(4)Where an assessee, being a person other than a company, has failed to pay the advance tax payable by him on or before the due date for any instalment or where the advance tax paid by him is less than the amount payable by the due date, he shall be liable to pay simple interest calculated at the rate of-(i)one per cent. per month, for three months on an amount by which the advance tax paid on or before the 15th September of the financial year falls short of thirty per cent of the advance tax payable;(ii)one per cent. per month, for three months on an amount by which the advance tax paid on or before the 15th December of the financial year falls short of sixty per cent of the advance tax payable; and(iii)one per cent. on an amount by which the advance tax paid on or before the 15th March of the financial year falls short of hundred per cent of the advance tax payable.