The Taxes Consolidation Act 1997 (No. 39) is a pivotal piece of legislation in Irish tax law, designed to integrate and simplify the previously scattered tax statutes. By consolidating various provisions concerning income tax, corporation tax, and capital gains tax, the Act provides a coherent legal framework that enhances accessibility for taxpayers and advisers. It restates existing laws with limited policy alterations, ensuring clarity through systematic organisation, the removal of outdated provisions, and standardised definitions.

This Act outlines essential tax rules, including those on residence, domicile, and income sources, alongside provisions for exemptions, reliefs, and anti-avoidance measures. Importantly, the Act also updates administrative procedures for assessments, audits, and tax collections, establishing a solid foundation for future legal adjustments. Today, it remains central to the interpretation and ongoing development of tax legislation in Ireland.