Savings bonds have a low-risk, low-reward structure that benefits patient investors. See what to consider before investing.

Series HH. Series HH savings bonds were issued from 1980 to 2004 and had a maturity date of 20 years, so some of these bonds are still earning interest until 2024.

HH bonds only exist in paper form and come in four denominations: $500, $1,000, $5,000 or $10,000. To cash one in, you'll need to follow the same steps for cashing in a paper EE or I bond.

HH bonds. HH savings bonds were sold from 1980 through August 2004. They earn interest for up to 20 years. So the last HH bonds will stop earning interest in 2024.

Series HH Bonds were last issued in 2004 and the last of this series stops earning interest in 2024. Series EE Bond Maturity Dates When you buy bonds , it’s good to know when they will mature.

“The ability to convert E or EE bonds to another type of bond, called HH bonds, was a strategy that existed until 2004 as a way to further defer accrued interest,” he said.

Like the owner of any other E or EE bond, the owner of E and EE bonds acquired from a decedent could exchange them for Series HH bonds (or H bonds before 1980 – but see Editor’s Note, below ...

“The ability to convert E or EE bonds to another type of bond, called HH bonds, was a strategy that existed until 2004 as a way to further defer accrued interest,” he said.