The Social Insurance Agency (SIA) was established on November 1, 1994 by Act No. 274/1994 Coll. on Social Insurance Agency as a statutory institution entrusted with the performance of sickness insurance and pension security, which was taken over from its predecessor, the National Insurance Agency. On April 1, 2002, it also took over employer's liability insurance for damage caused by accidents at work and occupational diseases - accident insurance from the Slovak Insurance Agency. Since January 1, 2004, SIA has been providing social insurance based on Act No. 461/2003 Coll. on Social Insurance, i.e. sickness insurance, pension insurance - old-age and invalidity insurance, accident insurance, guarantee insurance and unemployment insurance.
SIA was entrusted by the Treaty on the Accession of the Slovak Republic to the European Union from May 1, 2004 to determine the jurisdiction of legal regulations according to Title II of Regulation (EC) of the European Parliament and Council no. 883/2004 on coordination of social security systems.
Since January 1, 2005, the SIA also carries out activities within the framework of old-age pension savings – primarily collecting contributions, forwarding them to pension management companies and registering old-age pension savings contracts.
Since January 1, 2015, SIA has also been managing the Central Information and Offer System (CIPS), through which the saver/applicant for a pension from old-age pension savings receives all pension offers from insurance companies and pension management companies from one source, making it easier to compare offers of individual companies. CIPS also serves for the exchange of information between pension management companies, insurance companies and SIA in the payment phase, which prevents excessive administrative burden on savers, insurance companies and pension management companies, and at the same time, serves for the administration of all important information related to the payment of pensions from old-age pension savings.