"My act is going to run out fairly quickly. There's no question of that," the sharp-tongued American Idol judge, 44, said during a Q&A session at the International Television Festival in Edinburgh on Saturday, reports Reuters.
"I can do what I do on these shows, I can add some humor, some honesty, whatever, but I have no inclination to be doing this in five or 10 years time."
Not that Cowell is planning to retire any time soon. In Britain, where he also stars on Pop Idol (the original version of American Idol), he is planning to sit in judgment on a new show he is launching next month, called The X Factor. Sharon Osbourne also will be a judge.
The format is similar to American Idol's, except that the age limits are higher and musical groups may also compete. Auditions attracted about 45,000 hopefuls.
"I'm bored of just watching 22-year-olds coming onto a talent show and saying, 'Make me famous,'" Cowell said.
Asked whether The X Factor format would be imported to America, Cowell was uncharacteristically reticent, "We'll see," is all he said.