Tenn. Code Ann. § 8-27-504

For the purpose of financing such insurance programs, the county may bear the expense of such coverages, as the county legislative body or other governing body of the county shall so determine, up to an amount equaling one hundred percent (100%) of the cost of such program, and the participating employees and officials shall have deducted from their salaries an amount which will be sufficient to pay the remainder of the cost for the coverage.