Interest on service tax mar 2016

Kiran (M.Com) (112 Points)

05 April 2016  
Dear All , Due date for payment for service tax for Mar 16 is 31.03.2016 & i have done the payment on 31st except some invoices for which i am making the payment today , can any1 confirm me that whether interest @ 15 % p.a.will be applicable or not ?