After going through the attached PDF file in Ankit's reply, what I have gathered, I am putting it through an example. If my interpretation is wrong please point it out.
For an individual (less than 60yrs.). The taxable income as on 31/3 is say Rs.10 lacs. The total tax liability is Rs.1,30,000.0 (Cess not taken for simplicity).
If the person had not paid any advance tax as on 15/9 , 15/12 and on 15/3 but paid Rs. 30,000.0 as advance tax as on 25/3, the instances of penalty on non payment of adv. tax on or before the due dates will be as follows-
a) Since by 15/3 90% of tax(90% of Rs.1,30,000 =Rs.1,17,000) was not paid. There will be an interest payable of 1% on (Rs.1,17,000-Rs.30,000) Rs.87,000.
b) As adv tax of 30% of total tax, ie (30% of Rs.1,30,000) Rs. 39,000 was not paid by 15/9, interest @ 1% per month on Rs.39,000 will be payable for 3 months, ie Rs.Rs.1170.
c) As adv tax of 60% of total tax, ie(60% of Rs.1,30,000) Rs.78,000 was not paid by 15/12, interest @ 1% per month on Rs.78,000 will be payable for 3 months, ie Rs.2340
Hope I am getting it right. Please let me know.