Billionaire Tom Golisano, a three-time candidate for the New York statehouse, is about to enter the race to buy the Buffalo Bills, The Post has learned.

The 72-year-old founder of Paychex plans to make an offer early next week, two sources close to the situation said.

Golisano, the former owner of the Buffalo Sabres, would be the fourth bidder for the NFL franchise — which is expected to set a league sales price record at north of $1.2 billion.

The estate of the late Bills owner Ralph Wilson Jr. wants to create more competition and will welcome a Golisano bid even though it will arrive up to six days after the deadline, sources said.

Golisano has long been interested in sports and athletes.

A former resident of suburban Rochester, NY, about 80 miles east of Buffalo, Golisano, who now lives in Naples, Fla., in June announced his engagement to 40-year-old tennis superstar Monica Seles.

Golisano also bid unsuccessfully in 2012 for the Los Angeles Dodgers.

In his expected bid for the Bills, who have never won a Super Bowl, Golisano will be facing off against Terrence Pegula, to whom he sold the Sabres in 2011.

Donald Trump and a group of Toronto sports team owners fronted by rocker Jon Bon Jovi have also bid for the team.

Golisano could not be reached for comment.