States raise revenue and provide a service when offering to personalize license plates. To determine the revenuE-maximizing price and the marginal deadweight loss per dollar of net revenue, one must estimate both the slope and shift factors of the demand for vanity license plates. Shift factors include the percentage of special background plates sales (price of a complement), the requirement of front and back license plates (preferences), the age distribution (population), and income. Each $1 increase in the annual cost of owning a vanity plate reduces the final percentage of all plates personalized by 0.08%. At least ten states continue to charge a price exceeding the revenuE-maximizing level. Many other states raise funds whose marginal social cost exceeds marginal net revenue by over 100%.