Turkey’s Revenue Administration has opened the corporate income tax filing period for the 2024 fiscal year. Corporate taxpayers must file their returns electronically via the Digital Tax Office  between 1 and 30 April 2025.

This announcement was made by Turkey’s Revenue Administration on 4 April 2025.

Payments of the assessed corporate tax are also due within this period and can be made through various channels, including the Digital Tax Office, the GİB Mobile App, and authorised banks.

Payment options include credit or bank cards of contracted banks, foreign bank cards and online or in-person banking services.

A guidance document has been issued to assist with the filing process.

According to the provisions of the Turkish Commercial Code No. 6102, joint stock companies, limited liability companies, and limited partnerships divided into shares, as well as similar foreign entities, are considered capital companies.

The entire income of joint stock and limited liability companies is subject to corporate income tax. In limited partnerships divided into shares, corporate tax liability applies only to the share of the limited (silent) partner. The portion of the taxable corporate income attributable to limited partners is subject to corporate income tax, while the portion attributable to general partners is subject to personal income tax and must be declared by the partners themselves.

For the 2024 fiscal year, the standard corporate income tax (CIT) rate is set at 25%. However, businesses exclusively focused on exports are eligible for a reduced rate of 20%. Industrial companies with a valid industrial registration certificate can enjoy a 1% reduction, lowering the rate to 24%. Publicly listed companies with at least 20% of their shares in public hands can benefit from a 2% reduction in the CIT rate for the first five years following their listing.

The guide further outlines taxable income, providing examples to distinguish between deductible and non-deductible expenses, such as personnel costs, interest, rent, depreciation, and contributions to specific professional bodies. It also covers topics like foreign-source income, long-term construction and repair contracts, and income derived from permanent establishments outside the country.