80G is a certificate that exempts you part or fully from paying taxes, if you have made donations to charitable trusts or section 8 company or organizations that are registered to offer you exemptions from taxes. As per law, Income of a charitable trust is exempt according to Section 11, 12, 12A, 12AA, 12AB and 13. The primary condition for getting income exempt under this section is that, the NGO should be one established in accordance with law and its object should fall within the definition of the term “Charitable Purpose” and definition of charitable purpose is given in Section 2(15) of Income Tax Act. There is however a maximum allowable deduction criteria. The criterion is if the aggregate of the amount you donate exceeds 10% of the total gross income, then the excess amount will not qualify for tax benefit.