Turkish Tax Residency and the 183-Day Rule: When Does a Foreign Investor Become a Turkish Tax Resident?

Citizenship and Tax Residency Are Not the Same Status

A recurring misunderstanding among investors is the assumption that acquiring Turkish citizenship automatically makes a person a Turkish tax resident, or conversely that holding a foreign passport shields a person from Turkish taxation. Neither proposition is correct. Turkish tax residency is determined under the Income Tax Law No. 193 (Gelir Vergisi Kanunu) by reference to residence and physical presence, not by nationality. A Turkish citizen living permanently abroad may fall outside full Turkish tax liability, and a foreign national holding no Turkish citizenship may fall squarely within it.

The distinction is not academic. It determines whether a person is taxed in Türkiye on worldwide income or only on Turkish-source income, and it governs eligibility for the twenty-year foreign-income exemption introduced by Law No. 7582.

The Statutory Test: Domicile and the Six-Month Rule

Under Income Tax Law No. 193, taxpayers are divided into two categories. Persons treated as resident are subject to full liability (tam mükellefiyet) and are taxed on income earned both inside and outside Türkiye. Persons not treated as resident are subject to limited liability (dar mükellefiyet) and are taxed only on income sourced in Türkiye.

Residence is established on either of two grounds. The first is legal domicile: persons whose place of residence (ikametgâh) is situated in Türkiye within the meaning of the Turkish Civil Code. The second is duration of presence: persons who reside in Türkiye continuously for more than six months within a single calendar year. This second limb is what is commonly described as the 183-day rule. Temporary absences do not interrupt the calculation.

The Law also provides that certain foreign nationals who come to Türkiye for a defined and temporary purpose — including specified categories such as business assignments, education, medical treatment or convalescence — are not treated as resident even where their stay exceeds six months. The scope of these exceptions is narrow and fact-specific, and it should not be assumed to apply merely because a stay was intended to be temporary.

Why the Distinction Matters for Investors

For an investor with substantial income arising outside Türkiye — dividends, interest, rental income, business profits or capital gains in another jurisdiction — the consequence of falling into full liability is that this foreign-source income enters the Turkish tax base. For an investor whose affairs are structured on the assumption of limited liability, an unintended crossing of the residence threshold can produce a materially different outcome from the one contemplated.

This is precisely the point at which Law No. 7582 becomes relevant. The exemption introduced by Mükerrer Article 20/D of the Income Tax Law is available to qualifying persons who become Turkish tax residents from 1 January 2026 and who had no domicile or tax liability in Türkiye during the three preceding calendar years. The exemption is therefore addressed to persons entering Turkish tax residency, not to those already within it. Understanding the moment at which residency is established is a precondition to assessing eligibility.

Residence Permits, Citizenship and Tax Status

Holding a Turkish residence permit (İkamet) does not by itself create Turkish tax residency, and citizenship conferred by Presidential Decree does not by itself create it either. Each is an immigration or nationality status. Tax residency is assessed separately against the statutory tests described above. In practice the three statuses frequently move together, because a person who obtains a residence permit and relocates will ordinarily also satisfy the residence test — but they are legally distinct and can diverge.

Dual Claims and Treaty Tie-Breakers

Where two states each treat the same person as resident under their domestic law, the position is resolved — where a treaty is in force — under the residence article of the applicable Double Taxation Agreement. Türkiye maintains an extensive treaty network. The standard treaty sequence examines, in order, the location of a permanent home available to the person, the centre of vital interests where a home is available in both states, habitual abode where the centre of vital interests cannot be determined, and nationality as a subsequent criterion, with competent-authority resolution as a final step.

The practical consequence is that domestic Turkish law is not always the last word. An investor who satisfies the Turkish six-month test may nonetheless be treaty-resident elsewhere, and the analysis requires the domestic law of both states and the specific treaty to be read together.

Evidencing Residency

Where Turkish tax residency needs to be demonstrated to a foreign authority — commonly to claim treaty benefits or to establish that income has been brought within the Turkish base — the instrument used is a certificate of residence (mukimlik belgesi) issued by the Revenue Administration (Gelir İdaresi Başkanlığı). Foreign authorities generally require the certificate for the relevant period rather than a general statement of status.

Assessment Before Commitment

Tax residency is one of the few areas where the sequence of steps materially affects the outcome. The date on which residence is established, the calendar years preceding it, and the interaction with the investor's existing jurisdiction of residence all bear on whether the Law No. 7582 exemption is available and on what is taxable in the interim. These are questions that are properly assessed before an investment structure is fixed, not afterwards.

This article provides general information on Turkish law and does not constitute legal or tax advice. Tax residency turns on the specific facts of each case, including days of presence, domicile, and the terms of any applicable Double Taxation Agreement. To assess your position under Income Tax Law No. 193 and the Law No. 7582 exemption, book a consultation with Av. Abdulsamed Burak Turak.