I mean, you're gonna have to buy another carseat whenever baby exceeds the heigh/weight limit on your rear facing one, it just depends on if you wanna get a convertible on then or just turn him forward facing which I'm pretty sure is what I'll be doing

@london1010, at around 10 months when he outgrew his car seat

i face my babys forward when theyr around 1 year old. maybe just a little before that. but its known to be safest that way. ive seen a lot of people face then forward way earlier. but i wait until mine are closer to atleast 1.