Leno will continue to host The Tonight Show for two more years, ending on May 2014, reports Wall Street Journal.
However, NBC's entertainment chief Robert Greenblatt isn't sure exactly when Leno will permanently leave the late night programme.
"That's a conversation we'll have as we look down the road," Greenblatt said. "I'm sure there will be a day when these guys - Letterman and Leno - wake up and say, 'It's time for us to exit gracefully'."
Back in August, the talkshow laid off 20 employees from its production staff.
Leno was said to have taken a "tremendous" pay cut in order to keep as many people in their jobs as he could.
NBC has now confirmed that Leno took a 50% salary cut as part of the network's decision to slash The Tonight Show's budget.
The pay cut put Leno's $30 million salary to around $15 million, and helped NBC reduce the programme's "$100 million annual budget by about 20%".
Greenblatt assured fans that the budget cut won't affect the show's quality.
"We are just going to work harder and more efficiently," he told WSJ. "Our job is to be sure that none of this shows up on screen.
"Our biggest challenge is the change in viewing habits. We fight daily the DVR and online viewing, but we show up to work five days a week to make the show as topical, newsworthy, relatable and funny as possible."
Watch a clip from The Tonight Show with Jay Leno below: