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Average Marginal Income Tax Rates by Adjusted Gross Income and Filing Status, August 25, 2005 1 (August 25, 2005)

handle is hein.tera/crstax0275 and id is 1 raw text is: Order Code RS22229
August 25, 2005
CRS Report for Congress
Received through the CRS Web
Average Marginal Income Tax Rates by
Adjusted Gross Income and Filing Status
Steven Maguire
Analyst in Public Finance
Government and Finance Division
Summary
This report presents average marginal income tax rates by filing status and detailed
adjusted gross income (AGI) class for the 2001 tax year, the most recent year for which
data are available. The source of data is the 2001 Internal Revenue Service (IRS) public
use micro-sample. A general finding is that the average marginal tax rates by filing
status begin to converge with AGI above $75,000. Below that amount, married
taxpayers filing joint returns had significantly lower average marginal tax rates. This
report will be updated when new data are released.
Overview
This report provides a rough approximation of the marginal tax rate faced by
taxpayers of different income levels by filing status, e.g., single, married filing joint,
married filing separate, and head of household in 2001. Statutory rates (the rates in the
income tax code) are often termed marginal tax rates because they represent the amount
of tax due on the last dollar earned. For example, a single taxpayer with net taxable
income of $60,000 would be in the 25% statutory tax bracket and would pay 25 cents in
taxes for the next dollar earned above $60,000. Policymakers and researchers are
interested in marginal tax rates because they are the rates that influence taxpayers
decisions to work or invest. A higher marginal tax rate reduces the incentive to earn more
through work or investments.
The 2001 tax cuts contained in the Economic Growth and Tax Relief Reconciliation
Act (P.L. 107-16, EGTRRA) reduced the higher marginal tax rates and expanded the
taxable income brackets for married taxpayers filingjoint returns. Congress believed that
these tax cuts were necessary because of (1) the projected federal budget surpluses; (2)
high marginal rates that reduced the ...incentives for taxpayers to work, save, and to

Congressional Research Service 4- The Library of Congress

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