The bank had reported a net profit of Rs 696.70 crore in the April-June quarter of last fiscal, it said in a BSE filing.
However, Kotak's total income increased to Rs 6,384.63 crore in the April-June quarter from Rs 5,006.63 crore in the same period of last fiscal, it added.
These are the first quarterly numbers after the amalgamation of ING Vysya Bank with Kotak Mahindra Bank. RBI gave nod for merger between the two banks to create country's fourth-largest private sector lender, effective April 1, 2015.
Provisions and contingencies of the bank during the quarter increased more than 10-fold to Rs 321.90 crore as against Rs 27.24 crore at the end of first quarter a year ago.
Kotak Mahindra Bank shares closed 1.36 per cent down at Rs 716.15 per unit on the BSE.