In the context of the globalisation of financial markets and the widespread adoption of International Financial Reporting Standards, the issue of the quality of financial reporting prepared in accordance with these standards is becoming increasingly relevant. The principle-based nature of these standards implies the extensive use of various accounting models, which directly influence the formation of financial indicators and the level of their informational usefulness for users. At the same time, the absence of a single rigid algorithm for the application of accounting models creates risks of reduced comparability, increased complexity of interpretation, and ambiguity in analytical conclusions. The purpose of the article was to investigate the role of accounting models in shaping the quality of financial reporting prepared in accordance with International Financial Reporting Standards and to assess their impact on the informational usefulness of financial indicators for different groups of users. The methodological basis of the study included methods of theoretical generalisation, comparative analysis, a systematic approach, and logical modelling, which made it possible to comprehensively analyse the relationship between the principles of International Financial Reporting Standards, accounting models, and the qualitative characteristics of financial information. The study found that the quality of financial reporting prepared in accordance with International Financial Reporting Standards is determined not only by compliance with standards, but primarily by the selection and application of specific accounting models. It was substantiated that different measurement models for assets and liabilities affect the relevance, reliability, comparability, and understandability of financial information in different ways. The presence of a conceptual trade-off between increasing the economic realism of indicators and the growing complexity of their interpretation has been identified. It was proven that the informational usefulness of financial reporting largely depends on professional judgment and the analytical capacity of users. The practical significance of the obtained results lies in the possibility of their application to improve analytical approaches to the evaluation of financial reporting prepared in accordance with International Financial Reporting Standards, enhance the quality of managerial and investment decision-making, and further develop the methodology of financial analysis in a principle-based accounting environment