It depends on how long it has been since your last flight.
IR renewal if done before it expires, is a straight forward process , which requires just an IR renewal checkride.
According to Operations circular 2 of 2004 (available on DGCA's website, under Rules -> Circulars -> Operations) if it has been more than 12 months since your last flight you will need to do a fam flight (by day or by night) lasting not less than 45 minutes, a day check and a night check and ofcourse the IR check plus a ground refresher on the type of a/c with a qualified AME/examiner (endorsement of the same has to be made in the log book.)
Hope this helps.