If Sam Tomkins comes to the Warriors, he is set to be the highest paid player at Mt Smart.
It is believed the Wigan fullback, who was the Super League's Man of Steel (player of the year) last season, will command a base salary of more than $550,000 a season.
This would put him ahead of other big earners, which includes Manu Vatuvei, Simon Mannering, Feleti Mateo and Dane Nielsen.
Any deal for Tomkins would also be one of the biggest in the club's history, comparable to the large contracts of the past for such players as Dennis Betts, Andy Platt, Greg Alexander and Steve Price.
It is understood the Warriors would have to buy out part of Tomkins' Wigan deal, as he is contracted to the Lancashire club until 2016. This could add up to $200,000 a year to the cost.