In California, sales taxes are made up of various state, county and city taxes. The state tax is "imposed upon all retailers" for the "privilege of selling tangible personal property at retail". Strictly speaking, only the retailer is responsible for the payment of the tax; when a retailer adds this tax to the purchase price, the consumer is merely reimbursing the retailer by contractual agreement. When consumers purchase goods from out-of-state (in which case the seller owes no tax to California) the consumer is required to pay a "use tax" identical to the sales tax. Use tax is levied upon the "storage, use, or other consumption in this state of tangible personal property". Consumers are responsible for declaring these purchases in the same filing as their annual state income tax, but it is rare for them to do so. An exception is out-of-state purchase of automobiles. Then, use tax is collected by the state as part of registering the vehicle in California.