A small step toward tax equality for same-sex couples

Three IRS rulings the rulings will lower the tax burden for many same-sex couples. But the changes don’t address a host of other ways in which same-sex couples face less-favorable tax treatment.

A trio of recent IRS rulings (here, here, and here) has rekindled debate on how our tax system should treat same-sex couples.

Under the Defense of Marriage Act, the federal government does not recognize same-sex marriages. As one consequence, same-sex couples must file individual tax returns even if they are married or registered as domestic partners under state law.

The new rulings were prompted by a 2007 California law that requires registered domestic partners to treat their earnings and some investment returns as common property for state tax purposes. Under this approach, the partners share equally in their combined income, regardless of which partner earned it. If one partner earned $50,000 and the other nothing, for example, they would each be viewed as having $25,000 of income.

Because “federal tax law generally respects state property law characterizations and definitions,” the IRS decided to apply that approach to federal taxes. As a result, domestic partners in California (most of whom are same-sex couples) will each report half their combined income from earnings or community property on their individual federal tax returns.

That approach will lower the tax burden for many eligible same-sex couples. For example, if one partner earns $50,000 per year and the other has no earnings, the couple’s combined federal tax bill would fall from about $6,000 to $3,000 (assuming they have no children). That decline is identical to the “marriage bonus” that the federal tax code currently provides to heterosexual married couples at that income level.

For that reason, some commentators have characterized the rulings as tax equality for same-sex couples (e.g., the Wall Street Journal ran the headline “Gay Couples Get Equal Tax Treatment”). But that interpretation exaggerates the impact of the rulings and understates the differences in taxation between same-sex and heterosexual couples.

First, the rulings apply only in states with these community property rules for same-sex partners. According to the WSJ, besides California, only Nevada and Washington might currently be affected.

Second, same-sex partners still can’t file joint returns. As a result, their tax burdens can differ from those of otherwise identical heterosexual couples. For example, one domestic partner might have investment income from assets that are not community property and thus are not shared with the other partner. Depending on their income, that can result in the same-sex couple paying more or less than a heterosexual couple.

Dividing income under the community property approach may also allow same-sex couples with high incomes to pay less in federal taxes than heterosexual couples. For example, a same-sex couple that earns $300,000 would pay about $66,000 in tax under the new ruling, while a heterosexual married couple would pay about $78,000.

Finally, the rulings don’t address a host of other ways in which same-sex couples face less-favorable tax treatment. At a recent TPC event, for example, Michael Steinberger of Pomona College noted that same-sex couples can face significantly higher estate taxes because they aren’t eligible for tax-free bequests to spouses.

For all these reasons, same-sex couples and heterosexual couples still aren’t treated the same under the tax code. The recent IRS rulings narrow the gap in some cases, but create new gaps in others. Given the complexities of our tax code, separate treatment will inevitably mean that some same-sex couples will pay more or less in taxes than comparable heterosexual couples do. If policymakers ever want same-sex couples to be taxed the same as heterosexual couples, the only practical way to do so would be to allow same-sex couples to file their tax returns as married couples.

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