Rule 7(c) provides that
Where the return prescribed under rule 7 is furnished after the date prescribed for submission of such return, the person liable to furnish the said return shall pay to the credit of the Central Government, for the period of delay of-
(i) fifteen days from the date prescribed for submission of such return, an amount of five hundred rupees;
(ii) beyond fifteen days but not later than thirty days from the date prescribed for submission of such return, an amount of one thousand rupees; and
(iii) beyond thirty days from the date prescribed for submission of such return an amount of one thousand rupees plus one hundred rupees for every day from the thirty first day till the date of furnishing the said return:
Provided that the total amount payable in terms of this rule, for delayed submission of return, shall not exceed the amount specified in section 70 of the Act:
Provided further that where the assessee has paid the amount as prescribed under this rule for delayed submission of return, the proceedings, if any, in respect of such delayed submission of return shall be deemed to be concluded.
The late fee does not amount to penalty. It is calculated as per the delayed time in filing the return. The said late fee can be waived only if the gross service tax payable is NIL, at the discretion of the authorities.