PurposeThis study aims to examine the relationship between the attributes of audit firms (Big 4, audit fees, busy season, audit firm tenure and audit partner gender) and the impact of these attributes on key audit matters (KAM) readability in Malaysia.Design/methodology/approachThe auditor's reports and financial data were analysed from a sample of FTSE 100 Malaysia-listed companies for the fiscal years 2017–2019, consisting of 258 observations. Panel regression analyses were conducted to evaluate the possible associations between audit firm attributes and KAM readability. The Flesch reading ease score and Coleman–Liau index were applied to measure KAM readability.FindingsThe findings show that female audit partners significantly impact KAM readability; further analysis also revealed that companies audited by Big 4 audit firms and higher audit fees tend to report a more readable KAM disclosure in the FTSE 100 in Malaysia.Originality/valueThe regression results provide empirical evidence of the influence of audit firm attributes on KAM readability. This study also examined important corporate governance players, such as external auditors and those charged with governance, who form the audit committee's qualities when analysing the determinants of KAM reporting variations in Malaysia.