The main role of 80g certification is to encourage the donors who donate funds to the nonprofit Ngo organization. That is organization hold this 80g certificate to provide tax exemption to the donors who donate their funds and they will get 10% tax exemption on their Gross total income of an accounting year.Here people are thinking that they will get 50% of tax exemption before the calculation of their taxable Annual Income. But it's is not in such a way. 50% of amount is calculated in the amount what they have donated to the nonprofit Ngo organization. And in that 50% of that donated amount, the donor shall get 10% of maximum tax exemption as per Gross total income of the Donor.