Every year, organisations invest heavily in developing women leaders. And yet, the senior leadership pipeline remains stubbornly thin.

The issue isn’t ambition.
It isn’t capability.
And it certainly isn’t commitment.

According to McKinsey & LeanIn’s landmark research Women in the Workplace—the largest longitudinal study on women’s careers—the real challenge lies in how women experience leadership transitions.

The “Broken Rung” Happens Early

The biggest drop-off for women doesn’t happen at the C-suite.
It happens at the very first promotion—from individual contributor to manager.

For every 100 men promoted to manager, significantly fewer women make the same move. That early gap compounds over time, shrinking the leadership pipeline long before senior roles come into play.

As Seniority Increases, Bias Increases

As women move into more senior roles, they face:

• Higher standards for performance

• More scrutiny and less margin for error

• Persistent double binds (be confident, but not “too” confident)

The result? Women are often perceived as “not quite ready,” even when their track records say otherwise.

Sponsorship, Not Mentorship, Is the Real Accelerator

The research is unequivocal: women are over-mentored and under-sponsored.

While mentorship builds skills, sponsorship creates opportunity—visibility, advocacy, and access to stretch roles. Men receive sponsorship earlier and more consistently; women are often expected to “earn it” over time.

Burnout Is a Leadership Risk

Women leaders carry disproportionate emotional labour—supporting teams, managing culture, and absorbing complexity—often without recognition. Unsurprisingly, women leaders report higher burnout than men at the same level, putting retention at risk right when organisations can least afford it.

What This Means for Organisations

The leadership gap is not a pipeline problem—it’s a transition problem.

Women don’t need more confidence workshops.
They need structured support at critical career moments, intentional sponsorship, and leadership systems designed to remove friction—not add to it.

Organisations that address these transition points don’t just advance women.
They build stronger, more resilient leadership benches overall.