Bank's net profit stood at Rs 1,760.52 crore in the 2014-15 fiscal.
Total income of the bank, however, increased marginally in 2015-16 to Rs 36,250.10 crore from Rs 36,121.40 crore in the previous fiscal, the bank said in a regulatory filing.
The bank did not provide numbers for the January-March quarter of 2015-16.
On asset front, the gross non-performing assets (NPAs) or bad loans shot up to 8.70 per cent of gross advances as of March 2016 as against 4.96 per cent a year ago. In absolute terms, the gross bad loans were Rs 24,170.89 crore, up from Rs 13,030.87 crore.
The bank said following to the RBI circular, it made a provision of Rs 907.75 crore during the year for frauds/suspected frauds.
Shares of Union Bank closed 1.28 per cent up at Rs 110.75 apiece on BSE.