Before you start

A valid passport — the only thing needed for the tax number itself, no residence permit required
An e-Devlet login if you want to apply or file online, or just walk into any vergi dairesi
Clarity on your day-count and home base for the calendar year, which drives the 183-day test
For freelancers: a muhasebeci (accountant) and a Turkish address to register the business

Step-by-step

1
Get your tax number (vergi kimlik numarası)
Free and open to any foreigner. Apply online through GİB's Dijital Vergi Dairesi 'Potansiyel Vergi Kimlik Numarası' form — enter your name in CAPITALS exactly as printed in the passport and upload the photo page — or in person at any Ankara vergi dairesi with your passport and a photocopy. The 10-digit number is usually issued instantly. Once you hold a residence permit, your YKN functions as your tax number and you may not need a separate one.
OnlineWho: YouMinutes online; same day in personFree
2
Work out your tax residency and worldwide-income exposure
You become a Turkish tax resident if you establish a legal residence (ikametgah) here OR stay more than six months — about 183 days — in a calendar year. Residents are taxed on worldwide income; non-residents only on Turkish-source income. There is a narrow exception for people present solely for a specific, temporary assignment, which is worth checking if you are posted here on a fixed contract. Remote workers paid from abroad should map the day-count before they cross the line unaware.
OnlineWho: You, ideally with an accountantAssess on arrival; reassess each calendar year
3
Employee withholding, or register a sole proprietorship
Employees: the employer withholds income tax through payroll (stopaj) across the progressive brackets, and you usually never file a return. Freelancers and remote workers register a sole proprietorship (şahıs şirketi / serbest meslek) at the tax office. If you are 18-29 and it is your first business, file the start-up notice within 10 days to claim the genç girişimci exemption — a sizeable slice of annual profit is exempt for three years. As of 1 January 2026 the matching Bağ-Kur premium support was repealed, so you pay your own social-security premiums from day one.
In personWho: You; employers handle withholding for employeesRegistration about a day with an accountant
4
Check whether you're inside a teknokent before you negotiate
Under the Technology Development Zones Law No. 4691, wages of R&D, design and support personnel working inside a zone are exempt from income tax, and the companies themselves get corporate-tax relief on qualifying software and R&D earnings. Ankara has three major zones — ODTÜ Teknokent, Bilkent Cyberpark and Hacettepe Teknokent — so a job inside one changes your take-home materially. The regime has been extended several times; confirm the current sunset date and your own eligibility with the employer's finance team and GİB, because support-personnel status is capped as a proportion of headcount.
In personWho: You + your employer's finance/HR teamCheck before signing an offer
5
File the annual return (or use Hazır Beyan)
Türkiye's tax year is the calendar year. Annual income-tax returns are filed in MARCH for the previous year, with tax payable in two instalments at the end of March and the end of July. File through GİB's İnteraktif Vergi Dairesi, or use Hazır Beyan — the pre-filled 'ready declaration' — for simple income such as rent. Most pure employees on a single withheld salary do not file at all. A sole proprietorship also files VAT monthly and provisional tax quarterly, which is why an accountant is effectively mandatory.
OnlineWho: You / your accountantMarch each year; payment in March and July

Documents you’ll need

Passport, and a photocopy of the photo page for in-person applications
Residence permit / foreigner ID (YKN) if you have one — it links to your tax number
Proof of a Turkish address, for registering a sole proprietorship
Income and expense records and e-invoices, for freelancers' VAT and annual filing

Things most newcomers don’t know

A teknokent job in Ankara can beat a higher nominal salary in Istanbul, because the wage itself is income-tax exempt.

Law No. 4691 exempts the wages of R&D, design and support staff working inside a technology development zone. ODTÜ Teknokent, Bilkent Cyberpark and Hacettepe Teknokent are all in Ankara, so the same gross figure lands very differently in your account. Confirm the current sunset date and the support-personnel cap before treating it as guaranteed.

Source: Law No. 4691 (Technology Development Zones); GİB guidance

The tax number is free, passport-only and obtainable before you have any residence permit.

It is the gateway to a bank account, property and utilities, so getting it online through GİB on day one unblocks nearly everything else. Once you do hold a residence permit, the YKN doubles as the tax number.

Source: GİB Dijital Vergi Dairesi

Crossing about 183 days, or holding a legal residence, flips you to worldwide-income taxation.

Non-residents are taxed only on Turkish-source income, but tax residents owe Turkish tax on global earnings. Remote workers paid from abroad trip this line simply by staying too long in a calendar year, often without realising the residence permit itself is a factor.

Source: PwC Worldwide Tax Summaries (Turkey)

For freelancers an accountant is effectively mandatory, not optional.

A sole proprietorship must keep formal books and file monthly VAT, quarterly provisional tax and an annual return, all in Turkish through GİB systems. Almost nobody does this alone — budget a recurring monthly muhasebeci fee from the start.

Source: Provider/accounting consensus

Common mistakes to avoid

Tripping the 183-day residency line unaware and unexpectedly owing Turkish tax on your worldwide income.
Assuming a teknokent exemption applies to your role — support-personnel status is capped, and the regime has a sunset date that has moved before.
Freelancing or invoicing clients without registering a sole proprietorship and charging and filing VAT.
US citizens forgetting they must still file with the IRS, using FEIE or FTC, on top of any Turkish obligations.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.