The right-hander was 13-11 with a 4.02 ERA in his first season with the Dodgers.
Last month, Haren guaranteed the option for the big payday by going seven innings in a loss to the San Francisco Giants, who won the World Series.
"I've pitched good enough to deserve that," he said at the time. "It's a ton of money."
At that point in September, he wasn't sure whether he would return next year.
Last week, the 34-year-old pitcher had arthroscopic surgery on his left shoulder to clean out bursitis and the AC joint. The team said he is expected to be ready by spring training.