Electronic Series EE savings bonds, purchased via TreasuryDirect, are sold at face value. For example, you pay $25 for a $25 bond. For example, you pay $25 for a $25 bond. Paper EE bonds, last sold in 2011, were sold at half of face value. Rates & Terms. Series EE bonds issued May 2005 and after earn a fixed rate of interest. EE bonds purchased between May 1997 and April 30, 2005, earn a variable rate of interest. Interest is added to an EE bond monthly and paid when you cash the bond. Paper bonds were sold at half the face value; i.e., you paid $25 for a $50 bond. Series E Bonds, sold as war bonds, were issued in denominations between $25 and $10,000. A war bond, initially known as defense bond, is a debt instrument issued by a government as a means of borrowing money to finance its defense initiatives and military efforts during times of war.