Kotak Mahindra Bank's net profit for the December quarter rose 23% year-on-year to ₹1,291 crore, against a profit of ₹1,053 crore in the same period last year. The lender's net interest income rose to ₹2,939 crore from ₹2,394 crore in the year-ago period. Gross bad loans declined to 2.07% of total advances from 2.31% in the corresponding quarter last year.