Kean was linked with a move back to Juventus all summer after struggling to make a mark at Everton in his first season in the Premier League.
The Italian did leave the Toffees by the end of the transfer window, but he crossed the English Channel to join French champions PSG on a season-long loan deal.
Kean is hoping to revive his career in the French capital this season but there were uncertainties over whether PSG have an option to make the move permanent.
There were suggestions that the deal was of a simple loan for the campaign, but according to French magazine France Football, PSG have also negotiated a purchase option.
It has been claimed that the French champions have the option to make the move permanent for a transfer fee of €20m.
It is unclear whether the option to buy clause is attached to Kean hitting any goals at PSG over the course of the season.
But there is a possibility that his move away from Everton to PSG could become permanent at the end of the 2020/21 campaign.
Everton paid around €30m to snare Kean away from Juventus last year but the young Italian flattered to deceive in England.
