Miftah Ismail, who was serving as adviser to the Prime Minister for Economic Affairs, took oath as finance minister on Friday, hours before presenting the federal budget for fiscal year 2018-19.
President Mamnoon Hussain administered the oath at President House early in the morning after Prime Minister Shahid Khaqan Abbasi appointed him under Article-91 (9) of the constitution.
Several ministers and government officials attended the ceremony.
The federal government led by the PML-N is set to present its sixth consecutive budget April 27, Friday, almost a month ahead of its five-year term coming to an end.
Mr Ismail has been serving as adviser on finance since December 2017. Earlier, he served as the chairman of the Pakistan Board of Investment and an economist with the International Monetary Fund.