The paper presents the study of the influence of chosen factors on the price of the mandatory audits for large companies in Slovenia, in the period from 2010 to 2014. The final sample consists of 177 large companies in Slovenia for each year or all together 885 entities. The main observed factors have been taken from financial statements, these are operating revenues, profit (loss) and indebtedness of the company. Three hypotheses were tested by regression analysis, ANOVA and Independent-Samples Median Test. The average price for mandatory audits of a large company in the observed period amounted to EUR 21,182. In research we found out that statistically significant factors of the statutory price of audit are just operating revenues of the audited entity. The results of this research can offer large companies and auditing companies incentive for awareness and dialogue between them about the quality, professionalism and responsibility of work of certified auditors.