Employers are only beginning to catch up in benefit and leave offerings to support workers who care for aging relatives.

About 40 million U.S. adults each year provide support with basic functional, household, and medical or nursing tasks to aging family members, according to data from the National Alliance for Caregiving and the AARP. Nearly 35 percent of those caregivers are employed full time, while 25 percent are employed part time, and work and caregiving responsibilities can collide.

Lost in...