31 CFR § 359.56
How can I find out what my book-entry Series I savings bonds are worth?
July 31, 2023
§ 359.56 How can I find out what my book-entry Series I savings bonds are worth?
(a) Redemption values. You may access redemption values for your book-entry bonds through your New Treasury Direct account.
(b) Redemption penalty. Redemption values shown in your New Treasury Direct account reflect the three-month interest penalty applied to bonds redeemed prior to five years from the date of issue.