The tax audit of expenses transactions represents one of the most critical and high-risk areas in the overall tax compliance process.

Throughout this discussion, it is evident that while expenses are a necessary component of business operations, they are also one of the primary causes of tax adjustments during audits. This is largely due to the level of judgement involved, the reliance on supporting documentation, and the complexity of classification and deductibility rules under the Income Tax Act 1967 (Malaysia, 1967).

From an audit perspective, LHDN does not merely assess whether an expense has been incurred. Instead, each expense is evaluated based on its business purpose, supporting evidence, classification, and compliance with tax legislation. Even genuine business expenses may be disallowed if they are improperly documented, incorrectly treated, or fail to satisfy statutory requirements (Inland Revenue Board of Malaysia, 2019).

The application of structured audit techniques such as vouching, tracing, analytical procedures, and data cross-referencing further highlights the importance of maintaining accurate, consistent, and well supported records. At the same time, the practical issues and challenges discussed demonstrate that many audit problems arise not from intentional misconduct, but from weaknesses in documentation, internal controls, and understanding of tax rules (Messier, Glover, & Prawitt, 2017).

Ultimately, effective management of expenses transactions requires more than compliance with accounting practices alone. It requires a clear understanding of tax treatment, proper classification, and readiness to support every expense claim during an audit.

Businesses that adopt a proactive and structured approach supported by strong documentation practices, effective internal controls, and periodic review are significantly better positioned to minimise audit exposure, reduce the risk of adjustments, and maintain long-term tax compliance (Inland Revenue Board of Malaysia, 2019).