An individual income tax (or personal income tax) is levied on the wages, salaries, investments, or other forms of income an individual or household earns. The U.S. imposes a progressive income tax where rates increase with income.

Corporate tax, also called corporation tax or company tax, is a type of direct tax levied on the income or capital of corporations and other similar legal entities. The tax is usually imposed at the national level, but it may also be imposed at state or local levels in some countries. Corporate taxes may be referred to as income tax or capital tax, depending on the nature of the tax.

Sales tax is levied on retail sales of goods and services and, ideally, should apply to all final consumption with few exemptions. Many governments exempt goods like groceries; base broadening, such as including groceries, could keep rates lower. A sales tax should exempt business-to-business transactions which, when taxed, cause tax pyramiding.

A payroll tax is a tax paid on the wages and salaries of employees to finance social insurance programs like Social Security, Medicare, and unemployment insurance. Payroll taxes are social insurance taxes that comprise 24.8 percent of combined federal, state, and local government revenue, the second largest source of that combined tax revenue.

Bookkeeping is the process of keeping track of a business's financial transactions. These services include recording what money comes into and flows out of a business, such as payments from customers and payments made to vendors.