Treaty · Credit · Exclusion

Double Taxation on Foreign Income

Q: What if my country has no tax treaty with the US?

You still have the foreign tax credit. It lives in the Internal Revenue Code rather than in any treaty and applies to income tax paid to almost any country. Brazil has no US income tax treaty and Brazilian-source income tax is still creditable. What you lose without a treaty is relief at source — nobody reduces the foreign withholding for you.

Q: Is double taxation on dividends the same problem?

Usually not. The phrase is used for two different things. Double taxation most often means the corporate problem — a company pays tax on profit and the shareholder pays again on the dividend — which is a domestic structural issue with its own solutions. This page is about the international problem: one person's income taxed by two countries.

Two countries have taxed the same money. Three mechanisms fix it, they interact, and the order you use them in decides how much you keep.

Every rate on this page is cited to the treaty article that authorises it. Treaty texts last read September 21, 2026.

Quick answer

Three mechanisms relieve the same problem. A treaty reduces the foreign tax before it is taken. The foreign earned income exclusion removes foreign salary from the US tax base. The foreign tax credit gives you back US tax for foreign income tax already paid. The credit is the broadest and needs no treaty — but you cannot exclude income and then credit the tax on the same income.

Key takeaways

The credit is the default. It needs no treaty, reaches nearly every country and nearly every kind of income, and carries forward 10 years.
Relief at source beats relief afterwards. A treaty rate claimed on a W-8BEN is money you never lose, rather than money you reclaim.
You cannot exclude and credit the same dollar. Take the exclusion and the foreign tax on the excluded slice is gone for good.
The savings clause is why a treaty rarely saves a US citizen US tax. Nearly every treaty lets the US tax its own people as if the treaty did not exist.
If the double charge is on social security rather than income tax, none of these work — you need a totalization agreement.

Why it happens at all

Because two countries both have a legitimate claim on the same income, and neither gives it up automatically.

Nearly every country taxes income arising inside its borders. The United States does that and something more: it taxes its citizens and green card holders on worldwide income, wherever they live. Very few countries do this — it is the structural reason Americans abroad have a problem that, say, Germans abroad mostly do not.

So an American teaching in Seoul faces a Korean claim, because the work happened in Korea, and a US claim, because she is a US citizen. Both are correct. Double taxation is the default outcome of two correct claims, which is why the relief has to be claimed actively rather than arriving on its own.

Nonresidents have a different problem

If you are not a US person, the US generally taxes you only on US-source income — so the double charge usually arises at home, and your route is to cut the US withholding at source with a treaty rate rather than to claim a US credit. That is what Form W-8BEN is for, and why 30% is the number to beat.

The three mechanisms

They act at different moments: before the tax is taken, on the income itself, or against the tax afterwards.

Treaty, exclusion and credit compared

	Tax treaty	Foreign earned income exclusion	Foreign tax credit
What it acts on	The foreign tax, before it is withheld	Your US taxable income	Your US tax bill
Covers	Dividends, interest, royalties, pensions, students — by article	Earned income only: salary, professional fees, self-employment	Almost any income with foreign income tax on it
Needs a treaty?	Yes, by definition	No	No
Limit	Whatever the article sets	An inflation-adjusted annual maximum	The section 904 limitation
Claimed on	Form W-8BEN, or Form 8833 with the return	Form 2555	Form 1116, or straight on the return under the $300 election
Unused relief	Nothing to carry — it either applied or it did not	Nothing to carry	Back 1 year, forward 10

The exclusion has two qualifying tests and both are demanding: a bona fide residence test, which needs an uninterrupted period covering an entire tax year, or a physical presence test of at least 330 full days in any twelve consecutive months. It also reaches earned income only — pensions, annuities and Social Security benefits are expressly outside it, as are dividends and interest.

The annual maximum is inflation-adjusted and changes every year. We do not print a figure for the current year here because the IRS page we cite does not publish one we could verify — check the IRS foreign earned income exclusion page for the year you are filing.

Which one applies to your income

Work top to bottom. The earlier the relief acts, the more of your money it saves.

Which relief applies to your income

Is the foreign tax being withheld from a payment you have not received yet?

Cut it at source with the treaty rate before it is taken. A refund you never had to ask for beats a credit you have to claim.

→ Form W-8BEN to the payer

Is it foreign earned income — a salary or self-employment profit from working abroad?

The foreign earned income exclusion may remove it from the US base entirely. But you cannot then credit the foreign tax on the excluded part.

→ Form 2555

Has the foreign income tax already been paid, on anything?

The foreign tax credit. It needs no treaty, covers nearly every country and nearly every kind of income, and carries forward ten years.

→ Form 1116, or straight on the return under the $300 election

Is the double charge on social security rather than income tax?

None of the above. A totalization agreement decides which country's system you pay into, and a certificate of coverage proves it.

→ Certificate of coverage

Read top to bottom: the earlier the relief, the better it is for you. Stopping the tax being withheld beats reclaiming it, and reclaiming it beats carrying an unused credit for ten years. Most people abroad end up using more than one of these in the same year.

The kind of income decides most of it. Salary earned abroad is the one case where all three are potentially in play and you must choose. Portfolio dividends and interest are almost always a treaty-at-source question first and a credit question second. A pension is usually decided by a specific treaty article naming which country may tax it.

The same income, three ways

The mechanisms produce different answers on identical facts, which is why the choice is worth making deliberately.

$20,000 of foreign income, $2,400 of foreign tax paid

Route	What happens	Result
Do nothing	Both countries tax the income in full.	$2,400 abroad plus US tax on the same income.
Foreign tax credit	US tax reduced by the foreign tax, capped by the limitation — here the ceiling is $3,200 and the tax paid is below it.	All $2,400 credited
Exclusion, if it is earned income	The income leaves the US base entirely — but the foreign tax on it stops being creditable.	No US tax on the excluded slice, and no credit for the foreign tax on it.
Treaty at source	The foreign tax is reduced before it is withheld, so there is less to relieve.	Best of all where it is available — nothing to reclaim.

On these figures the credit is clean: the foreign tax is under the ceiling, so all $2,400 comes back and nothing is deferred. Change the foreign rate and the answer changes with it — the limitation is worked at three income levels here.

The one combination that does not work

“You cannot take a credit or a deduction for foreign taxes paid on income you exclude under the foreign earned income exclusion or the foreign housing exclusion.” Excluding income and crediting the tax on it is double relief for one charge, and the statute forbids it. Where your earnings exceed the exclusion, only the tax on the unexcluded part is creditable — and getting that split right is what a preparer is for.

The order to use them in

Stop the tax, then remove the income, then credit what is left. In that order.

First, stop it being withheld. A treaty rate claimed on a W-8BEN before payment costs you nothing and needs no return. Check whether your country has a rate.
Second, consider the exclusion — but only for earned income, and only if you pass one of the two tests. Model it against the credit rather than assuming; in a high-tax country the credit often leaves you better off and builds a carryover as well.
Third, credit the rest. Whatever foreign income tax is left after the first two is a foreign tax credit question, computed on Form 1116.
Then check whether you owe a disclosure. If your position depends on a treaty overriding the Code, Form 8833 may be required — though it is waived for most ordinary cases.

The order matters because the mechanisms are not independent. Deciding on the exclusion first can destroy a credit you would rather have had; claiming a treaty rate at source reduces the foreign tax and therefore the credit you need. Sequence, not just selection.

When it is not income tax at all

Social security contributions, VAT and property taxes are outside all three mechanisms.

Everything above assumes the second charge is an income tax. Where it is not, none of it applies. The foreign tax credit reaches income, war profits and excess profits taxes only; an income tax treaty reduces income tax only.

Social security contributions — relieved by a totalization agreement, if one exists with your country, and by nothing else. The list of countries is different from the treaty list.
VAT, GST and sales tax — not income taxes, not creditable. They may be a deductible business expense, which is a different provision.
Property and wealth taxes — likewise outside the credit.

Indian nationals meet this most often, because India has an income tax treaty and no totalization agreement. nritousa.com covers the India–US position in more depth than we do.

Frequently asked questions

How do I avoid double taxation on foreign income?

Three mechanisms, and most people abroad use more than one. A treaty can reduce or remove the foreign tax before it is withheld. The foreign earned income exclusion removes foreign salary from the US tax base entirely, up to an annual limit. The foreign tax credit refunds you for foreign income tax already paid. The credit is the broadest — it needs no treaty and covers nearly any income — so it is the default answer when the others do not fit.

Why am I taxed twice on foreign income in the first place?

Because two countries both have a claim. The United States taxes its citizens and residents on worldwide income wherever they live — one of very few countries that does — while nearly every other country taxes income arising within its borders. Earn in Berlin as a US citizen and both claims land on the same salary. Nothing about that is a mistake; the relief mechanisms exist precisely because it is the normal result.

Can I use the foreign tax credit and the foreign earned income exclusion together?

In the same year, yes. On the same dollar, no. If you exclude a slice of salary, the foreign tax on that excluded slice is neither creditable nor deductible — you have already had relief for it. Where you earn beyond the exclusion limit, the tax on the unexcluded part is creditable. Using both correctly on a split is the most common source of expensive errors on an expat return.

Does a tax treaty mean I do not pay US tax on foreign income?

Almost never, because of the savings clause. Nearly every US treaty reserves the right to tax its own citizens and residents as though the treaty did not exist, with a short list of exceptions. A US citizen abroad therefore usually cannot use their own country’s treaty to escape US tax — the treaty helps by reducing the foreign side, and the credit does the rest.

What if my country has no tax treaty with the US?

You still have the foreign tax credit, which is the point most worth knowing. It lives in the Internal Revenue Code rather than in any treaty and applies to income tax paid to almost any country. Brazil has no US income tax treaty and Brazilian-source income tax is still creditable. What you lose without a treaty is relief at source — nobody reduces the foreign withholding for you.

Is double taxation on dividends the same problem?

Usually not, and the phrase is used for two different things. “Double taxation” most often means the corporate problem — a company pays tax on profit and the shareholder pays again on the dividend. That is a domestic structural issue with its own solutions. This page is about the internationalproblem: one person’s income taxed by two countries.

Am I double taxed on social security contributions too?

You can be, and none of the three mechanisms on this page fixes it. Social security contributions are not income tax, so the foreign tax credit does not reach them and an income tax treaty does not reduce them. The instrument for that is a separate one — a totalization agreement — and it covers a different list of countries.

What happens to foreign tax I cannot get relief for this year?

If it is creditable, it carries forward up to 10 years and back one, so a year where the limitation blocks the credit is a deferral rather than a loss. If it is not creditable at all — a foreign VAT, or tax on income you excluded — there is nothing to carry, which is why the choice between the mechanisms matters before the year ends rather than after.

Sources

IRS — Foreign earned income exclusion — the bona fide residence and 330-day physical presence tests, and the current annual maximum.
IRS Publication 514 — the bar on crediting tax paid on excluded income.
26 U.S.C. § 904 — the limitation and the carryover.

Choosing between these mechanisms is a planning decision with consequences that outlast the year, and this page explains them rather than advising on yours. Start with the federal tax calculator and take the comparison to a preparer who handles foreign income.

Foreign Tax Credit

The relief that works when no treaty does — credit against deduction

Form 1116

The limitation calculation, the categories, and who can skip the form entirely

Tax Treaty Benefits & Country Lookup

Free tool: is there a treaty with your country, what rate, and which form claims it

Totalization Agreements

Social security, the second treaty network, and why it covers different countries

Form 8833

When you must disclose a treaty position, and what to write on each line

Educational information, not tax advice

Every rate and article on this page is cited to the treaty text it comes from, so you or your accountant can check it. Treaty provisions turn on facts we do not know about you — residency, beneficial ownership, limitation-on-benefits conditions and the savings clause can all change the answer. Read the article before you rely on the number, and take advice on anything material.