A regressive tax is one where the average tax burden decreases with income. Low-income taxpayers pay a disproportionate share of the tax burden, while middle- and high-income taxpayers shoulder a relatively small tax burden.| Tax Foundation
The tax base is the total amount of income, property, assets, consumption, transactions, or other economic activity subject to taxation by a tax authority. A narrow tax base is non-neutral and inefficient. A broad tax base reduces tax administration costs and allows more revenue to be raised at lower rates.| Tax Foundation
A corporate income tax (CIT) is levied by federal and state governments on business profits. Many companies are not subject to the CIT because they are taxed as pass-through businesses, with income reportable under the individual income tax.| Tax Foundation
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A progressive tax is one where the average tax burden increases with income. High-income families pay a disproportionate share of the tax burden, while low- and middle-income taxpayers shoulder a relatively small tax burden.| Tax Foundation