Iniesta's current contract with Barca expires in June 2015, but the midfielder has hinted he may stay longer if his form allows him to.
"Leaving doesn't even cross my mind right now because I'm in the best place I could ever be," Iniesta told FIFA.com. "That said, it'll be my performances that decide how long I carry on.
"The day that I don't feel I can give 100 per cent [I'll stop], because I wouldn't want to cheat the club."
With Barcelona currently clear atop the La Liga standings, Iniesta is confident his side can reclaim the domestic title, and push for Champions League glory.
"In 2012 we were right on the verge of where we needed to be to win things, but we just fell a little short," he explained. "This year we'll use that as an incentive to fight for every trophy once more.
"At Barca, we're always expected to fight for every title and that's what we did. And we've gone all the way in other years, even though we fell short last time."