The U.S.income tax system is completely indexed to the CPI.

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The U.S. income tax system is not completely indexed to the CPI (Consumer Price Index). While some aspects of the tax code, such as the standard deduction and tax brackets, are adjusted annually for inflation using the CPI, many other tax provisions are not indexed to inflation. This means that as prices rise, taxpayers may effectively be paying a higher tax rate on their income.

The USIncome Tax System Is Completely Indexed to the CPI