Lengthy delays in the publication of financial reports may adversely affect the efficiency of capital markets. The current study investigates the effect of auditing firm rotation on financial report disclosure dates. Accordingly, 1.200 company-year observations obtained from annual reports of non-financial institutions traded on the Borsa Istanbul for the years 2010-2017 are analyzed. The results of the current study indicate that there is a statistically significant positive relationship between financial report disclosure dates and audit firm rotation. In other words, financial report delay is longer following audit firm rotation. The results of the study are expected to provide benefits to regulatory authorities in the publication of timely financial reports necessary for the effective functioning of the capital market.