If the Tax exceeds the income than assessee can clain relief from surcharge For Eg. Surcharge on income of 1 Cr is 0 and Surcharge on income of 1.01 Cr is 1,10,000 So you will get relief of Re 10000 i.e 110000 - (1.01 Cr - 1 Cr)
The concept of marginal relief is designed to provide relaxation from levy of surcharge to a taxpayer where the total income exceeds marginally above Rs. 50 lakh, Rs. 1 crore or Rs. 10 crore, as the case may be.
Thus, while computing surcharge, in case of taxpayers (i.e. Individuals/HUF/AOP/BOI/artificial juridical person) having total income of more than Rs. 50 lakh marginal relief shall be available in such a manner that the net amount payable as income-tax and surcharge shall not exceed the total amount payable as income-tax on total income of Rs. 50 lakh by more than the amount of income that exceeds Rs. 50 lakh.