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What is state tax apportionment and how do you calculate it?

ThomsonReuters

tax differ in that allocation covers non-business income, while apportionment covers business income. For example, if 50% of a company’s payroll, 50% of its property, and 20% of its sales are in New Mexico , the state would be able to tax 40% of the firm’s net earnings. Allocation and apportionment in U.S.