The companies showed an average annual growth of around 56 per cent for the financial years 2005-07 and are expected to achieve an average annual growth of 50 per cent in the next two years, a study ‘India’s Top IT Companies 2008’ by Dun & Bradstreet revealed. “Exports continue to contribute in a major way to the revenues of the Indian IT industry, accounting for around 66 per cent of the total revenue of US$47.8 billion in the 2007 financial year. Services exports from India reached US$81.3 billion in the 2007 fiscal, out of which IT & ITeS-BPO contributed over 38.5 per cent,” D&B India COO Kaushal Sampat said.

Around 43 per cent of the companies feel that the attrition rate will range between 16-20 per cent in the coming year, the study added. According to the study, TCS, Wipro and Infosys  have emerged as the top three firms with a total income of Rs 15,156.52 crore, Rs 13,579 crore and 13,524 crore respectively. HCL Infosystems and Siemens Information System with a total income of Rs 11,818.25 and Rs 10,434 crore held the fourth and fifth position respectively in the list. In employee-wise listing, Infosys, Wipro, TCS, Satyam and Tech Mahindra emerged as the top 5 firms with a total strength of 72,241, 68,000, 52,805, 28,597 and 19,749 each. The study covers 210 companies, each having an annual turnover of more than Rs 10 crore. The companies, in the study, account for about 50 per cent of IT industry, in terms of revenue.