Calculation of Interest u/s 234A, 234B, 234C and 234D
1. Interest u/s 234A:
For late or non furnishing of return, simple interest @ 1% for every month or part thereof from the due date of filing of return to the date of furnishing of return, on the tax as determined u/s 143(1) or on regular assessment as reduced by TDS/ advance tax paid or tax reliefs, if any, under double tax avoidance agreement with foreign countries.
2. Interest U/s 234B:
For short fall in payment of advance tax by more than 10%, simple interest @ 1% per month or part thereof is chargeable from 1st april of the Assessment year to the date of processing u/s 143(1) or to the date of completion of regular assessment, on the tax as determined u/s 143(1) or on regular assessment less advance tax paid/ TDS or tax reliefs, if any, under Double Tax Avoidance Agreements with foreign countries.
3. Interest u/s 234C:
For deferment of advance tax. If advance tax paid by 15th SEptember is less than 30% of advance tax payable, simple interest @ 1% is payable for three months on tax determined on returned income as reduced by TDS/TCS/ Amount of advance tax already paid or tax relief, if any, under Double Tax Avoidance Agreement with forgiving contribution. Similarly, if amount of tax paid on or before 15th December is less than 60% of tax due on returned income, interest @ 1% per month is to be charged for 3 months on on the amount stated as above. Again, if the advance tax paid by 15th March is less than tax due on returned income, interest @ 1% per month on the shortfall is to be charged for one month.
4. Interest u/s 234D:
Interest @ 0.5% is levied under this Section when any refund is granted to the assesse u/s 143(1) and on regular assessment it is found that either no refund is due or the amount already refunded exceeds the refund determined on the regular assessment. The said interest is levied @ 0.5% on the whole or excess amount so refunded for every month or part thereof from the date of grant of refund to the date of such regular assessment.