According to Fox Sports’ NRL 360 program, the trio are each paid $1.2 million, which is roughly £638,800, per season.
The figures includes club salaries, third party agreements and the marquee player allowance.
Sam Burgess is the eighth highest paid player in the competition on $800,000 (£425,868). Foran and Burgess are the only two non-Australians on the list.
The top 10 earners in the NRL are as follows:
Johnathan Thurston $1.2 million
Kieran Foran $1.2 million
Billy Slater $1.2 million
Cameron Smith $1.1 million
Daly Cherry-Evans $1.1 million
Greg Inglis $900,000
Robbie Farah $900,000
Sam Burgess $800,000
Cooper Cronk $800,000
Josh Dugan $800,000