time is on somebody's side

time is on somebody’s ˈside

(also have time on your side) somebody has enough time to do something; the more that time passes, the more somebody will be helped: Although she failed the exam, time is on her side; she is young enough to take it again next year.The longer we wait to sell the house, the more it will be worth, so we’ve got time on our side.
See also: on, side, time