In order to increase theusefulness and quality of financial reporting, there is a move to IFRSglobally. Sharing similar motivations with the rest of the world, since 2005all publicly traded companies in Turkey have mandatorily been preparing theirfinancial statements according to International Accounting / FinancialReporting Standards (IFRS). Considering the need for understanding the economicconsequences of harmonization, we investigate the impact of IFRS adoption onthe earnings conservatism as a dimension of reporting quality in Turkey. Theresults of the study show that IFRS adoption has increased both the timelinessand earnings conservatism (asymmetric timeliness), while the impact is strongerfor financial firms, for firms having lower debt levels, and for smaller firms.