The list, released Thursday, states that Parsons earned $27.5 million in the year leading up to June 1.
Parsons, who makes $1 million per episode of "The Big Bang Theory" along with the other principal stars, came out on top due to his endorsement deal with Intel, role in Oscar-nominated film "Hidden Figures" and time on Sirius radio.
Parsons previously came in at No. 1 in 2016 having earned $25.5 million.
"The Big Bang Theory's" cast dominates the rest of the top four with Galecki in second place with $26.5 million, Helberg in third with $26 million and Nayyar in fourth with $25 million.
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