Sadie Sink's salary for Season 5 of Stranger Things is not publicly available.
Celebrity salaries are often kept confidential by production companies and actors' representatives.
However, we can make some educated guesses based on Sink's previous earnings and her rising popularity.
In the early seasons of Stranger Things, Sink's salary was likely significantly lower than it is now.
As her role has become more prominent and she has gained wider recognition, her salary has likely increased.
It's reasonable to assume that Sink is now earning a substantial salary for her role in Stranger Things, potentially in the millions of dollars per season.
However, without official confirmation, it's impossible to say for sure how much she is being paid.