When do savings bonds mature?

Savings bonds mature at the end of the loan period, which has a limit of 30 years, according to the U.S. Department of Treasury. Investors are also able to redeem the bond's face value plus any earned interest 12 months after purchase.

The Treasury Department reports that the cheapest savings bonds can be purchased for $25 as of 2014. In addition, the TreasuryDirect website sells digital bonds, following the discontinuation of paper bonds. Savings bonds can also be purchased on a recurring basis by direct deposit through an employer and by opening a TreasuryDirect account. The Treasury Department encourages savings bonds to be given as gifts.