Kiska was born in Poprad. He studied electrical engineering. His father was an active member of the ruling Communist Party of Czechoslovakia. He also applied for Communist party membership, but was rejected. Kiska was married to, an educator and politician from 1985 until 2001. They had two children, Andrej Kiska and Natália Kisková. The couple divorced in 2001 after 18 years of marriage. Kiska married his second wife, Martina Kisková, in 2003. The couple have three children- - Veronika, Viktor, and Martin.
In 1990, after the Velvet Revolution, he moved to the United States. Later he founded Triangel and Quatro, two Slovakia-based hire-purchase companies that give the buyer the possibility to pay for goods in several installments over a number of months instead of paying the full price at once. Tax authorities accused his co-owned company KTAG of tax non-compliance and under-payments, regarding expenses for his presidential campaign. The company eventually agreed to pay the taxes and a penalty.
Tax non-compliance and legal problems
Andrej Kiska's companies were involved in a number of tax-non compliance issues. Improperly reported income from various business activities resulted in a smaller VAT and Income tax payments. In his personal tax filing he did not disclose personal propagation before elections performed by his company as a non-cash income, but claimed that he paid for it. Eventually tax office confirmed he did not pay, did not report non-cash income, and his company did not report income from propagation activities but fully deducted all VAT. Remaining costs additionally decreased tax base.
In 2006, Kiska co-founded a non-profitcharitable organization called Dobrý anjel, in which donors help families that have found themselves in a difficult financial situation as a result of a family member contracting a serious disease. By 2016, more than 170,000 people have donated to this organization in Slovakia. In 2014 Good Angel expanded their activities also to Czech Republic, where 60.000 are paying their monthly contributions in 2016. In addition to that, Kiska donates his monthly presidential salary to people in need.
In the first round of the 2014 Slovak presidential election, Kiska placed second with 24% of the vote, behind Prime MinisterRobert Fico. As none of candidates got more than 50% of votes, Kiska and Fico progressed to a presidential runoff vote on 29 March 2014. With the support of right-wing parties and other defeated candidates, Kiska won decisively in the second round, receiving nearly 60% of the vote. He took office on 15 June 2014. Kiska announced on 15 May 2018 that he will not participate in 2019 presidential election, arguing that his departure might end "the era of political confrontation" his country faced and citing a desire to spend more time with his family. At the time Kiska made the announcement, polls indicated that he was Slovakia's most trusted politician and that he would have likely been the frontrunner in the election had he chosen to present himself as a candidate.