How It Works
Savings bonds come in either paper or electronic form and can be purchased from most financial institutions or via the {ia_ext|U.S. Treasury's|http://www.treasurydirect.gov} TreasuryDirect website. U.S. citizens, official U.S. residents, and U.S. government employees (regardless of their citizenship status) can buy and own savings bonds. Minors can also own savings bonds.
Paper EE bonds are sold at 50% of face value, meaning that the investor pays $50 for a $100 bond and the bond is not worth its face value until it matures. Electronic EE Bonds are sold at face value, meaning the investor pays $50 for a $50 bond. Electronic EE Bonds can be purchased in any amount over $25. I Bonds are sold at face value (i.e., a $100 bond costs $100). Like EE Bonds, the minimum investment is $25, and investors who purchase I Bonds electronically can buy in any amount above $25.
Investors can only purchase paper savings bonds in $50, $75, $100, $200, $500, $1,000, $5,000, and $10,000 increments, and they may purchase up to $30,000 worth of savings bonds in one year.
When a savings bond matures, the investor receives the face value of the bond plus accrued interest. Savings bonds are not redeemable for the first 12 months they’re outstanding, and investors who redeem within the first five years forfeit the last three months of interest as a penalty.
Below are the basic components of a paper savings bond.

Interest Payments
Savings bonds are zero-coupon bonds in that they earn interest monthly but do not pay that interest until they mature or are redeemed. The interest compounds semiannually.
EE Bonds issued after May 2005 carry a fixed interest rate equal to 90% of the average market yield on five-year Treasuries during the six months before the EE Bond’s issue. The Bureau of Public Debt rate on May 1 and November 1.
I Bonds pay a fixed rate plus an inflation rate based on the CPI for Urban Consumers (CPI-U). The rate changes twice a year and offers some protection against lost purchasing power. This structure is what primarily distinguishes I Bonds from EE Bonds. The Bureau of Public Debt announces the bond rates in May and November.
Taxation
Interest from savings bonds is exempt from state and local taxes. It is subject to federal tax, however, but only in the year in which the bond matures or is redeemed. The holder may choose to pay taxes each year on the interest earned in that year, but the disadvantage to this is that the taxpayer must then pay taxes on accrued interest from any other investments as well.
Savings bond interest can be exempt from federal taxes if the investor redeems savings bonds and pays tuition for himself or a dependent in the same year. This exemption is called the Education Savings Bond Program, and there are eligibility requirements, so be sure to consult a qualified tax professional before investing.