Floyd Mayweather is expecting a massive windfall later this month, when he faces off against UFC star Conor McGregor… of more than $300 million.

In “Episode 2” of the Mayweather-McGregor Showtime special, All Access, Floyd sits down and talks about his fortune… and how much it will grow come August 26th.

“I mean, am I the highest-paid athlete out there? And just coming back? We not talking about no contract. We not talking about no contract for no four years, or no contract for no five years. I can do it in 36 minutes. $300 (million) or better. In 36 minutes,” Mayweather boasts in the video.

From there, he breaks out a backpack full of cash, literally, and shows it off for the camera. “They call me Money Mayweather for a reason. I’mma get it, regardless. What else you guys wanna know,” he says.

While Mayweather is expecting a $300 million payday, McGregor is slated to make around $100 million in the superfight — the largest purse every for an MMA fighter.