Sherman's fine was confirmed by the league Friday.
Sherman was flagged after he made a choking gesture toward the San Francisco bench that he said was directed at quarterback Colin Kaepernick. Sherman had just deflected a pass intended for Michael Crabtree in the end zone that was intercepted by linebacker Malcolm Smith and clinched Seattle's 23-17 victory.
Sherman ran over, and after tapping Crabtree on the backside and extending his hand for a handshake. Crabtree then shoved Sherman in the face. The All-Pro cornerback then made the choking gesture.
Sherman was the only player fined in the game.
NFL commissioner Roger Goodell already had shared his displeasure with Sherman's postgame rant.
"No, I'm not cheering for that," Goodell said on "CBS This Morning" on Thursday, referring to comments Sherman made. "(Sherman) is such a great young man. He is extremely well-spoken, does great things off the field, obviously a great player on the field. I want him to present himself in the best possible way and make sure that he is reflecting on himself and his family in a positive way."
Immediately following the game, Sherman was interviewed on Fox Sports and was asked to describe the play.
"I'm the best corner in the game,'' Sherman said, yelling. "When you try me with a sorry receiver like Crabtree, that's the result you're gonna get. Don't you ever talk about me."
Sherman then was asked who was talking about him.
"Crabtree," he said. "Don't you open your mouth about the best, or I'm gonna shut it for you real quick."
Sherman said on Wednesday that his postgame comments Sunday were ''misdirected and immature," but he is not a villain or a thug.
Information from The Associated Press was used in this report.