What is a Series EE Bond

The Series EE Bond is a non-marketable, interest-bearing U.S. government savings bond that's guaranteed to at least double in value, over the typical 20-year initial term. Some Series EE bonds have total interest-paying lives that extend beyond the original maturity date, up to 30 years from issuance. Coupon rates are determined based on the percentage of the long-term Treasury rates, at the time of issuance. Series EE bonds are often referred to as "Patriot Bonds".


Along with the Series I bond, the Series EE bond is one of the two types of savings bonds issued by the US Treasury. Series EE bonds cannot be bought or sold in the open market, and are hence classified as non-marketable securities.

Series EE bonds issued after May 2005 are assigned semi-annual fixed coupon rates on May 1 and November 1. The rates apply to all issuances for the ensuing six months. Bonds issued after each date increase in value monthly, but interest payments are handed out semiannually.

Key Takeaways

  • Series EE Bonds are interest-bearing U.S. government savings bond guaranteed to at least double in value over their typical 20 year initial terms.
  • Some Series EE bonds pay interest beyond the original maturity date, up to 30 years from issuance. 
  • There is $25 minimum investment requirement for EE bonds. 
  • Every investor may purchase up to $10,000 in these bonds, per calendar year. 

Paper EE bonds were re-issued as "Patriot Bonds" after the September 11, 2001 terrorist attacks. They are identical in every way to the paper Series EE Bonds except that any paper bonds purchased through a financial institution after December 10, 2001 have the words "Patriot Bond" printed on the top half of the bond certificate, situated between the Social Security Number (SSN) and the issue date. Financial institutions no longer issue Series EE bonds in paper form, but the paper Patriot Bonds can still be cashed or converted into electronic bonds. 

There is $25 minimum investment requirement for EE bonds, and each investor may purchase up to $10,000 in these bonds, per calendar year. Furthermore, bondholders must hold onto these investments for at least twelve months, before they can redeem the bonds. Those who redeem bonds within five years will be docked three months of accrued interest payments. Since EE bonds earn interest for up to 30 years, the longer they're held, the more they're worth.

Paper bonds were issued at a 50% discount to par, while bonds electronically sourced through TreasuryDirect are purchased at face value. The latter are still guaranteed to be worth twice their original value at first maturity date after 20 years, while paying interest the same way as paper EE bonds.

Series EE bonds are considered ultra-safe, low-risk investments, whose interest is typically exempt from state and local taxes. However they are subject to federal taxes, but only in the year in which the bond matures or is redeemed.

EE Bonds may be purchased by US citizens, official US residents, minors, and all US government employees--regardless of their citizenship status.

[Important: Series EE bonds don't need to be reissued to correct small typographical errors in names, addresses, or Social Security numbers.]