With two weeks to go, Paykan edged past visiting team Pas Hamedan thanks to a late goal from Abbas Mohammad Rezaei.
Paykan was relegated from IPL last season.
Pas almost was relegated to the Iran's second division after suffering the defeat.
Three teams will win promotion to IPL.
Mashin Sazi Tabriz, Sanat Naft Abadan and Fajr Sepasi Shiraz will also have a chance to promote.