Could you guess which tax is the single largest contributor to the government revenue? It’s the Corporation tax, which contributed Rs 1,00,000 crore in the fiscal 2006-07 to the government revenue. According to the Assocham study, the corporation tax has shared 31 percent of the total tax revenue of the Government. It is going to surpass the Union excise duty (likely to be Rs 94,000 crore) in the current financial year. It is expected to be accounted as 28 per cent of the total tax revenue of the Central Government. During the early 90s, the corporate tax revenues had a share of 12.4 per cent in the total tax revenues. The net excise duty was 32 per cent then. Now, India Inc is roaring high on economic gains and this have trickled down to the exchequer in the form of higher Corporate Tax collections.