@shreem I have a bit idea that if you open your own PPF account and also on behalf of minor child then the combined limit shall be maximum Rs.1.5 lakhs only. So, Total deposit i.e. For self+minor should not exceed Rs.1.5 lakhs a year. But, since you are thinking to contribute from HUF to minor account, so rules might vary for that. You need to check with the respective bank regarding that.