The National Treasury Management Agency Act 1990 established the NTMA, signifying a substantial modernisation in the management of Ireland's public debt and financial assets. Prior to this Act, the processes for debt management were disjointed, lacking the necessary expertise. The NTMA serves as a centralised, professional entity tasked with effectively managing borrowing, debt servicing, risk assessment, and investment operations in both domestic and international markets.

This legislation grants the Minister for Finance the authority to delegate significant responsibilities to the NTMA, including the issuance of government debt and the management of fiscal liabilities. While the NTMA operates independently, it remains accountable through established reporting and audit practices. The Act architecture facilitates the recruitment of skilled financial professionals, paving the way for advanced financial practices and ultimately laying the groundwork for further developments such as the NPRF and NAMA.