The retirement wave that workforce demographers have been forecasting for the better part of a decade has, by the latest analysis of Bureau of Labor Statistics Current Population Survey data, arrived. Twenty-three point two percent of the US workforce is now 55 or older, up 17.3 percent over the last decade against just 11.7 percent overall workforce growth. The 65-and-older cohort has grown more than 40 percent in the same window. Some occupations now report 30 to 50 percent of staff within sight of retirement age.

The new MyPerfectResume Workforce Aging Report, the source of the freshly aggregated numbers, frames the moment as a transition that HR leaders can no longer treat as a future planning exercise. “This is no longer a future issue,” Jasmine Escalera of MyPerfectResume said in the report”s release commentary. Vicki Salemi of Monster pushed the message harder, calling on HR leaders to map roles holding concentrated tacit knowledge and stand up structured cross-generational mentorship before the exit waves hit.

The trickier part of the moment is the lag. Older workers are staying in the workforce later than the demographic curves predicted, primarily because the financial conditions for retirement have tightened. Inflation, healthcare costs, and the rising cost of living have kept a meaningful share of the 55-and-over cohort employed past what would historically have been their retirement window. That buffer is real but finite. When it expires, the exit cohort will be larger than the structural absorption capacity of the workforce that remains.

For HR leaders, three questions are now operational rather than strategic. First, which roles inside the organization hold the tacit knowledge that does not survive an unstructured retirement, and what is the documentation and mentorship plan for each? Second, what is the realistic timeline for replacement-or-redesign of those roles, and does the organization have the bench depth to absorb the work? Third, what is the policy posture on phased retirement, knowledge-transfer compensation, and contingent rehiring of recent retirees — all of which are mechanisms the most prepared organizations are now using.

For workforce-planning, succession, and knowledge-management software vendors, the moment has quantified the addressable problem in ways that were previously hard to defend. Workday, ServiceNow, Phenom, Lattice, and the broader category of HR-tech vendors targeting succession and skills-mapping now have a clear story to tell about why the budget should be approved this year, not the year after.

What to watch over the next twelve months: how the major employers in concentrated-knowledge industries — utilities, federal government contractors, manufacturing — manage the transition publicly, and whether any catalyzing event accelerates the exit pace from gradual to sudden.

Reporting based on the MyPerfectResume Workforce Aging Report and Tom Starner”s coverage at HR Executive.