Köker Yeminli Mali Müşavirlik ve Bağımsız Denetim A.Ş. is a Turkish accounting, audit and advisory firm with offices in Ankara, Istanbul and Zonguldak. It is a member of AGN International, a global association of independent accounting and consulting firms. The company is authorised to conduct independent audits under the relevant regulations of Turkey’s Public Oversight, Accounting and Auditing Standards Authority (KGK), Capital Markets Board (SPK) and Energy Market Regulatory Authority (EPDK).

Its services include certified public accounting, tax certification and independent audits. Tax services cover full tax certification, VAT and special consumption tax refund certifications, investment incentives, capital reports and certification of eligible research and development expenditure. Audit work includes statutory and project audits, international financial reporting, due diligence and audits for supported development projects.

Köker also provides corporate and individual tax advice, guidance on incentives, exemptions, tax treaties and disputes, and financial advice for foreign companies. Further consulting includes accounting-system design, internal control and audit, cost control, company establishment, restructuring, mergers and acquisitions, and support on capital markets, social security and corporate law. The firm also offers professional training through its academy.