Friday, February 22, 2013
Analyst in Public Finance
Every tax filer has the option to claim deductions when filing their income tax return. Deductions serve four main purposes in the tax code: (1) to account for large, unusual, and necessary personal expenditures, such as extraordinary medical expenses; (2) to encourage certain types of activities, such as homeownership and charitable contributions; (3) to ease the burden of taxes paid to state and local governments; and (4) to adjust for the expenses of earning income, such as unreimbursed employee expenses.
Some tax deductions can be taken by individuals even if they do not itemize. These deductions are commonly referred to as above-the-line deductions, because they reduce a tax filer’s adjusted gross income (AGI, or the line). In contrast, itemized and standard deductions are referred to as below-the-line deductions, because they are applied after AGI is calculated to arrive at taxable income.
Tax filers have the option to claim either a standard deduction or to itemize certain deductions. The standard deduction, which is based on filing status, is, among other things, intended to reduce the complexity of paying taxes, as it requires no additional documentation. Alternatively, tax filers claiming itemized deductions must list each item separately on their tax return and be able to provide documentation that the expenditures being deducted have been made. Only tax filers with deductions that can be itemized in excess of the standard deduction find it worthwhile to itemize. Whichever deduction the tax filer claims—standard or itemized—the amount is subtracted from AGI.
Deductions differ from other tax provisions that can reduce a tax filer’s final tax liability. Deductions reduce final tax liability by a percentage of the amount deducted, because deductions are calculated before applicable marginal income tax rates. In contrast, tax credits generally reduce an individual’s tax liability directly, on a dollar-for-dollar basis, because they are incorporated into tax calculations after marginal tax rates are applied.
Some deductions can only be claimed if they meet or exceed minimum threshold amounts (usually a certain percentage of AGI) in order to simplify tax administration and compliance. In addition, some deductions are subject to a cap (also known as a ceiling) in benefits or eligibility. Caps are meant to reduce the extent that tax provisions can distort economic behavior, limit revenue losses, or reduce the availability of the deduction to higher-income tax filers.
Because some tax filers and policymakers may not have detailed knowledge of tax deductions, this report first describes what they are, how they vary in their effects on reducing taxable income, and how they differ from other provisions (e.g., exclusions or credits). Next, a discussion concerning the rationale for deductions as part of the tax code is provided. Because some deductions are classified as tax expenditures, or losses in federal revenue, they might be of interest to Congress from a budgetary perspective. The final section of this report includes tables that summarize each individual tax deduction, under current law. Many of these deductions are part of the permanent income tax code. The American Taxpayer and Relief Act of 2012 (P.L. 112- 240) extended several temporary provisions through 2012 and 2013.
Date of Report: February 5, 2013
Number of Pages: 25
Order Number: R42872
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