeable against amounts excluded under § 911(a) (IRC § 911(d)(6)). So excluding income also excludes the foreign tax paid on it from the credit. That is the single most important interaction in this topic.

The credit is capped by a ratio. Foreign taxes are allowed as a credit against the tax imposed by chapter 1 to the extent § 901 provides (IRC § 27), and the credit cannot exceed the same proportion of the tax as foreign-source taxable income bears to entire taxable income (IRC § 904(a)). Excess taxes are deemed paid in the first preceding taxable year and then in the first ten succeeding years, in that order (IRC § 904(c)).

A small-credit election avoids the limitation and the paperwork. Where the whole of an individual’s foreign-source gross income is qualified passive income and creditable foreign taxes are within a small threshold, the individual may elect to disapply the § 904(a) limitation (IRC § 904(j)(1)(A), (j)(2)). The price is stated in the same paragraph: no carryback or carryover of that year’s taxes in either direction (IRC § 904(j)(1)(B), (C)).

Credit or deduction, not both. No deduction is allowed for foreign income taxes if the taxpayer chooses to take to any extent the benefits of § 901 (IRC § 275(a)(4)). The choice is annual and it is all-or-nothing for the year.

Treaties do not automatically win, and relying on one must be disclosed. For determining the relationship between a treaty provision and a revenue law, neither has preferential status by reason of being a treaty or a law (IRC § 7852(d)(1)) — the later in time prevails. A taxpayer taking the position that a treaty overrules or modifies an internal revenue law must disclose that position on the return (IRC § 6114(a)), and failure carries a per-failure penalty, waivable for reasonable cause (IRC § 6712(a), (b)).

Current figures

Item	2026
Foreign earned income exclusion	$132,900 of foreign earned income^TY2026
Housing cost amount	housing expenses above 16 percent of the exclusion amount, capped at 30 percent of it, both computed on a daily basis over the qualifying period^TY2026
Qualification for the exclusion	a tax home in a foreign country, plus either bona fide residence in a foreign country for an uninterrupted period including an entire taxable year — open to citizens only — or physical presence in foreign countries for at least 330 full days in any 12 consecutive months, open to citizens and residents alike^TY2026
Excess credit carryback and carryover	one year back and ten years forward, in that order, usable only as a credit and never as a deduction, and only for a year in which the taxpayer elects the credit (IRC § 904(c))^TY2026
Small-credit election	creditable foreign taxes of $300, or $600 on a joint return, where all foreign source gross income is qualified passive income shown on a payee statement — the taxpayer elects out of the § 904(a) limitation entirely, and forfeits any carryback or carryover for that year (IRC § 904(j))^TY2026
Treaty disclosure penalty	$1,000 for each failure to disclose a treaty-based return position, or $10,000 for a C corporation, waivable for reasonable cause^TY2026

How it works in practice

Establish the reporting position before the relief position. Everything is reportable; the questions that follow are about how much tax survives. Clients who have paid substantial foreign tax often believe they have nothing to file, and the § 6114 disclosure requirement means the belief can cost money even where the tax is nil.

Then choose between the exclusion and the credit rather than assuming the exclusion. Because § 911(d)(6) strips the foreign tax attributable to excluded income out of the credit, a client in a high-tax country is frequently better off taking no exclusion at all and crediting the whole foreign tax — the credit then shelters not just the earned income but investment income too, and any excess carries under § 904(c). In a low-tax or no-tax country the exclusion usually wins. It is an arithmetic comparison, run both ways, not a preference.

Watch the election’s stickiness. A § 911 election, once made, continues until revoked, and a revocation has consequences for re-electing — so the decision is not purely about the current year, and a client who elected in a low-tax posting carries that election into a high-tax one.

For the credit, the § 904(a) ratio is what makes a full credit unusual. A client whose foreign income is a small share of total income has a small limitation, and the unused tax goes to the carryback and carryover rather than being lost — worth saying, because the client sees only that the credit was smaller than the tax paid. Where the facts are small and passive, the § 904(j) election trades that carryover for simplicity, which is a real trade rather than a free one.

The exclusion that cost more than it saved

Amara is a citizen working in a country with a high income tax. Her salary is $190,000, on which she paid $61,000 of foreign tax. She also has $40,000 of foreign investment income.

If she excludes the maximum foreign earned income, the foreign tax attributable to the excluded portion is barred from the credit by IRC § 911(d)(6) — it is properly allocable to amounts excluded under § 911(a). She shelters the excluded salary but loses most of the credit, and the tax on her remaining salary and her investment income has little to offset it.

If instead she makes no § 911 election, the whole $61,000 is creditable, subject to the § 904(a) proportion. On these facts the credit is likely to exceed her United States tax on the foreign income entirely, with the excess carrying back one year and forward ten under § 904(c). The exclusion is the worse answer, and the only way to know is to compute both.

Two hundred and fourteen days is not three hundred and thirty

Tomas, a citizen, moved abroad on 1 June and returned the following 1 January. His tax home was abroad throughout and his employer told him he qualified for the exclusion.

He does not, on either route. IRC § 911(d)(1)(A) requires bona fide residence for an uninterrupted period that includes an entire taxable year, and his stay spans parts of two calendar years without covering either in full. IRC § 911(d)(1)(B) requires at least 330 full days in a 12-consecutive-month period, and 1 June to 1 January is about 214.

Change one fact and the answer flips: had he stayed to the following 1 August, a 12-month window containing 330 full days would exist, and the exclusion would be available on a pro-rata basis for each tax year. The test is days in a window, not calendar years, so the window may straddle two returns.

The small credit and the simple election

Priya has $2,300 of foreign dividend and interest income from a European fund, with $210 of foreign tax withheld. Her only other income is a domestic salary.

She may elect under IRC § 904(j) to disapply the § 904(a) limitation: her entire foreign-source gross income is qualified passive income and the creditable tax is within the threshold. That takes the limitation computation out of her return entirely.

The price is in § 904(j)(1)(B) and (C): no part of this year’s tax may be carried to another year, and no tax from another year may be carried into this one. On $210 that is a sensible trade. On facts where the foreign tax is close to the ceiling and her limitation would otherwise leave an excess worth carrying, it would not be — and the election is made year by year, so it should be re-decided each time.

Traps

Everything is reportable. Reg. § 1.1-1(b) reaches citizens wherever resident and resident aliens, on income from within or without the United States.
The exclusion bars the credit on the same income (IRC § 911(d)(6)) — the interaction that most often makes the exclusion the wrong choice.
Bona fide residence is for citizens only; physical presence is open to citizens and residents (IRC § 911(d)(1)(A), (B)).
Bona fide residence needs an entire taxable year, not any twelve months.
Physical presence counts full days in any 12 consecutive months, so the window can straddle two returns.
Foreign earned income means earned. Investment income, pensions and most passive receipts are outside § 911 however foreign they are.
Credit or deduction, not both (IRC § 275(a)(4)) — and taking § 901 benefits “to any extent” forecloses the deduction for the year.
The credit is capped by a ratio, not by the tax paid (IRC § 904(a)); the excess carries under § 904(c) rather than disappearing.
The § 904(j) election forfeits carryovers in both directions (IRC § 904(j)(1)(B), (C)).
A treaty does not automatically prevail (IRC § 7852(d)(1)), and relying on one is a disclosable position (IRC § 6114(a)) with its own penalty (IRC § 6712).

How this has changed

The framework here is stable, and the annual movement is confined to the § 911 amounts: the exclusion figure is adjusted each year under § 911(b)(2)(D)(ii), and the housing floor and ceiling move with it because both are computed from it on a daily basis.

The structural point worth watching is not a change but a persistent asymmetry. The § 911 amounts are indexed. The § 904(j) threshold is not — it is fixed in the statute and has never been adjusted, so the number of taxpayers who can use the simplification shrinks every year in real terms. The same is true of the § 6712 penalty. When reading older material, the § 911 figures will be stale and the § 904(j) and § 6712 figures will not, which is the reverse of the instinct that older numbers are the suspect ones.

One reading caution specific to this topic: treaty positions turn on the particular treaty, and a treaty that has been renegotiated changes the answer without any change to the Code. Reg. § 1.1-1(b) and §§ 901 and 904 will be the same next year; the article a client relies on may not be. Where a position depends on a treaty, the treaty text and its protocols are the source, not a summary of them — and § 6114 requires the position to be disclosed either way.

Exam focus

The most examinable single point is § 911(d)(6): electing the exclusion forfeits the credit for foreign tax allocable to the excluded income. Expect a question that presents both reliefs and asks which is better, or asks what the exclusion costs.

Know the two qualification routes exactly, including that bona fide residence is limited to citizens and requires an entire taxable year, and that physical presence needs 330 full days in any 12 consecutive months.

Know that the credit is limited by the § 904(a) ratio, that the excess carries back one and forward ten, and that the § 904(j) election buys simplicity at the cost of both carryovers.

Know that a treaty has no automatic priority under § 7852(d)(1) and that a treaty-based position must be disclosed under § 6114, on pain of the § 6712 penalty.

Check yourself

1. A citizen abroad excludes the maximum foreign earned income and also claims a credit for all the foreign tax paid on her salary. What is wrong?

Answer: the credit. IRC § 911(d)(6) denies any deduction, exclusion or credit — expressly including a credit for foreign taxes — to the extent it is properly allocable to or chargeable against amounts excluded under § 911(a). The foreign tax attributable to the excluded salary is therefore not creditable. Only tax on income actually included may be credited.

2. A resident alien is present in foreign countries for 340 full days across a 12-month period straddling two tax years. Can she use the foreign earned income exclusion?

Answer: yes, by the physical presence route. IRC § 911(d)(1)(B) applies to a citizen or resident of the United States present in a foreign country or countries for at least 330 full days in any period of 12 consecutive months, and the period need not align with a taxable year. She could not use the bona fide residence route in § 911(d)(1)(A), which is open to citizens only.

3. A taxpayer pays $9,000 of foreign tax but the IRC § 904(a) limitation allows a credit of only $5,500. What happens to the balance?

Answer: it carries. IRC § 904(c) deems the excess paid in the first preceding taxable year and then in any of the first ten succeeding taxable years, in that order, to the extent the limitation in that year exceeds the foreign taxes for it. The $3,500 is not lost, though it is only usable to the extent a carryback or carryover year has spare limitation.

4. A client wants to take a treaty position reducing United States tax on a foreign pension, and asks whether disclosure is necessary given that no tax will be due.

Answer: yes. IRC § 6114(a) requires disclosure by each taxpayer who takes the position that a treaty overrules or otherwise modifies an internal revenue law, on the return or, if none is required, in the form prescribed. The absence of tax is not an exception. IRC § 6712(a) imposes a penalty for each failure, which the Secretary may waive for reasonable cause under § 6712(b).

Change log

2026-08-19Initial draft. Sets out the IRC § 911(d)(1) qualification tests, the IRC § 904(a) limitation with its carryback and carryover and the IRC § 904(j) de minimis election, and the IRC § 6114 disclosure requirement with its IRC § 6712 penalty.