The short answer is that it depends. However, in general, it can cost between $25-$225 to make a car key. Pricing can depend on the time of day, type of key fob, your location, if the key is a transponder or not, if all your keys are lost, if this is a second key being added on-site, and many more options. To get a firm and honest quote, please call XG Lock N Key today. We're a mobile locksmith in Ann Arbor, Michigan.