US-Turkey Double Taxation: How Americans Are Taxed on Turkish Income

US-Turkey double taxation is real, and the double tax treaty between Turkey and the US does not switch it off. If you are American and you earn money in Türkiye (Turkey), or you live here and still hold a US passport or green card, you are inside two tax systems at once. The treaty does a great deal of useful work: it decides which country may tax which kind of income, it caps Turkish withholding on dividends, interest and royalties, and it obliges each side to credit the other's tax. What it does not do is release you from the United States. A saving clause in Article 1 keeps US citizens taxable at home no matter where they live, which is why relief here comes as a credit rather than an exemption, and why the credit stands or falls on documents. This guide explains, from the Turkish side, when Türkiye treats you as taxable, what the treaty allocates, how the two credits work, and where it gives you nothing at all.

Does the US-Turkey double tax treaty stop you being taxed twice?

No — the US-Turkey double tax treaty does not stop you being taxed twice on its own, and not in the way most people expect. The instrument is the Agreement between the Government of the United States of America and the Government of the Republic of Turkey for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with respect to Taxes on Income. It was signed at Washington in March 1996, approved on the Turkish side by Law No. 4312 (Official Gazette of 14 December 1997, No. 23200), and under its Article 28 it has had effect since 1 January 1998. It does real work, mostly through tie-breakers and capped rates.

What it does not do is switch off the Internal Revenue Service. Article 1, paragraph 3 of the Agreement — the provision American tax advisers call the saving clause — lets the United States tax its citizens by reason of citizenship "as if the Agreement had not come into effect." So the treaty is not a shield. It is a set of tie-breakers and credits, and the credits only reach as far as the paperwork behind them.

This guide is written from the Turkish side of the table. It sets out how Türkiye (Turkey) decides whether you are taxable here, what the treaty allocates and what it caps, how the two credit systems work, and where the treaty gives you nothing at all. The US half of your return belongs to a US tax adviser, and nothing below replaces one.

Why do Americans face a problem most other foreigners do not?

Almost every country in the world taxes people because they live there. The United States is one of the very few that also taxes people because of what is written on their passport. A US citizen or green-card holder files a US return on worldwide income whether they are in Ohio, Izmir or nowhere in particular. A German engineer who moves to Istanbul generally stops being taxable in Germany on Turkish earnings. An American who makes the same move does not stop being taxable in the United States.

Türkiye, for its part, taxes on the ordinary basis. Article 3 of the Income Tax Law No. 193 makes people who are "settled in Türkiye" taxable on the whole of the income they earn inside and outside the country. Put the two systems side by side and the overlap is obvious.

An American living and working in Türkiye is therefore routinely inside both nets on the same money. That is the situation the treaty was built for, and the reason relief comes as a credit rather than an exemption.

Are you a tax resident of Türkiye, the US, or both?

Quite possibly both, and that is the conflict this section is about. Article 4 of Law No. 193 gives two Turkish tests, and either one is enough. You are settled in Türkiye if your domicile (ikametgâh) is here, in the sense the Civil Code gives that word, or if you stay in Türkiye continuously for more than six months within one calendar year. The Article adds a line that catches people out: temporary departures do not break the six-month count. A weekend in Athens or two weeks home for Thanksgiving does not reset the clock.

Article 5 then carves out two groups. First, people here for a defined and temporary purpose: a specific assignment or job, plus students, patients, and people here to rest or travel. Second, people held here by circumstances outside their control, such as illness or detention. Neither group is treated as settled even if the six months pass. An American posted to Türkiye on a defined, temporary corporate assignment may fall within that carve-out, but it turns on the facts of the posting rather than on the label put on it. The tests are set out in full in our guide to tax residency for foreigners in Türkiye.

What does the saving clause actually do?

Article 1(3) is short and blunt. Notwithstanding anything else in the Agreement except paragraph 4, a Contracting State may tax its residents as determined under Article 4, and — in the case of the United States — may tax its citizens by reason of citizenship, as if the Agreement had never come into effect. The paragraph also reaches former citizens for ten years after loss of citizenship, where avoiding tax was one of the principal purposes of giving it up.

Read that carefully, because it cuts in two directions. The citizenship arm belongs to the United States alone. The residence arm belongs to both countries. So if the Article 4 tie-breaker lands you in Türkiye, Türkiye may tax you as though the treaty did not exist, and the United States may tax you as a citizen as though the treaty did not exist. Most of the allocation rules you were counting on stop protecting you against your own two governments: the rule saying a pension is taxable only where you live, the rule saying employment income follows the workplace.

Paragraph 4 lists the benefits the saving clause cannot touch. The list is short:

The practical lesson is that Americans should stop looking for an exemption article and start looking at Article 23.

How do you avoid double tax on Turkish income?

Through a credit, on both sides. Article 23 makes each country give a credit rather than an exemption, and each country runs that credit under its own domestic rules.

Under Article 23(1), the United States allows a resident or citizen a credit against US income tax for income tax paid to Türkiye. The Article also contains an indirect credit for a US company owning at least 10 percent of the voting stock of a Turkish company paying it dividends, covering the Turkish tax on the underlying profits. Read the opening words of that paragraph carefully, though: the whole of Article 23(1) applies only "in accordance with the provisions and subject to the limitations of the law of the United States (as it may be amended from time to time)". What the Article promises and what current US law delivers are two different questions, and the second one is for your US adviser rather than an assumption to build a structure on.

Under Article 23(2), where a resident of Türkiye derives income that may be taxed in the United States under the Agreement, Türkiye allows a deduction from Turkish tax equal to the income tax paid in the United States. That deduction is capped at the part of the Turkish tax appropriate to that income. The cap is not a treaty invention; it is exactly how the Turkish domestic credit already works.

Two points deserve emphasis. First, the credit is capped, and for individuals it does not carry across years. If one country taxes an item more lightly than the other, part of the foreign tax simply disappears. Second, the consular certification requirement is a condition of the credit, not a formality: Article 33(6) says in terms that unless payment abroad is evidenced by certified documents, the foreign tax cannot be deducted from the tax assessed in Türkiye. Start collecting the documents while the foreign tax year is still open.

How does re-sourcing make the US foreign tax credit work?

This is the piece that most often gets missed, and it is the reason an American in Türkiye is not simply taxed flat twice.

A US foreign tax credit only relieves tax on foreign-source income. Suppose you are an American living in Istanbul, drawing a private pension from a former US employer. Treaty Article 18(1) says such a pension is taxable only where you are resident, which is Türkiye. The saving clause overrides that, so the United States taxes it too. But the income is US-source, so on the face of it there is no foreign income for a US credit to attach to.

Article 23(3) closes that gap. For the purposes of relief under the Article, income derived by a resident of one country which may be taxed in the other in accordance with the Agreement — other than solely by reason of citizenship under Article 1(3) — is deemed to arise in that other country. The Turkish tax on that pension therefore has foreign-source income to sit against on the US return.

What does the treaty cap on Turkish withholding?

Under the US-Turkey treaty, Türkiye may withhold no more than 20% on dividends (15% where the recipient is a company owning at least 10% of the voting stock), 15% on interest (10% on loans from a financial institution), and 10% on royalties (5% on equipment rental). These are ceilings on what Türkiye may charge at source; where Turkish domestic law charges less, the domestic rate applies. They matter most to an American investor or company earning Turkish-source income without living here.

The remaining work is done by three allocation rules. Income from immovable property may be taxed where the property sits (Art. 6), and so may gains on disposing of it (Art. 13), which is why an American selling a Turkish flat meets Turkish tax first and looks to the credit second; see our note on buying property in Türkiye as an American. Employment income is taxable where the work is done, unless you are present for no more than 183 days in any continuous twelve months, your employer is not resident here, and the pay is not borne by a Turkish permanent establishment (Art. 15). And business profits are taxable here only if you have a permanent establishment — the threshold we unpack in our guide to permanent establishment and tax residency in Türkiye. Companies claiming these benefits should also read Article 22, the limitation-on-benefits provision, which withholds relief from entities that are not genuinely owned in one of the two countries.

For how Turkish withholding operates mechanically, and what the payer has to do at the moment of payment, see our guide to withholding tax on payments to non-residents.

Is there a US-Turkey social security totalization agreement?

There is not, and that is the gap which surprises Americans most. It is written into the treaty itself: Article 2 lists the taxes covered, and on the US side it names the federal income taxes imposed by the Internal Revenue Code while expressly excluding social security taxes. Whatever the treaty does for your income tax, it does nothing for social security contributions on either side.

Nor is the gap filled elsewhere. Türkiye has bilateral social security agreements with a substantial list of countries, and the United States has totalization agreements with a comparable list, but there is no such agreement between these two. So an American who is self-employed in Türkiye can face Turkish social security obligations and US self-employment tax on the same earnings, with no treaty credit bridging them and no aggregation of the two contribution records for pension purposes. Anyone in that position should take specific advice on both systems before settling a structure, since the answer often turns on whether you work through a Turkish company or as an individual.

One thing the treaty does settle is the taxation of social security benefits. Under Article 18(2), payments made by one country under its social security legislation to a resident of the other country, or to a US citizen, are taxable only in the country making the payment. Because Article 1(4) shelters Article 18(2) from the saving clause, this one holds up. A US Social Security benefit paid to someone living in Türkiye stays taxable in the United States; a Turkish social security pension paid to someone in the United States stays taxable in Türkiye.

What paperwork and deadlines decide whether relief lands?

Treaty relief in Türkiye is claimed, not granted automatically. In practice it comes down to this.

• The residence certificate. For a Turkish payer to apply a treaty cap rather than the full domestic withholding rate, the recipient generally has to produce a certificate of residence (mukimlik belgesi) issued by the other country's tax authority. It goes in with a certified Turkish translation, in the form the Revenue Administration's general communiqués on double taxation agreements require. If the certificate is not produced, the agreement is not applied, domestic withholding goes on, and you are left chasing a refund. Our guide to claiming treaty relief in Türkiye covers the procedure.
• The Turkish filing window. Article 92 of Law No. 193 requires the annual income tax return to be filed between the start of March and the evening of the twenty-fifth day of March in the following year. Two special cases: if you leave the country during the tax year, the return is due in the 15 days before departure; on death, within four months.
• Certified proof of the foreign tax. As set out above, both Article 123 of Law No. 193 and Article 33 of Law No. 5520 require documents from the foreign competent authority certified by the Turkish embassy or consulate. Budget weeks, not days.
• When the two countries disagree. Article 25 lets you present the case to the competent authority of the country you are resident or a national of, independently of the remedies your domestic law provides. It sits alongside a Turkish objection or tax court claim rather than instead of one, and the domestic time limits run regardless, which is why we treat it in our guide to tax audits and disputes in Türkiye. Note too that Article 25(2) overrides domestic time limits only if the other country's competent authority is notified that the case exists within five years from the end of the taxable year concerned.

A caveat on scope. Rates, thresholds and reporting rules on the Turkish domestic side change with the annual finance legislation, so treat every domestic figure here as something to confirm before you act; the treaty caps, by contrast, can only change if the two governments amend the Agreement. And the treaty covers taxes on income only. It says nothing about inheritance or estate tax, which is a separate question we address for Americans inheriting property in Türkiye.

Our tax practice advises on the Turkish half of cross-border positions, and our US Desk is built for exactly this kind of two-country file, working alongside your US accountant rather than in place of one.

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