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Abstract
The tax code limits the extent to which individuals may take advantage of the tax benefits associated with traditional and Roth IRAs. The only eligibility criteria for contributing to a Roth IRA are income and filing status. In contrast, eligibility for deducting contributions to a traditional IRA depends on those factors as well as on whether the taxpayer and the taxpayer’s spouse participate in an employer-provided pension. Taxpayers are subject to an assortment of phaseout ranges based on those criteria.
Introduction
The tax code limits the extent to which individuals
may take advantage of the tax benefits associated with
traditional and Roth IRAs. The only eligibility criteria for
contributing to a Roth IRA are income and filing status.
In contrast, eligibility for deducting contributions to a
traditional IRA depends on those factors as well as on
whether the taxpayer and the taxpayer’s spouse participate
in an employer-provided pension. Taxpayers are
subject to an assortment of phaseout ranges based on
those criteria. For example, in 2007 the traditional IRA
phaseout range for a married taxpayer begins at $83,000
if the married taxpayer participates in an employer
pension, and $156,000 if she does not but her spouse
does. No income limits apply for eligible contributions to
a traditional IRA if neither spouse participates in an
employer pension, while the eligibility phaseout range
for contributions to a Roth IRA begins at $156,000.
Single taxpayers and heads of household face a different
set of eligibility rules. Like joint filers, those without
access to an employer pension have no income limit on
the deductibility of contributions to a traditional IRA. In
contrast, those with access to a pension face declining
limits on deductible IRAs
when their income exceeds
$52,000 and on Roth IRAs
when their income exceeds
$99,000. Married taxpayers
filing separately face much
stricter eligibility criteria than
other filing types. Like other
taxpayers, they may deduct
contributions to IRAs if neither
spouse participates in an
employer pension. However,
their ability to contribute to
either traditional or Roth
IRAs phases out between zero
and $10,000 of income if either
spouse has a pension.
Those disparate sets of eligibility
criteria mean that
some taxpayers may contribute
to a Roth IRA but may not
deduct contributions to a traditional
IRA; other taxpayers face the opposite situation.
Of course, some taxpayers may participate in both types
of IRA accounts, while others qualify for neither. Typically,
a taxpayer who may make deductible contributions
to a traditional IRA, but may not contribute to a Roth
IRA, lacks access to an employer pension but has too
much income to participate in a Roth IRA. Conversely, a
taxpayer who may contribute to a Roth IRA but not to a
traditional account is likely to have access to an employer
pension but to have income below the Roth IRA limit. In
2007 about 82 percent of all taxpayers were eligible for
both types of IRAs, 10 percent for a Roth IRA only, 3
percent for a traditional IRA only, and 5 percent for
neither.
Joint filers are less likely to be eligible to participate in
both types of IRAs relative to single taxpayers, but are
more likely to be only eligible to contribute to a Roth IRA.
About 75 percent of married filers may participate in
both types of IRAs, compared with 90 percent of single
filers. The difference likely results from the higher incomes
of married taxpayers combined with the increased
likelihood that at least one spouse has access to a
pension. Joint filers are more than twice as likely as single
filers to be unable to qualify for either a traditional or
Roth IRA: 5 percent of married taxpayers filing jointly
face that situation, compared with about 2 percent of
single filers.

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Disclaimer: The nonpartisan Urban Institute publishes studies, reports, and books on timely topics worthy of public consideration. The views expressed are those of the authors and should not be attributed to the Urban Institute, its trustees, or its funders.