Hayden joins the Rs as a free agent, having had a spell on-loan at Loftus Road two seasons ago.
“It’s fantastic,” he said. “It was special to have the conversation with Christian (Nourry) and the head coach (Julien Stéphan) in terms of them wanting me back at the club.
“I had a few options to go abroad, but it was one of those where if I was going to stay in the Championship, it was only going to be one club and I'm just glad to get it done.”
The 30 year-old also said: "This year especially for me is a big one.
“With Jamaica we’ve got the potential for a World Cup at the end of the season, six massive games to try and qualify. But obviously for me to play for them, I need to be playing football at a good level.
“I want to try and play as much as possible. Everyone thinks you hit the big 3-0 and it's downhill from there. But I do feel like I’ve got so much more in me.”
Along with Hayden, QPR also signed on Monday defender Rhys Norrington-Davies on a season-long loan from Sheffield United and brought back Koki Saito on a permanent deal from Belgian side Lommel.