Star Tyger Drew-Honey previously suggested to DS that the show's fifth series would be its last.
However, a representative for the show has stated: "Hat Trick are filming an Outnumbered Christmas special in November and series 5 later next year," adding that "no decision" has been made on the show's future beyond that.
It was announced in June that the popular BBC family comedy would return for a Christmas special and a new series in 2013.
Drew-Honey originally told Digital Spy: "This series is the last series. Never say never, but the directors and writers have said that they don't want to do another. Some [shows] do go on too long and some of them are just making [more] series for the sake of it."
The actor - who plays eldest child Jake - added that the gap between Outnumbered's fourth series in 2011 and the show's final 2013 run will allow "more scope for storylines".
"Outnumbered hasn't been on in ages now... and series five isn't going to be out till next May," he explained. "They've purposely made a point of holding it off - with the ages that Dan [Roche, who plays Ben] and Ramona [Marquez, who plays Karen] are now, they can take advantage of the fact that from the last time they were seen on TV to now, they've changed so much.
"If it was just six months later, it's all the same kinds of storylines. In series one, I was considered 'the old one', getting my first girlfriend, now Ben might be having a girlfriend. So they wanted to allow it enough time, so they'd have more scope for storylines."
Tyger Drew-Honey will next be seen in BBC Three comedy Cuckoo opposite Greg Davies, Helen Baxendale and Andy Samberg. The series is expected to premiere later this month.
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Watch a clip from the fourth series of Outnumbered below: