Reference Number: 
CTAS-933

The National Institute of Governmental Purchasing defines a sole source purchase as “a contract for the purchase of goods and services entered into after soliciting and negotiating with only one source, usually because of the technology or uniqueness required.”1

Sole source purchases are goods and services available from only one supplier. There may be just one vendor because of patents or copyrights or simply because the vendor is the only one which supplies the good or service.2  These types of purchases should require written justification and documentation (e.g., is the product available from only one source and not merchandised through wholesalers, jobbers, or retailers or is the product or service unique and easily established as one of a kind?).3

The County Purchasing Law of 1983 contains a provision exempting sole source purchases of goods or services from competitive bidding in counties that are governed by this law.  Under T.C.A. § 5-14-204, the person authorizing a sole source purchase is required to make a record specifying the items purchased, the amount paid, and from whom the items were purchased, and this information must be reported to the county mayor and the county legislative body.

The County Financial Management System of 1981 defines "biddable items" in T.C.A. § 5-21-120 as any need of the county where more than one bidder or contractor in the county's trade area can provide the material or service, but any specific requirements for the purchase of sole source items would be found in the local  purchasing policies and procedures in counties governed by that law.   Counties operating under the County Purchasing Law of 1957 should also look to their local policies and procedures for guidance on sole source purchases.


            1National Institute of Governmental Purchasing, Public Purchasing and Materials Management, (Reston, VA : 1983),  28.

            2ibid, 50.

            3George Street, County Purchasing, The University of Tennessee, CTAS, 38.