Interest under section 234A is levied for delay in filing the return of income. In other words, if the taxpayer files the return of income after the due date specified in this regard, interest under section 234A will be levied. Rate of interest : Interest under section 234A is levied for delay in filing the return of income. Interest is levied at 1% per month or part of a month. The nature of interest is simple interest. In other words, the taxpayer is liable to pay simple interest at 1% per month or part of a month for delay in filing the return of income. Period of levy of interest under section 234A : Interest under section 234A is levied from the period commencing on the date immediately following the due date of filing the return of income and ending on the date of furnishing the return of income, or in case where no return has been furnished, on the date of completion of the assessment under section 144. It should be noted that while computing the period of levy of interest, part i.e. fraction of a month is considered as full month. Amount liable to interest under section 234A