The bank's net profit in July-September quarter of the last fiscal was Rs 2,979 crore.
Its total income during the September quarter also slipped to Rs 30,191 crore, as against Rs 32,435 crore in the year-ago period, ICICI Bank said in a statement.
On standalone basis, net profit declined by 34 per cent to Rs 2,058 crore for the second quarter as compared to Rs 3,102 crore in the same period of the previous fiscal.
However, net interest income rose by 9 per cent to Rs 5,709 crore compared to Rs 5,253 crore in the second quarter of last financial year.
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ICICI Bank's gross non-performing assets (NPAs) or bad loans jumped to 7.87 per cent as against 6.12 per cent in the year-ago period.
Similarly, net NPAs rose to 4.43 per cent compared with 3.21 per cent in the previous fiscal.
During the quarter under review, the bank made provisions (other than tax) and contingencies of Rs 4,502 crore as against Rs 7,083 crore in the same quarter of the previous fiscal.