Howard Stern is leaving Sirius XM when his five-year contract expires.

Howard Stern told his satellite radio listeners on Thursday that he is “pretty sure” he is leaving Sirius XM when his $500 million contract expires at the end of the year. Stern said he’s not leaving the radio business, though, “hinting towards a possible mobile application and a low monthly fee,” according to a report by Orbitcast, a website that covers the satellite radio industry.

Orbitcast noted, it was “some of the strongest language” used by Stern this year when talking about his future plans. The self-proclaimed “King of All Media” also hinted at the option of taking his show to a mobile platform, where users would pay a “low monthly fee.”

He said Sirius is pushing for another five-year contract, while he wants something shorter. It’s also likely that Sirius, which not too long ago had been on the brink of bankruptcy, won’t come close to the $500 million figure it lobbed to lure Stern away from terrestrial radio.

Earlier this year, Stern was said to be in talks to become a judge on “American Idol,” but no offer materialized. Stern has also said he’s had discussions about returning to the terrestrial airwaves, though he doubts that would happen.

Insiders say a decision on Stern’s future is expected to be made prior to Sirius XM’s third quarter earnings call in November. Stern added that he would tell his radio listeners first.