The audit has a significant impact because the auditor, on the basis of the company's financial statements, expresses an expert and independent opinion which creates confidence for users of that information in the real and objective situation of that undertaking. In the Republic of Croatia, the Ordinance on the structure and content of annual accounts was published, issuing the obligation to publish audit fees in the notes to the financial statements. Efforts are being made to ensure better quality of audit and a more competitive audit market. Determining the amount of compensation on the market for auditing financial statements would equate the auditor's opinion with any other product or service that has its price. The laws, standards and principles that have to be respected for carrying out the audit to be credible are listed and defined. The concept of audit fee, supply and demand for audit services is explained. The publication of audit fees and determinants influencing its amount were analysed. The analysis provided an insight into the situation on the auditing market. A large market share is controlled by the Great Four. In the Republic of Croatia, the number of audit companies that merge and form part of the Great Four is increasing. The results of the survey showed that there is still a large number of obliged entities who do not publish audit fees. Failure to publish audit fees remains an ongoing issue.