An excise, or excise tax, is any duty on manufactured goods that is normally levied at the moment of manufacture for internal consumption rather than at sale. It is therefore a fee that must be paid in order to consume certain products. Excises are often associated with customs duties, which are levied on pre-existing goods when they cross a designated border in a specific direction; customs are levied on goods that become taxable items at the border, while excise is levied on goods that came into existence inland.

A sales tax is a tax paid to a governing body for the sales of certain goods and services. Usually laws allow the seller to collect funds for the tax from the consumer at the point of purchase.