Direct tax collections registered 15.75 per cent to Rs. 85,647 crore growth during first four months of present fiscal driven by a healthy 21 per cent jump in corporate income tax realisation. In the corresponding period last fiscal, direct tax collection stood at Rs. 73,990 crore.As per the data released by the Central Board of Direct Taxes today, the growth in corporate income tax logged at Rs. 51,627 crore as against Rs. 42,685 crore in the previous year. Mobilisation from personal income tax, which includes securities transaction tax, residual fringe benefit tax and banking cash transaction tax, grew 8.51 per cent to Rs. 33,940 crore up from Rs. 31,279 crore.The securities transaction tax, however, continued to fall. STT collected during the four-month period ending July declined by 26.25 per cent to Rs. 1,652 crore compared to Rs. 2,240 crore in the year-ago period.