The Broncos squad for next season is being filled in at pace, with veteran prop Corey Jensen also signing for an extra two years this week to keep him on board until 2027.
The club did have more cap space open up after middle forward Kobe Hetherington inked a four-year deal with Manly from next year after he appeared set to stay at Brisbane in 2026.
Paix had made it clear all year he did not want to leave, but it has been a roller-coaster season. He began as starting hooker before being moved to the bench and then dropped once Ben Hunt switched from the halves to No.9
When Hunt was moved to No.7 after injury to captain Adam Reynolds, the stoic Paix got his hooking spot back.
His extension means the Broncos will be flush with rakes next season, with Ben Hunt, Blake Mozer, Billy Walters, Paix and highly rated young gun Cameron Bukowski on the books.
Paix has been a solid performer and a good luck charm. The Broncos have won all eight games when he has started since round 14.
The qualified carpenter's tackle efficiency of 97.6 per cent gives the Broncos steel in the middle of the park, which they are going to need against the red-hot Raiders in the qualifying final in Canberra on Sunday.
Paix, with 64 NRL games for the Broncos to his credit, has received a boost on the cusp of finals.
Last year he did not play a game of NRL and his career appeared stalled, but he's glad he stayed at the club in what was his final year under contract, rather than take an opportunity elsewhere.
"I didn't think I'd ever get back to the NRL, but I always had faith, stuck to my processes and relied on my hard work to put me back in the frame," Paix said.
"I've got to say it was challenging, but I'm thankful that I got through those times.
"I've still got plenty to give, and plenty to go as a player and a person."
Football operations boss Troy Thomson said Paix, who was identified as a junior by the Broncos when 13, was made of the right stuff.
"He's an important member of the squad and is always looking for ways to develop his craft as a hooker," Thomson said.
"He is well-liked among the group, always has a smile on his face and brings a cheeky energy that lifts those around him."