An excise tax is a tax on use or consumption of certain products. Excise taxes are sometimes included in the price of a product, such as motor fuels, cigarettes, and alcohol. Excise taxes may also be imposed on some activities, like gambling. Excise taxes may be imposed by the federal government or by a state.
Learn more about excise taxes: the kinds of products excise taxes are imposed on, and when they must be paid.
The IRS has information on excise taxes imposed on individuals and businesses.