Abstract: A meter beater timer is provided which alerts the user when a pre-determined time interval has expired so that he can return to the meter and deposit additional coins if necessary. Unlike previous timers, the user is reminded to set the timer when he withdraws the ignition key from the ignition. The key is attached to a key ring and to a key chain which retracts into the timer housing when the key is removed from the ignition depressing a plunger which sets off an alarm. An electronic version and a mechanical version are provided.