It had been heavily rumoured that Couric was close to signing a deal with ABC to launch a new syndicated daily show in September, after both NBC and CBS bowed out of a bidding war for the high-profile newsreader.
In addition to fronting the new talkshow, Couric is also expected to contribute to ABC News across several different newscasts.
"It's no slam-dunk she's going to be a success," Horizon Media's Brad Adgate said, according to The Hollywood Reporter. "You cannot expect her despite her fame or recognition to automatically succeed.
"Other famous people that have tried to do talkshows have not come out with the ratings expectations they had hoped for."
The announcement of a new daytime talkshow will come less than a month after Oprah Winfrey ended her show after 25 years on the air.
Couric served as co-anchor for NBC's Today between 1991 and 2006, following which she hosted CBS Evening News for five years until her departure in May.