Inflation and I Bond

New!

The I Bond Calculator

Use the I Bond Calculator to get monthly values of your I bond investment. Get a graphical comparison of your I bond's growth to inflation. Download monthly values in CSV format.

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Inflation Calculator

Coming soon!

In the coming weeks I will be publishing

(1) source code in C# for generating all I bond values in a single step, and

(2) a dataset containing all I bond values.

New!

Create a Summary of All Your I Bonds

Use this tool to generate a table summarizing all your I bonds as of the first of the current month. The table will list out the following information:

Purchase date
Purchase amount
Fixed interest
Accrued value, and
Redemption value.

An additional column will contain a link to the details of the individual I bonds. A copy button makes it easy to copy and paste the generated table into Microsoft Excel or other applications.

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New!

Track I Bond in Quicken and Moneydance

Generate price history files for I bonds. Upload these files to Quicken or Moneydance to track them in these two programs.

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New!

Track All Your I Bonds in Excel

A spreadsheet solution to track all your I bonds and get the accrued value, redemption value, and fixed rate on any date.

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