According to a new report released by PayScale, Inc., putting family first can be costly—literally.

PayScale’s “Inside the Gender Pay Gap” report examined data collected from approximately 1.4 million full-time U.S. employees between July 2013 and July 2015.

“One surprising and significant takeaway is that the more often a woman tells us that she prioritizes home or family obligations over work, the larger the controlled gender pay gap becomes, even when compared to men with similar characteristics who say they prioritize home and family over work with the same frequency,” says Katie Bardaro, vice president of Data Analytics and Lead Economist, PayScale. “The largest pay gap exists between married mothers and married fathers who indicate that they prioritize family over work obligations at least once a year. However, we see no pay gap at all between single men and women without children who say they never prioritize home and family over work.”

According to the survey results, married men earn the highest overall salaries ($67,900 for men with children; $60,800 for those without), and single moms have the lowest overall salaries, both uncontrolled ($38,200) and when controlled ($45,500) for all measured compensable factors such as experience and job.

Salaries continue to increase for men until they reach the age range of 50 to 55, with a median salary of $75,000, while salaries for women plateau much earlier, between the ages of 35 to 40, with a median salary of $49,000.

The survey also revealed that both the uncontrolled (20.7%) and controlled (1.4%) gender pay gaps in the tech industry are smaller than the pay gaps in other industries. This holds true for the controlled pay gap at all job levels except at the executive level, where the controlled gender pay gap for the tech industry is slightly larger than in nontech industries.

The full report can be found here.