Progressive Taxation
What does "Progressive Taxation" mean in law?
Progressive taxation is a rate structure in which the marginal tax rate increases as the taxable income base rises, so that higher-income taxpayers pay a larger percentage of their income in tax. The U.S. federal income tax employs a progressive system with graduated brackets under IRC Section 1, currently ranging from 10% to 37% for individuals. A critical distinction exists between the marginal tax rate (the rate on the last dollar of income) and the effective tax rate (total tax divided by total income), and students must understand that moving into a higher bracket does not retroactively increase the rate on income in lower brackets. Progressive taxation is the structural counterpart to regressive taxes (like sales taxes) and proportional taxes (flat rates), and its policy justifications include the ability-to-pay principle and diminishing marginal utility of income.
Definition
Progressive taxation is a rate structure in which the marginal tax rate increases as the taxable income base rises, so that higher-income taxpayers pay a larger percentage of their income in tax. The U.S. federal income tax employs a progressive system with graduated brackets under IRC Section 1, currently ranging from 10% to 37% for individuals. A critical distinction exists between the marginal tax rate (the rate on the last dollar of income) and the effective tax rate (total tax divided by total income), and students must understand that moving into a higher bracket does not retroactively increase the rate on income in lower brackets. Progressive taxation is the structural counterpart to regressive taxes (like sales taxes) and proportional taxes (flat rates), and its policy justifications include the ability-to-pay principle and diminishing marginal utility of income.
Example
A single filer with $100,000 in taxable income does not pay 24% on all $100,000; rather, the first $11,600 is taxed at 10%, the next portion at 12%, and so on through the brackets, resulting in an effective rate lower than the 24% marginal rate.