• Recent News: 8/24/2010 July CPI-U Value Read More >>
  • Recent News: 7/17/2010 June CPI-U Update Read More >>
  • Recent News: 6/21/2010 April and May CPI-U Values Read More >>
  • Recent News: 5/3/2010 New I-Bond Rate for May 1, 2010: 1.74% Read More >>
  • Recent News: 4/15/2010 What will the next i-bond rate be? Read More >>

I-BONDS INFORMATION

Your Guide to Series I Savings Bonds

Skip Navigation LinksHome > Rates > Variable Rates

I Bond Variable Rate

The variable rate of an I bond is the part of the calculation that is based on the CPI-U inflation rate change. This means that the variable rate plus the fixed rate results in the composite rate. Following the variable rate is not as common as it used to be since the Treasury now focuses on the CPI-U/Inflation rate and the fixed rates instead.

Composite Rate = Fixed rate + Variable rate


Issue DateVariable Rate
May 2010 1.5415400
November 2009 3.0645900
May 2009 -5.5627800
November 2008 4.9372200
May 2008 4.840000
November 2007 3.0783600
May 2007 2.4357300
November 2006 3.121700
May 2006 1.00700
November 2005 5.728500
May 2005 3.6014800
November 2004 2.673300
May 2004 2.391900
November 2003 1.0859400
May 2003 3.5594700
November 2002 2.4796800
May 2002 0.565600
November 2001 2.403800
May 2001 2.923200
November 2000 3.0916800
May 2000 3.8887600
November 1999 3.5798400
May 1999 1.7483800
November 1998 1.7483800
September 1998 1.2610800
Mean: 2.45%
Median: 2.67%
Highest rate: 5.7285%
Lowest rate: -5.56278%

Related Links




Print this page Subscribe to the RSS feed Bookmark or Share I-Bonds

Personal Finance Sites

 Series I Bonds
 Historical CPI-U
 Online Savings Accounts
 Roth IRA Accounts
 Asset Allocation
Recommended Book
Common Sense on Mutual Funds
View more books