Study: Stay-at-Home Mom Worth Nearly $117,000 a Year

The eighth annual survey calculated a mom's market value by studying pay levels for 10 job titles with duties that a typical mom performs, ranging from housekeeper and day care center teacher to van driver, psychologist and chief executive officer.

the annual salary for a stay-at-home mom would be $116,805, while a working mom who also juggles an outside job would get $68,405 for her motherly duties.

The biggest driver of a mom's theoretical salary is the amount of overtime pay she'd receive for working more than 40 hours a week. The 18,000 moms surveyed about their typical week reported working 94.4 hours — meaning they'd be spending more than half their working hours on overtime.

"The rewards aren't monetary, but it's a reward knowing that they're safe and happy," Russell said of her sons. "It's worth it all."