Sutherland was recently named the highest-earning actor in a drama series by TV Guide magazine, netting $550,000 for every outing as action man Bauer.
But programming bosses at Fox admit the show's eighth season could be its last.
TV executive Kevin Reilly tells the New York Post, "It's our last contractual season of 24. There are a lot of moving parts, so we're not sure what will happen after that.
"It's going to come down to a business decision. It's not an inexpensive show on the network books and we also want to finish strong. This is not a show we want to prop up... We haven't made any decision whether it's back or not."
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