Transponder key programming is a service provided by locksmiths to program a transponder key for a vehicle. The cost of this service can vary widely based on the type and quality of the accessory, the complexity of the job, and the location and service provider. The average hourly cost for transponder key programming is around $100 per hour, with the cost breakdown typically including labor and parts. Factors that can affect the cost include the type of transponder key, the complexity of the job, and the service provider. The type of transponder key can range from basic to advanced, with advanced models typically costing more. The complexity of the job can also affect the cost, with more complex jobs requiring more time and expertise. The location of the service provider and the reputation of the service provider can also affect the cost. Generally, service providers in more populous areas tend to charge more than those in rural areas.