How much does an ignition interlock device cost? According to the Wisconsin Department of Transportation, these devices are not cheap. After adding up the cost of an average installation, monthly maintenance, and removal of the device, you will be looking at an annual cost of at least $895.
Wisconsin Act 100 asserts that installation of an ignition interlock device in each vehicle you own is required in the event of: a subsequent OWI offense, a first time OWI offense if your BAC is .15 or greater, and if you refuse chemical testing during a traffic stop.