Section 118 : Fees to be charged in cases where the person making payment in installments makes lesser payment of estimated tax:
1) In cases where the amount of installment tax paid by any person pursuant to clause (a) of this Sub-section is less than the amount of tax to be paid in installment pursuant to clause (b), interest shall be charged on such less amount pursuant to Sub-section (2):-

a) The estimated or amended amount of tax computed by the person required to pay tax in installment pursuant to Section 95 in respect of the installment tax to be paid in any year pursuant to section 94,

b) The amount of tax to be set by ninety percent of the amount of tax to be paid by the person referred to in clauses (a) and (b) of Section 3 in that year.

2) A fee in a sum to be set by the normal rate of interest, for each month and portion of the month, from the due date for payment of the first installment in that year until the date on which the tax is assessed and becomes due and payable pursuant to Section 99 shall be imposed on the person referred to in Sub-section (1).

3) In cases where the amount referred to in clause (a) is higher than the amount referred to in clause (b), interest shall be charged, pursuant to Sub-section (2), on such higher amount by the normal rate on the amount of each period.

a) In cases where the estimate or revised estimate of the total amount to be paid by any person in installment for each installment period in any income year is accurate, Ninety percent of the amount,

b) The amount of installments paid in that income year.