Kılıç was born in Hacı Hasanlı village of Çiçekdağı district of the Kırşehir Province in Turkey. In 1968 he attended Eskişehir Academy of Economics and Commerce and graduated in 1972. Between 1974 and 1985, he served as a financial auditor at the Court of Auditors of Turkey, which is a high judicial body according to the Constitution of Turkey. He was elected as a member of the Board of the Court of Auditors of Turkey, a position he held five years long.
On December 7, 1990, he was appointed as a judge of the Constitutional Court by Turgut Özal, then President of the Republic of Turkey. On December 7, 1999 and December 7, 2003, he was elected twice as the deputy president of the court.
He is married to Gönül Kılıç. The couple has four children.