The bank had posted net profit of Rs 575.34 crore in the same quarter of the previous financial year.
Interest earned was Rs 12,345 crore for the July- September quarter of the current fiscal, as against 11,462 crore in the year-ago period.
The bank's provisioning was higher at Rs 1,882 crore as opposed to Rs 1,768 crore a year ago.
PNB's total income has increased from Rs 13,020.46 crore in July-September quarter of 2014-15 to Rs 13,701.93 crore for the same quarter of the current fiscal.