The cheapest smog test in Las Vegas, Nevada, varies over time and by site. The Nevada Department of Motor Vehicle sets a maximum fee level that privately owned emissions testing facilities may charge; as of 2015, this ranged from $40 to $45.50, depending on location and type of vehicle.
Smog Busters, for example, is a chain of commercial smog testing facilities located throughout the Las Vegas metro area; as of 2015, it charges $17.99 or more for an automobile emissions test. Generally speaking, smog testing sites throughout Las Vegas vie for business by lowering prices compared to competitors. The Nevada DMV regulates this process by requiring testing stations to submit written requests prior to changing emission test prices. Smog testing facilities are also required to post fees for customers.