Ad valorem
Main article: Ad valorem
An ad valorem tax is one where the tax base is the value of a good, service, or property. Sales taxes, tariffs, property taxes, inheritance taxes, and value added taxes are different types of ad valorem tax. An ad valorem tax is typically imposed at the time of a transaction (sales tax or value added tax (VAT)) but it may be imposed on an annual basis (property tax) or in connection with another significant event (inheritance tax or tariffs). An alternative to ad valorem taxation is an excise tax, where the tax base is the quantity of something, regardless of its price. For example, in the United Kingdom, a tax is collected on the sale of alcoholic drinks that is calculated by volume and beverage type, rather than the price of the drink.