Economic Definition of proportional tax. Defined.
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Term proportional tax Definition: A tax in which people pay the same percentage of income in taxes regardless of their incomes. Here's an example of a proportional tax -- You earn $10,000 a year and your boss gets $20,000. You pay $1,000 in taxes (10 percent) and your boss pays $2,000 in taxes (10 percent). While a proportional tax would seem to make a lot of sense, very few taxes are designed to be proportional and even fewer come out that way in practice. The reason is often attributable to the ongoing battle between the second and third estates. Each side wants the other to pay a larger share of taxes.