Chad Johnson says Ja'Marr Chase's wallet is about to be a whole lot fatter ... telling TMZ Sports he's sure Cincinnati is going to give the wideout a new contract worth "north of" $40 million PER YEAR!!
Chase, of course, has been looking for a redone deal from the Bengals for a while ... but now that he's officially entering his final season before free agency, Johnson tells us a fat payday is near.

Ochocinco says if the Bengals had gotten it done before this past season, they could have paid him roughly $30-$35 million a season.