HDFC Bank has posted a 34% increase in net profit at Rs 321.23 crore for the quarter ended June 30, 2007 (Q1FY08) when compared with Rs 239.30 crore for Q1FY07.According to an official release issued by the bank to the BSE today, total income has increased to Rs 2641.70 crore for Q1FY08 from Rs 1795.21 crore for Q1FY07.