In the UK, the INLAND REVENUE assesses and collects taxes on behalf of the government for a fiscal year from 6 April to 5 April the following year.
Ideally, a progressive income tax structure should promote social equity by redistributing income but also encourage enterprise and initiative by avoiding penal rates of taxation at the upper end of the scale and, together with the SOCIAL SECURITY provisions, provide suitable incentives to work at the lower end of the scale. See DISTRIBUTION OF INCOME.
Changes in income tax rates 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. Income taxes can also be used to affect the distribution of incomes in society in line with the government's social policy In the UK, there are currently (2005/06) three taxable income bands (that is, income after deduction of tax allowances): taxable income up to £2,090 is taxed at 10%; £2,091 to £32,400 is taxed at 22%, and above £32,401 it is taxed at 40%. See TAXATION, PRINCIPLES OF TAXATION, INCOME TAX SCHEDULES.
A tax on income. A simple concept, but one that requires thousands of pages of IRS statutes, regulations, revenue rulings, and court interpretations to explain. See the IRS Web site at www.irs.gov.