Robert Downey Jr. — $500,000 for “Iron Man” (2008)
Yeah, Marvel got RDJ cheap in 2008 (following box-office milestones for the first "Iron Man," Downey's end pay was $2.5 million). An Oscar-nominated actor and arguably one of the best of his era, Downey Jr. was still repairing his career following a tough stint with substance abuse at the time he was cast in the movie that would launch the MCU. And he has been rewarded since, earning $50 million for the first "Avengers" movie, $80 million for "Avengers: Age of Ultron," and $10 million for the handful of scenes in "Spider-Man: Homecoming."
Chris Evans — $1 million for “Captain America: The First Avenger” (2011)
Evans got more than his fellow Chris on his first outing because he had better name recognition when he agreed to play Steve Rogers. In fact, he had already played a superhero. He was Johnny Storm in the early 2000s version of the "Fantastic Four" franchise. And since "Captain America: Civil War," like Hemsworth, he's been scoring $15 million checks.
Chadwick Boseman — $2 million for “Black Panther” (2017)
By Disney standards, starting out at $2 million isn't bad. And being part of one of the biggest Marvel hits of all time meant Boseman got a nice bonus. He'll definitely be looking at bigger pay days playing T'Challa going forward.
Scarlett Johansson — $15 million for Untitled Black Widow Movie (TBA)
It sure was a long time coming. After seven movies (counting "Endgame") in the MCU, Johansson's character finally gets a standalone movie, which is currently in early stages. And because of that Disney is going to give her a worthy contract. She earned a low seven-figure check starring in the first "Avengers" movie.
Moral of the story: the longer you stay in the MCU, the more you'll eventually make.