PurposeThis paper aims to (1) investigate the effect of other comprehensive income (OCI) on audit fees (AF) and audit report lag (ARL) and (2) test the moderating effect of board gender diversity (BGD) on such relationships.Design/methodology/approachThis paper uses data extracted from the financial reports for a sample of Egyptian firms from 2013 to 2019, where the data are processed using the Panel Corrected Standards Errors (PCSE) and the Structure Equation Model (SEM).FindingsThe results reveal that (1) the OCI existence and OCI volume have a significant positive effect on AF and ARL, and (2) the presence of female directors on the board and the percentage of female representation affect the relationship between OCI and AF positively, but this effect on the relationship between OCI and ARL is insignificant.Research limitations/implicationsThis paper has some limitations, where the analysis uses a small sample of Egyptian listed firms, as well as, the measures that were used as proxies of the study variables, which do not necessarily express the most suitable ones.Practical implicationsThe results of this paper would (1) provide signals to the audit market, the professional bodies in Egypt and stakeholders about the determinants of AF and ARL, (2) provide guidelines that support the capital market authority to consider gender diversity in boards of companies taking into considerations its impact on AF and ARL, and (3) help the accounting setters in emerging economies as Egypt in drafting more suitable standards and guidelines regarding OCI.Originality/valueThis paper adds to the literature on OCI, where it investigates the effect of OCI on ARL, which was not yet studied in prior studies. Also, this paper complements and extends the literature by providing empirical evidence from one of the emerging markets as Egypt about the effect of BGD on the relationships between OCI, AF and ARL, as these relationships have not been examined before.