Is there any rule of income tax if the tax is below 100 then it is not mandatory to deposit? Yes, it is not it is not mandatory to deposit tax if the tax is below Rs.100. Related articles Do NRIs need Aadhaar card to e-file? why 10% tax is still calculated for 2.5-5 lac slab ? Is RD interest taxable? Comments 0 comments Please sign in to leave a comment.