"The Finance Minister had his own limitations in terms of resources... You know how much the bill is going to come for 1 per cent deduction? It means the government has to take a hit of Rs 15,000 crore," Revenue Secretary Hasmukh Adhia said at the PHD Chamber event here.
Finance Minister Arun Jaitley had last year promised to lower corporate tax rate from 30 per cent to 25 per cent over four years and it was expected that he would begin the process of gradual reduction of tax rates from 2016-17.
Adhia said the corporate tax rates cannot be reduced till the benefits of phasing out exemptions start coming in.
"The benefit of exemptions phase out is coming to the government only in 2017-18, that also in the first year we will get a small benefit of 3,000 crore," he said.
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Jaitley in his 2016-17 Budget announced some concessions for corporates, like 25 per cent tax on new manufacturing units. He also reduced the tax on small units with a turnover of Rs 5 crore from 30 per cent to 29 per cent.
Referring to GST, Adhia said that efforts would be made to implement it as early as possible.
He also appealed to the industry to support the government in its attempt to implement GAAR by 2017.
He said the Minimum Alternate Tax (MAT) rates cannot be brought down at this juncture as the government has already kept a sufficient space for corporates to enjoy tax exemptions in other forms.