Tenn. Code Ann. § 7-3-403: Deposit of wages - Charges for board

(a) When inmates are employed and participating in this program, the sheriff or the sheriff's designees shall require that inmates turn wages and salaries over to the sheriff or the sheriff's designees when received and the sheriff or the sheriff's designees shall deposit such money in trust accounts. Ledgers shall be maintained reflecting the status of individual accounts.

(b) Each inmate shall be liable for reasonable charges for board as fixed by law.