Almost every transaction a foreign national wants to complete in Türkiye — buying property, opening a bank account, forming a company, paying a fee — begins with a number that takes about ten minutes to obtain and that most people do not know exists until a counter asks for it. This article explains what the potential tax identification number is, how to get one without leaving your own country, and what it does and does not allow.
What it is
A potential tax identification number (potansiyel vergi kimlik numarası) is a tax number issued by the Turkish tax administration to a foreign national who does not hold a Turkish identity number but needs to carry out a transaction with tax consequences.
"Potential" refers to the taxpayer status, not to the number's validity. It is a real tax number, it identifies the holder in the tax system, and it is used exactly as a resident's number would be for the transactions it covers.
What it allows
- Buying property. The land registry requires a tax number from a foreign buyer. A residence permit is not required.
- Opening a bank account. Banks require it; policies on other documents vary.
- Forming a company and being registered as a shareholder or director.
- Paying taxes and fees — title deed fees, property tax, income tax on rental income.
- Notarial transactions, for many of which it is requested.
- Utility subscriptions and vehicle registration, in some circumstances.
- Inheritance and estate transactions, where a foreign heir must deal with Turkish assets.
What it does not do is confer any right to reside or to work. It is a tax identifier, not a status.
How to obtain one
There are three routes, and the first is the one most people should use.
Online, through the Interactive Tax Office. The tax administration's portal issues potential tax numbers to foreign nationals on the strength of passport details — name, surname, date and place of birth, parents' names, passport number, nationality. The number is generated immediately and can be obtained from anywhere in the world. There is no fee.
At a tax office in Türkiye. With a passport and, in some offices, a notarised Turkish translation of it. Minutes rather than days.
Through a representative. A lawyer holding a power of attorney can obtain the number on the applicant's behalf, which matters where the online route fails for a particular passport format or where the number is needed as part of a larger file.
Accuracy matters more than anything else
The single recurring problem with tax numbers is not obtaining them but obtaining them correctly.
The details entered must match the passport exactly. Where a name is transliterated from another alphabet, or where a passport records a name in a different order or with different diacritics from other documents, mismatches arise — and a mismatch between the name on the tax record, the name on the title deed, and the name on the bank account produces work at exactly the wrong moment.
Two practical rules. Enter the details exactly as they appear in the passport, including middle names and spelling. And where the applicant holds documents in more than one script or format, decide at the outset which version will be used consistently across every Turkish record.
Correcting a tax record afterwards is possible but is an application in its own right, and it delays whatever transaction discovered the problem.
The number and the identity number
A foreign national who later obtains a residence permit receives a foreigner identification number (YKN), an eleven-digit number beginning with 99, printed on the residence permit card. It functions as the holder's identity number in Türkiye.
Where a person holds both, the systems link them, and the YKN becomes the operative reference for most purposes. Institutions holding the older tax number may need their records updated — banks in particular — and it is worth doing that proactively rather than at the point of a transaction.
A person who later acquires Turkish citizenship receives a citizen's identity number, and the same exercise arises again.
Where the sequence matters
The order of operations for a foreign investor is fixed, and attempting it in a different order produces refusals that look like obstruction:
- Tax number — first, online, before travelling.
- Bank account — requires the tax number.
- Transfer of funds — into the account, from the applicant's own account abroad.
- Transaction — property purchase, company formation, investment.
- Residence permit, where required, on the appropriate ground.
- YKN — assigned with the permit.
An investor who arrives in Türkiye intending to buy a property that week, without a tax number and without an account, will spend the first days obtaining both. Doing it in advance costs nothing.
Obligations that follow
Having a tax number does not by itself create a tax liability. What creates liability is income or a taxable transaction. But once a person owns Turkish property or earns Turkish income, the obligations are real:
- Property tax annually to the municipality, in two instalments.
- Rental income tax, declared annually where a property is let.
- Title deed fee on acquisition.
- Withholding on interest and certain other income.
Non-residents are taxed on Turkish-source income; residents on worldwide income. Residence for tax purposes turns on presence and centre of living rather than on citizenship, and where the position is unclear it should be assessed rather than assumed. A double taxation treaty between Türkiye and the person's country may allocate taxing rights.
Frequently asked questions
Is there a fee? No.
Can I get one from abroad? Yes, online through the Interactive Tax Office.
Does it expire? The number remains valid; keep the record accurate.
Do I need a residence permit first? No.
Does having one make me a Turkish taxpayer? Only income or a taxable transaction does.
Can my lawyer obtain it for me? Yes, under a power of attorney.
What if my name is spelled differently on different documents? Resolve it before the number is issued. Consistency across Turkish records saves considerable trouble.
A ten-minute step that unblocks everything
The tax number is the least demanding requirement in Turkish administrative practice and the one whose absence stops the most transactions. Obtain it before you travel, enter the details exactly as they appear in the passport, and keep the same spelling everywhere afterwards.
Dural Hukuk obtains tax numbers for clients abroad, resolves record inconsistencies before they block a transaction, and handles the banking, property and corporate steps that follow. Call +90 535 260 74 54 or use the contact form on this site.
This article is general information on Turkish law and tax practice as at August 2026 and is not legal or tax advice. Obtain advice on your own circumstances.