Personal Exemption (federal income tax)

United States Federal Income Tax Personal Exemption

A deduction for a Personal Exemption amount for the individual taxpayer, the taxpayer's spouse, and the taxpayer's child or other dependent for purposes of calculating a U.S. taxpayer's federal income tax is provided in the Internal Revenue Code at . The personal exemption is allowed in the form of a deduction against the taxpayer's income in the computation to arrive at the taxable income amount against which the tax rates are applied to compute the income tax under .


When Congress enacted Section 151 of the Internal Revenue Code, it did so believing that a certain level of income, “personal exemptions,” should not be subject to the federal income tax. Congress reasoned that the level of income insulated from taxation under §151 should roughly correspond to the minimal amount of money someone would need to get by at a subsistence level (i.e., enough money for food, clothes, shelter, etc.).

The amount listed in §151 (see below), even adjusted for inflation, may seem inadequate for a taxpayer to subsist on. It is important to remember however, that in addition to personal exemptions, taxpayers may claim other deductions that further reduce the level of gross income subject to taxation.

Generally speaking, taxpayers may claim a personal exemption for themselves, §151(b), and their qualifying dependents, §151(c). A personal exemption may also be claimed for a spouse if (1) the couple files separately, (2) the spouse has no gross income, and (3) the spouse is not the dependent of another, §151(b). For taxpayers filing a joint return with their spouse, the IRS Regulations allow two personal exemptions as well, §1.151-1(b).

In computing their taxable income, taxpayers may claim all personal exemptions they are eligible for under §151, and deduct that amount from their adjusted gross income. The size of the personal exemption a taxpayer may take each year is adjusted for inflation.


The tax deduction for personal tax exemptions begins to be phased out if AGI exceeds $234,600 for 2007 joint tax returns and $156,400 for 2007 single tax returns ($225,750 for 2006 joint tax returns and $150,500 for 2006 single tax returns). Each tax exemption is reduced by 2% for each $2,500 by which your AGI exceeds the threshold amount until the benefit of all tax exemptions is eliminated on your tax return. Tax exemptions are completely phased out for single tax return filers with an AGI of more than $278,900 in 2007 ($273,000 in 2006) and joint tax return filers with AGI of more than $357,100 in 2007 ($348,250 in 2006).

Who is a dependent

Section 152 of the code contains nuanced requirements that must be met before taxpayer can claim another as a dependent for personal exemption purposes. The general rule is that a personal exemption may be taken for a dependent that is either a qualifying child or a qualifying relative. § 152(a). However, there are several exceptions to this rule.

Taxpayers that are claimed as dependents of others cannot themselves claim personal exemptions for their qualifying dependents. § 152(b)(1). Married individuals that file joint returns cannot also be claimed as dependents of another taxpayer. § 152(b)(2). Citizens or nationals of other countries cannot be claimed as dependents unless they also reside in the U.S. or in contiguous countries. § 152(b)(3). However, taxpayers who are also U.S. citizens or nationals may claim as a dependent any child that shares the taxpayer’s abode and is a member of the taxpayer’s household. Id.

Qualifying Children as Dependents

Qualifying children must first be “children” in the sense of § 152(f)(1). The term “children” includes adopted children, children placed for adoption, stepchildren, and foster children. Id. Qualifying children must have the same principal place of abode as the taxpayer for more than one-half of the year and must not have provided more than one-half of their own support. § 152(c)(1). They can include a taxpayer’s children, a taxpayer’s siblings, half-siblings, or step siblings, or the descendants of a taxpayer’s children, siblings, half-siblings, or step siblings. §§ 152(c)(2), (f)(4). They may not have reached the age of 19 by the close of the year, unless they are students, in which case they must not have reached the age of 24, or unless they are permanently and totally disabled. § 152(c)(3).

A child cannot qualify as a dependent on more than one tax return, so the code has a set of rules to prevent this from happening. § 152(c)(4). The code first attempts to break the tie by limiting eligible taxpayers to the child’s parents, followed by the contending non-parental taxpayer with the highest adjusted gross income. Id. If more than one parent attempts to claim the child and they do not file a joint return, the code first attempts to break the tie in favor of the parent with whom the child resided longest during the taxable year. Id. If that does not break the tie, the parent with the highest adjusted gross income wins the right to claim the child as a dependent. Id.

For the treatment of children of divorced parents, see § 152(e). For the case where children are missing and presumed kidnapped, see § 152(f)(6).

Other Qualifying Relatives as Dependents

A qualifying relative cannot be the qualifying child of any taxpayer. § 152(d)(1). The individual must have gross income less than the amount of the personal exemption. Id. The taxpayer must have provided over one-half of the individual’s support. Id.

The allowable relationships between the taxpayer and the qualifying relative are almost innumerable, but under no circumstances can the relationship be one that violates local law. §§ 152(d)(2), (f)(3). Included are children (in the broad sense of § 152(f)(1)), descendants of children, siblings, half-siblings, step-siblings, father, mother, ancestors of parents, stepparents, nieces, nephews, various in-laws, or any other non-spousal individual sharing the taxpayer’s abode and household. § 152(d)(2).

Special rules dealing with multiple support agreements, handicapped dependents, and child support are detailed at § 152(d)(3)-(5).


The personal exemption amount in 1894 was $4,000 ($80,000 in 2005 dollars). That tax was declared unconstitutional in 1895. The tax in its present form which began around 1913 had a personal exemption amount of $3,000 ($57,000 in 2005 dollars), or $4,000 for married couples.

Over time the amount of the exemption has increased and decreased depending on political policy and the need for tax revenue. Since the Depression, the exemption has increased steadily, but not enough to keep up with inflation.

The exemption amounts for years 1987 through 2008 are as follows:

Tax YearDeduction Amount


  • Years 1987 through 2006, Internal Revenue Service, Instructions for Form 1040 (for each listed year)
  • Year 2007, Internal Revenue Service, Rev. Proc. 2006-53 (Nov. 9, 2006).
  • Year 1913 and 1894, , American History section
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