Cornerstone Bancorp has laid the groundwork for three banking branches in northwestern South Carolina. The institution is the holding company for Cornerstone National Bank, which offers traditional products and services, including checking and savings accounts, money market accounts, CDs, and credit cards. Commercial real estate loans comprise the largest portion of its lending portfolio; other offerings include residential mortgages, business and industrial loans, real estate construction, and consumer loans. Cornerstone National Bank has three offices in Easley, Greenville, and Powdersville, South Carolina. Cornerstone Bancorp also has an insurance agency that operates as Crescent Financial Services.