The 'RIP' singer has said that she will "never say never" to the idea, but that it is a "no" for the time being.
"There were talks," Ora told The Mirror. "But if I were to take on that role, it would have to be at a point when I could give it my full attention.
"I have so much to accomplish first and it's kind of a full-time job being on X Factor. It's not like a nine to five. It's constant, for months."
Ora appeared as a guest judge on the show in the 2012 series, and has reportedly been negotiating a full-time role over the past few months.
['The X Factor' 2012 judging panel: Gary Barlow, Nicole Scherzinger, Tulisa Contostavlos and Louis Walsh]
"Not that I have anything against it," Ora added. "I love it, but if I was to take on a full-time role it would be at a point when I'm loads of albums in.
"Being a guest is easier – you can say, 'Yes' to people and not have to mentor them."
Ora's negotiations to become a new judge could indicate that at least one of the current panel will be leaving the show in 2013.
Tulisa Contostavlos recently dismissed claims that she had quit The X Factor upon hearing that Nicole Scherzinger had already been asked to return.
Sharon Osbourne was also recently rumoured to be making a return, while Gary Barlow has hinted that he wants to focus on Take That.
'The X Factor' tour 2013 - photo gallery: