Tax: a compulsory contribution to state revenue, levied by the government on workers' income and business profits, or added to the cost of some goods, services, and transactions.
Tax base: the total income, property, assets, consumption, transactions, or other economic activities subject to taxation within a jurisdiction.
Tax brackets: the ranges of taxable income or profits, to which different rates of income tax apply.
Sales tax: a tax on sales or on the receipts from sales.
International revenue services, IRS: the revenue service of the United States federal government, responsible for collecting taxes and enforcing tax laws.
Payroll tax: a tax that is levied on wages and salaries by the government.
Excise tax: a tax on specific goods or services, such as alcohol, tobacco, and gasoline.
Gas tax: a tax on gasoline or other fuel used for transportation.
Property tax: a tax on real estate or personal property.
Progressive tax: a tax in which the tax rate increases as the taxable amount increases.
Regressive tax: a tax in which the tax rate decreases as the taxable amount increases.
Tax wage: the amount of an individual's income that is subject to taxation.
Externality: a cost or benefit that affects a party who did not choose to incur that cost or benefit.