{ "dataset": "us-i-bond-rates", "title": "US Series I savings bond rates", "source": "U.S. Department of the Treasury, TreasuryDirect", "sourceUrl": "https://www.treasurydirect.gov/savings-bonds/i-bonds/i-bonds-interest-rates/", "licence": "US federal government work, public domain.", "updated": "2026-07-31", "attribution": "Economicium (economicium.com), from the source named above.", "data": { "source": "U.S. Department of the Treasury, TreasuryDirect", "sourceUrl": "https://www.treasurydirect.gov/savings-bonds/i-bonds/i-bonds-interest-rates/", "note": "Each row is a 6-month rate-announcement window (from TreasuryDirect's own I Bond Rate History spreadsheet). fixedRate is locked in for any bond first issued in that window, for the bond's full life. inflationRate is the semiannual inflation rate in effect during that window, applied to every outstanding bond whose own current earning period starts within it.", "fetchedAt": "2026-07-31", "periods": [ { "from": "1998-05", "to": "1998-10", "inflationRate": 0.0062, "fixedRate": 0.034 }, { "from": "1998-11", "to": "1999-04", "inflationRate": 0.0086, "fixedRate": 0.033 }, { "from": "1999-05", "to": "1999-10", "inflationRate": 0.0086, "fixedRate": 0.033 }, { "from": "1999-11", "to": "2000-04", "inflationRate": 0.0176, "fixedRate": 0.034 }, { "from": "2000-05", "to": "2000-10", "inflationRate": 0.0191, "fixedRate": 0.036 }, { "from": "2000-11", "to": "2001-04", "inflationRate": 0.0152, "fixedRate": 0.034 }, { "from": "2001-05", "to": "2001-10", "inflationRate": 0.0144, "fixedRate": 0.03 }, { "from": "2001-11", "to": "2002-04", "inflationRate": 0.0119, "fixedRate": 0.02 }, { "from": "2002-05", "to": "2002-10", "inflationRate": 0.0028, "fixedRate": 0.02 }, { "from": "2002-11", "to": "2003-04", "inflationRate": 0.0123, "fixedRate": 0.016 }, { "from": "2003-05", "to": "2003-10", "inflationRate": 0.0177, "fixedRate": 0.011 }, { "from": "2003-11", "to": "2004-04", "inflationRate": 0.0054, "fixedRate": 0.011 }, { "from": "2004-05", "to": "2004-10", "inflationRate": 0.0119, "fixedRate": 0.01 }, { "from": "2004-11", "to": "2005-04", "inflationRate": 0.0133, "fixedRate": 0.01 }, { "from": "2005-05", "to": "2005-10", "inflationRate": 0.0179, "fixedRate": 0.012 }, { "from": "2005-11", "to": "2006-04", "inflationRate": 0.0285, "fixedRate": 0.01 }, { "from": "2006-05", "to": "2006-10", "inflationRate": 0.005, "fixedRate": 0.014 }, { "from": "2006-11", "to": "2007-04", "inflationRate": 0.0155, "fixedRate": 0.014 }, { "from": "2007-05", "to": "2007-10", "inflationRate": 0.0121, "fixedRate": 0.013 }, { "from": "2007-11", "to": "2008-04", "inflationRate": 0.0153, "fixedRate": 0.012 }, { "from": "2008-05", "to": "2008-10", "inflationRate": 0.0242, "fixedRate": 0 }, { "from": "2008-11", "to": "2009-04", "inflationRate": 0.0246, "fixedRate": 0.007 }, { "from": "2009-05", "to": "2009-10", "inflationRate": -0.0278, "fixedRate": 0.001 }, { "from": "2009-11", "to": "2010-04", "inflationRate": 0.0153, "fixedRate": 0.003 }, { "from": "2010-05", "to": "2010-10", "inflationRate": 0.0077, "fixedRate": 0.002 }, { "from": "2010-11", "to": "2011-04", "inflationRate": 0.0037, "fixedRate": 0 }, { "from": "2011-05", "to": "2011-10", "inflationRate": 0.023, "fixedRate": 0 }, { "from": "2011-11", "to": "2012-04", "inflationRate": 0.0153, "fixedRate": 0 }, { "from": "2012-05", "to": "2012-10", "inflationRate": 0.011, "fixedRate": 0 }, { "from": "2012-11", "to": "2013-04", "inflationRate": 0.0088, "fixedRate": 0 }, { "from": "2013-05", "to": "2013-10", "inflationRate": 0.0059, "fixedRate": 0 }, { "from": "2013-11", "to": "2014-04", "inflationRate": 0.0059, "fixedRate": 0.002 }, { "from": "2014-05", "to": "2014-10", "inflationRate": 0.0092, "fixedRate": 0.001 }, { "from": "2014-11", "to": "2015-04", "inflationRate": 0.0074, "fixedRate": 0 }, { "from": "2015-05", "to": "2015-10", "inflationRate": -0.008, "fixedRate": 0 }, { "from": "2015-11", "to": "2016-04", "inflationRate": 0.0077, "fixedRate": 0.001 }, { "from": "2016-05", "to": "2016-10", "inflationRate": 0.0008, "fixedRate": 0.001 }, { "from": "2016-11", "to": "2017-04", "inflationRate": 0.0138, "fixedRate": 0 }, { "from": "2017-05", "to": "2017-10", "inflationRate": 0.0098, "fixedRate": 0 }, { "from": "2017-11", "to": "2018-04", "inflationRate": 0.0124, "fixedRate": 0.001 }, { "from": "2018-05", "to": "2018-10", "inflationRate": 0.0111, "fixedRate": 0.003 }, { "from": "2018-11", "to": "2019-04", "inflationRate": 0.0116, "fixedRate": 0.005 }, { "from": "2019-05", "to": "2019-10", "inflationRate": 0.007, "fixedRate": 0.005 }, { "from": "2019-11", "to": "2020-04", "inflationRate": 0.0101, "fixedRate": 0.002 }, { "from": "2020-05", "to": "2020-10", "inflationRate": 0.0053, "fixedRate": 0 }, { "from": "2020-11", "to": "2021-04", "inflationRate": 0.0084, "fixedRate": 0 }, { "from": "2021-05", "to": "2021-10", "inflationRate": 0.0177, "fixedRate": 0 }, { "from": "2021-11", "to": "2022-04", "inflationRate": 0.0356, "fixedRate": 0 }, { "from": "2022-05", "to": "2022-10", "inflationRate": 0.0481, "fixedRate": 0 }, { "from": "2022-11", "to": "2023-04", "inflationRate": 0.0324, "fixedRate": 0.004 }, { "from": "2023-05", "to": "2023-10", "inflationRate": 0.0169, "fixedRate": 0.009 }, { "from": "2023-11", "to": "2024-04", "inflationRate": 0.0197, "fixedRate": 0.013 }, { "from": "2024-05", "to": "2024-10", "inflationRate": 0.0148, "fixedRate": 0.013 }, { "from": "2024-11", "to": "2025-04", "inflationRate": 0.0095, "fixedRate": 0.012 }, { "from": "2025-05", "to": "2025-10", "inflationRate": 0.0143, "fixedRate": 0.011 }, { "from": "2025-11", "to": "2026-04", "inflationRate": 0.0156, "fixedRate": 0.009 }, { "from": "2026-05", "to": "2026-10", "inflationRate": 0.0167, "fixedRate": 0.009 } ] } }