Speaking in the latest issue of Doctor Who Magazine (485), Steven Moffat has discussed the future of Doctor Who.

In the 'Ten Years At The Top' feature, which celebrates the past 10 years, Moffat confirmed that the show will continue for at least another 5 years:

"I thought it would last ten years. I didn't think it would last ten years with Worldwide trying to get me in a room to talk about their plan for the next five years! So it's going to do a minimum of 15. I mean, it could do 26!"

[Source: Doctor Who Magazine]