Just wanted to share.
My wife's and son's REP were about to expire (1st 5 years) and being a kiasu, I applied for their renewal 3 months ahead of the expiry date, in anticipation of having to wait for the approval process etc etc.
To my surprise, it was approved within seconds of submitting the online application and they now have a new REP valid for the next 5 years, but validity date now ending exactly 5 years from date of application. meaning to say, we lost the "3 months" because of my overzealous good intention to apply early!
Just sharing for those who are about to do their REP renewals and having the same idea as me ie to apply much earlier within the 3 months before expiry.