Age is the biggest factor. Not having a spouse or kids is a factor. Not hiring someone recovering from cancer or other health conditions could save on insurance.

This policy is in other countries without employer health insurance. For example Rebel.com has that policy in Canada. Health insurance costs as the only reason is not true for every company doing this.

> Age is the biggest factor. Not having a spouse or kids is a factor. Not hiring someone recovering from cancer or other health conditions could save on insurance.

It's impractical to refuse to hire single people and illegal to refuse to hire people based on their age or health conditions. You can't even ask about age.

> Health insurance costs as the only reason is not true for every company doing this.

Smokers get sick more and miss more work[1].

1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2598486/

Same could be said about being overweight or having health preconditions.

It's illegal for the company to ask people about their health preconditions and illegal to hire based on them.

40% of the US is overweight, so no company is going to have a policy that they won't hire overweight people.