The Motherhood Penalty Is a Number. Here It Is.

The two resumes are the same resume. Same degree, same title, same accomplishments, same font. The difference is one line. One candidate coordinates the Parent-Teacher Association. The other raises money for her neighborhood association. The hiring committee does not think of itself as biased. Committees never do. It simply notices, somewhere below the level of argument, that one of these equally qualified women is a mother. And then it offers her eleven thousand dollars less. That is not a metaphor. It is a finding, and it has a page number. The experiment that caught it happening In 2007 the sociologist Shelley Correll and her colleagues ran the two-resume test both ways. In the laboratory version, evaluators reviewing matched candidates recommended a starting salary of $151,000 for the childless woman and $139,000 for the mother, a 7.9 percent haircut applied to a single line of volunteer work, and on the way down they rated the mother less competent and less committed. Then the researchers sent the same paired applications to real employers with real openings and counted callbacks. Childless women heard back about twice as often as mothers did. The fathers are the tell. In the same studies, men were not penalized for parenthood, and on some measures they benefited from it. If the penalty were about parenting, it would land on parents. It lands on mothers, and it runs in reverse for their husbands. Across the research, fathers collect a wage premium for the same life event that discounts their wives, and the effect is consistent enough that economists gave it a name of its own. The ledger, printed plainly The title promised numbers, so here they are, in their three most careful forms. Per child: in the research that defined the field, the sociologists Michelle Budig and Paula England found that mothers earn about 7 percent less per child, and about 5 percent less per child after controlling for work experience. Read that second number again. The penalty survives the she-took-time-off explanation. Most of it was never about hours logged. Per career: in modern US data, mothers’ earnings fall roughly 30 percent relative to their prior trajectory in the five to ten years after a first birth, and long-run estimates run higher. Fathers’ earnings, same household, same baby, barely move. And the premium: fatherhood adds a few percentage points to men’s wages in most studies, with one detail worth underlining. The premium shows up largest in firms without formalized performance evaluation. Where measurement is loose, a story fills the gap, and the story says fathers are providers and mothers are flight risks. Neither half of that story survives contact with an actual spreadsheet, which is rather the point of keeping one. So the mechanism is not mysterious, and it is not, mostly, about babies. It is a commitment story employers tell themselves in the absence of data, an assumption priced in before the woman in question has said one word about what she wants. The asterisk that matters Now the honest asterisk. Some women leave the workforce after a birth because they want to, eyes open, household arithmetic done, and that is not a penalty. It is a decision, and a serious one. Gaux has never graded women’s choices and is not starting today. The penalty is what happens to the woman who chose nothing of the kind. She came back at full throttle and got read as halfway out the door. Notice that the assumption manages to insult both women at once. The working mother is presumed less committed than she is, and the home-by-choice mother is presumed to have been priced out rather than to have decided. The number in this essay measures the assumption, not either woman’s math. What moves the number Here is where this stops being a lament, because the motherhood penalty behaves like a design flaw, and design flaws have documented fixes. Leave, designed well, pays for itself in continuity. When California launched the country’s first state paid family leave program, leave-taking by new mothers roughly doubled, and mothers of young children went on to work 10 to 17 percent more hours, with wage income rising by a similar amount. Keeping a trained person attached to her own career, it turns out, is worth money to everyone involved. One large technology company lengthened its paid maternity leave from 12 to 18 weeks and watched the rate at which new mothers quit fall by half. The employers with the best retention numbers in this story are not doing charity. They are doing arithmetic. Fathers’ leave is a mothers’ pay policy. When Quebec reserved leave weeks for fathers at decent wage replacement, fathers’ participation jumped by roughly 250 percent, about four in five Quebec fathers now take leave, and the division of labor at home stayed measurably more equal years afterward. A father on leave is a mother whose career does not absorb the entire shock of a new baby by default. Structure beats stories. Since the parenthood effects run largest where evaluation is loosest, the fix is almost embarrassingly available: written criteria, real performance data, salary bands, promotion processes that ask what a person did rather than what a committee assumes she will want next. The penalty is a judgment, and judgments can be given rails. The on-ramp can be built. Return-to-work programs, structured returnships for professionals re-entering after career breaks, have spread across banking, consulting, and technology precisely because employers keep finding that experienced returners are excellent hires. The logic is the resume experiment run in reverse. Replace the assumption with a working trial, and the assumption loses. And then there is the cheapest intervention on this list: a manager who treats a pregnancy announcement as a retention event. Who plans the leave and the next promotion in the same conversation. Who has read enough to know the commitment story is a story. There are more of these managers every year, and the companies that train for them are quietly collecting the women the rest of the market keeps mispricing, which is what markets eventually do with mispriced assets. The number is real. Print this, hand it to whoever owns your benefits budget, and notice the best part, which is that the number is already moving, everywhere someone decided to move it.