Service tax interest

Dear All,

Kindly confirm me that, i have not paid service tax payment on 06/11/2016, now today we want to pay last month service tax and also pay for current month service tax. 

Please confime me that how many days interest will pay on last month, if i pay today that interest will pay even for one month or two month.

Anyone please guide me as soon as possible, because today is last date of Service Tax payment.

Thanks in advance

Rajesh Verma