S.C. Code Ann. § 5-31-1750

Upon default in the payment of any installment or deferred portion of any assessment, at the time and in accordance with the terms and conditions fixed by ordinance, the total amount of such assessment then unpaid, including deferred installments or payments and interest, shall immediately become due and collectible, at the option of the municipality, and shall be collectible as city or town taxes are collected, with such penalties and costs as are provided for the payment of such taxes.