Percival is enjoying an impressive season in the top division and has become hugely popular with the squad and fans alike at Sixways.
The former England U21 Grand Slam winner is in his second spell with the club and would love to help bring Heineken Cup rugby to Worcester.
"The reason I came back to Worcester was to achieve things here," Percival said. "We've been moving forward as a club and I want to be here when we are winning things, playing Heineken Cup rugby and moving up the league table.
"This is not a stepping stone for me - Worcester has always been my boyhood club and I wouldn't want to be anywhere else.
"We are going forward and the atmosphere in the club is the best I've known it. It's a genuinely exciting time and I'm pleased to commit and continue to be a part of that."
Coach Richard Hill added: "Percy has been a fantastic acquisition and has a superb attitude. He is extremely passionate about the club, having been here before, and he is one of the senior players who will drive the ambition of the club."
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The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
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Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
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The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
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The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.
