State Bank of India has posted Rs 2,478-crore net profit for the quarter ended December 31,2008 on standalone basis,compared with Rs 1,808.64-crore in the year-ago period. The consolidated net profit of the country's largest lender zoomed by 52 per cent to Rs 3,713.66 crore. Total income of the bank rose to Rs 21,255.90-crore during the quarter from Rs 15,364-crore in the same period last fiscal.