Their offer, confirmed by Clooney's spokesperson on Thursday, would provide the union an extra $150 million over three years and could help fund improved health benefits.
Clooney also said top stars would only collect residuals once lower-paid actors received theirs.
"A lot of the top earners want to be part of the solution," Clooney told Hollywood publication Deadline, which first reported the news. "We think it's fair for us to pay more into the union."
A SAG-AFTRA spokesperson did not immediately respond to a request for comment.
It'd be a beautiful thing if the top Hollywood stars showed some real solidarity and started/used their own production companies to give SAG-AFTRA a fair deal and make some creative, original films. It'd probably scare big studios knowing there was money being made that they weren't getting their cut of.