In addition to residency criterion, within a limited scope, nationality criterion also applies regardless of their residency status, Turkish citizens who live abroad and work for government or a governmental institution or a company whose headquarter is in Turkey, are considered as unlimited liable taxpayers. Accordingly, they are subject to the income tax on their worldwide income.
Non-residents are only liable to pay tax on their income derived from the sources in Turkey (limited liability). For tax purposes, it is especially important to determine in what circumstances income is deemed to be derived in Turkey. The provisions of Article 7 of the Income Tax Law deal with this issue. In the following circumstances, the income is assumed to be derived in Turkey.