The controversial French player said the 'F-word' seven times during a BBC interview following his first-round win over Giovanni Mpetshi Perricard.
Moutet initially swore unintentionally when asked about Mpetshi Perricard's massive serve, saying: "When he hits me at 142, I was like f***!"
He was warned by the interviewer to watch his language, to which a grinning Moutet uttered a further three expletives.
One final chance was given to Moutet, until he deliberately said "f*** f*** f***" three more times and the interview was cut short.
The ATP announced on Friday that Moutet has been hit with a $40,000 fine for "unsportsmanlike conduct" and "use of profane language during his post-match interview."
Moutet is planning to appeal the fine according to the ATP's rules.
He earned around £33,000 for reaching the second round, meaning the punishment has erased a significant chunk of his prize money for the week.
It equates to more than 90 per cent of his prize money, or around £4,300 per swear word used.
Moutet was eliminated in round two by Spain's Alejandro Davidovich Fokina in straight sets.