Service tax late payment

ronak (M.Com) (55 Points)

28 February 2017  
Dear Sir, Service tax for the month of jan2017 is 100000 but still the date of 28-2-17 not paid to gov't so what is the interest rate paid and finally what amount i liable to pay. and one more thing if i pay service tax in 15-3-2017 so what payable amount