Öz
The incurred loss model in IAS 39 has been replaced by the expected credit loss model of IFRS 9, which became effective as of 1/1/2018. There are three approaches to measure expected credit losses, namely general, simplified and credit-adjusted approach. In this study, whether there is a difference in the methods used to measure expected credit losses between the financial and nonfinancial firms traded in BIST 30 Index and the reasons for the difference are examined. It is concluded that while financial firms use the method of probability of default within the scope of the general approach, non-financial firms generally do not disclose the names of the methods used and they preferred the simplified approach methods. The reason for this could be that characteristics of receivables of financial and non-financial firms and their credit risk management systems are different.