S.C. Code Ann. § 11-5-60: County treasurer to be charged interest for refusal or neglecting to pay taxes.

If any treasurer shall refuse or neglect to pay the taxes received by him within the time required by law, the State Treasurer shall, in addition to the coercive power which he now possesses, charge the county treasurer with interest, at the rate of five per cent per month, from the time he ought to have paid the taxes to the time of payment.