I've seen and paid employer health benefits bills- $15K-$24K is the range depending on the quality of healthplans.

About 10-25% of this is what employees pay as their part of the premium normally, the rest is employer paid. Stingier companies cover 75% of the employee cost and 50% of dependents cost.

"Annual premiums reached $18,764 for 2017, up 3 percent from 2015 for an average family coverage"

http://www.ncsl.org/research/health/health-insurance-premium...

"According to the KFF 2016 survey, the average family coverage premium is $18,412 per year and single coverage is $6,435 per year."

https://www.groupmgmt.com/blog/post/2017/09/05/How-Group-Hea...