The 22-year-old actor, who has been dating Vanessa Hudgens for five years, was asked by Extra's Terri Seymour about rumours that he is planning a proposal.
"No, I'm not gonna get married for a while. I think I've always said I'm not gonna get married until I'm 30 at least. I'm gonna wait," he replied.
"I wouldn't want that kind of commitment or pressure at this point, and once you do that, where do you go from there? It's going to be even more pressure... I'm not sure, I try not to think about it."
Efron - who met Hudgens on the set of High School Musical - recently dismissed speculation that he had been seen shopping for an engagement ring.
His new movie Charlie St. Cloud opens next week.