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Here’s What it Takes to Sue For Gender Pay Discrimination—and Win
It's not easy, but it can be done. · Fortune

Pay equality has become a hot topic, bandied about by CEOs, presidential candidates, and even A-list actors. But while the Obama administration has attempted to increase transparency and strengthen the laws around wage disparities, women continue to be paid less than their male counterparts--and continue to have difficulty proving that that’s the case.

Pay discrimination based on sex has long been illegal. Both the Equal Pay Act of 1963 (EPA) and Title VII of the Civil Rights Act of 1964 prohibit paying someone less for the same work because of gender. But it can be tough to prove, says labor and employment attorney Ryan D. Barack with Kwall, Showers, Barack & Chilson in Clearwater, Florida. Barack should know: He successfully represented former Citicorp service center manager Heidi Wilson in a gender-based wage discrimination case against Citicorp North America, a subsidiary of Citibank.

Wilson was paid $75,329 when she was promoted to manage a Tampa service center. However, her male predecessor was paid more than $129,000 the year before, according to a report in the Tampa Bay Times. In 2011, she was bypassed for another raise and objected. Shortly thereafter she was fired without severance and took the case to court. In 2012, Wilson won the case--and was awarded nearly $340,000 in back pay.

Unfortunately, Wilson’s case is unusually straight forward, says Barack. Her job was identical to the one held by her predecessor, so once the wage disparity was revealed, the inequity was clear. It's rarely so easy to prove, he says.

Proving Unequal Pay

In FY 2015, the Equal Employment Opportunity Commission (EEOC) received 973 equal wage discrimination complaints, a number that’s held relatively steady since 1997. Yet just a faction of these complaints go beyond the initial filing. Last year, the 64% percent of complaints received by the EEOC were found to have "no reasonable cause" for action.

Part of the reason these cases can be so difficult to prove, says Debra Lawrence, a regional attorney in the EEOC Philadelphia District Office, is the four affirmative defenses built into the Equal Pay Act. If there’s a disparity in pay, an employer must prove that it’s justified by:

  • A seniority system

  • A merit system

  • A pay system based on quantity or quality of output

  • Any other factor other than sex

While the first three factors are pretty straight forward, that last "catch-all" category is where employers get creative, says Lawrence. They may say the higher paid employee has more experience or training, or that he was simply a better negotiator. In addition, just obtaining the salary information to show the pay differential can be difficult--especially when employees are discouraged from discussing what they're paid.