The Relationship between Base, Rate,
and Revenue
Taxes are usually characterized by reference to their
base. A tax base is an item, occurrence, transaction,
or activity with respect to which a tax is levied. Tax
bases are usually expressed in monetary terms. For
instance, real property taxes are levied on the
ownership of land and buildings, and the dollar value
of the property is the tax base. When designing a tax,
governments try to identify tax bases that taxpayers
cannot easily avoid or conceal. In this respect, real
property is an excellent tax base because it cannot
be moved or hidden, and its ownership is a matter of
public record.