{"data":{"id":"us/31-cfr-359.16","jurisdiction":"us","citation":"31 CFR 359.16","heading":"When does interest accrue on Series I savings bonds?","body":"(a) Interest, if any, accrues on the first day of each month; that is, we add the interest earned on a bond during any given month to its value at the beginning of the following month.\n(b) The accrued interest compounds semiannually.","path":["Title 31—Money and Finance: Treasury","Subtitle B—Regulations Relating to Money and Finance","CHAPTER II—FISCAL SERVICE, DEPARTMENT OF THE TREASURY","SUBCHAPTER A—BUREAU OF THE FISCAL SERVICE","PART 359—OFFERING OF UNITED STATES SAVINGS BONDS, SERIES I","Subpart A—General Information"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-31.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:25Z","sha256":"c202b487bae2a991bed2c0a895965f82895f0a64bc9c79586dd64b6dfc74d96e","source_id":"us-cfr","stale":true,"prev":"us/31-cfr-359.15","next":"us/31-cfr-359.17"},"notice":"GroundRules: Original legal text. Not legal advice."}