Indirect taxes are referred to as ‘expenditure’ taxes since they are incurred when income is spent, unlike DIRECT TAXES, such as INCOME TAX, which are incurred when ‘income’ is received.
Changes in indirect tax can be used as part of fiscal policy to regulate the level of AGGREGATE DEMAND, increases in tax serving to reduce disposable income available for consumption spending, while decreases in tax increase disposable income. Indirect taxes can be used to affect the shape of demand as well as its level, increases in indirect tax serving to discourage consumption of socially disapproved products like cigarettes or alcoholic drinks, while reductions in indirect taxes encourage consumption of socially approved products like basic foodstuffs or books.
Unlike a DIRECT TAX, which varies according to the income of the taxpayer (PROGRESSIVE TAXATION), indirect taxes are regressive, insofar as the same amount is paid by each taxpaying consumer regardless of income. See TAXATION, REGRESSIVE TAXATION, INCIDENCE OF TAXATION.