Tax incentives play a crucial role in the decision-making process of companies and individuals engaged in R&D. To stimulate R&D investment in Turkey, the government has introduced several pieces of incentive legislation, mostly tax allowance and exemption schemes, each taking a different approach. This article focusses on three major incentives, namely Law No. 4691 on the Technology Development Zones Incentive, Law No. 5746 on Promoting Research, Development and Design Activities and article 5(B) of the Corporate Income Tax Law.