This study investigates the direct and indirect effects of audit planning on audit quality through two underlying mechanisms: audit work program and internal auditor competency. Utilizing a sample of auditors from the Regional Inspectorate of Tasikmalaya City, data were analyzed using SPSS Version 25 software, followed by testing for validity and reliability. The findings reveal that audit planning has a substantial direct and indirect impact on audit quality. The indirect effect is mediated by the audit work program and internal auditor competence, indicating that these processes play a crucial role in the association between audit planning and audit quality. This study’s findings provide auditors and audit firms with significant insights into improving audit quality via effective audit planning, the implementation
of audit work programs, and internal auditor competency.