Economic Definition of marginal tax rate. Defined.
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Term marginal tax rate Definition: A tax rate that is the percentage of an incremental change in the tax base paid in taxes. Comparable to any marginal, this is the change in total taxes collected or paid divided by the change in the total value of the tax base. For example, if a person has a $10,000 increase in earnings from $40,000 to $50,000 and income taxes increase by $2,000 from $3,000 to $5,000 in taxes, then the marginal income tax rate is 20 percent. The contrasting term is average tax rate.
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