The fourth quarter is here. Retailers are finalizing inventory. Restaurants are staffing up for seasonal demand. Contractors are pushing to finish projects before winter. Professional service firms are measuring revenue goals against a shrinking calendar.

A Health Savings Account (HSA) is one of the most tax-efficient accounts in the Internal Revenue Code. It helps people with high-deductible health plans save for medical costs with favorable tax treatment — but it's more than a medical-spending account. For many taxpayers, it also works as a long-term wealth-building tool and a supplemental retirement account.

Hiring feels like growth. More people, more capacity, more momentum. But here's what most business owners underestimate: the salary is just the starting point.