The good news comes on top of 13 new episodes already completed and set to air next year.
Melissa Bergland, Virginia Gay, Katherine Hicks, Zoe Tuckwell-Smith and Melanie Vallejo will all return.
The Bevan Lee-created drama, launched in 2011, was one of the top five local dramas on television this year.
Seven’s Head of Drama, Julie McGauran said, “Winners & Losers is a show everyone loves working on. The contemporary vibe allows for great storytelling against a backdrop everyone can relate to.
“There’s so much in store for our favourite girls as we follow them through triumph, tragedy and everything in between.”
A 9 month production is due to commence in Melbourne in early 2014.