I Bond Inventory

Valuation settings

Total value
Purchase amount
Total principal entered
Interest earned
Penalty impact
Only applies to bonds under 5 years

I-Bond valuations

Purchased Amount Value Current rate Average rate Status Actions

How this app works

Inputs per bond
Purchase amount, purchase month, and purchase year.
Valuation month
You can price the full inventory for any selected month and year.
Two value modes
Use redemption value for a realistic cash-out amount, or accrued value to ignore the early-redemption penalty.
Saved locally
Your inventory stays in this browser using local storage until you clear it or import a replacement file.
Backup & Import
Backup saves your inventory as a CSV file. Import restores it. You can also create a CSV manually — one bond per line in the format MM,YYYY,Amount, for example 03,2001,1000. Importing replaces your current inventory entirely.