Based on its Articles of Association the SASG has the functions of:
- Supervisory Authority of the banking,
- financial and insurance sector, and of guarantor of the protection of the investors;
- managing, governing and supervising the payment system;
- managing the Treasury and Tax Department services on behalf of the State, Public Authorities and Autonomous Undertakings;
- depositary of the financial resources of the State and Entities and Authorities of the Extended Public Sector;
- institutional reference point for International Organisations, central banks, foreign financial supervisory authorities and similar entities;
- processing and publishing statistics on the entities it supervises and their activities; State agent for the management of national debt certificates;
- consultancy services to the State as regards to economic issues, specifically with reference to the financial sector and the public finance.