Windass insists he never wanted to leave City but the extra security will not see his performances tail off.
He told the club's website: "When I turned down the Wigan offer, the club said they would reward me and they have done.
"They wanted me to stay and I wanted to stay. I love playing for Bradford and now hopefully I can play a big part in helping them get promoted and push on from there.
"It was flattering to get an offer from a Premiership club at my age but I never wanted to leave in the first place. But I won't be resting on my laurels now; I've got a job to finish here."