These bonds are still earning interest until 30 years after issue (Sep 2028 for September 1998 bonds). You can cash them any time, or keep them growing. How to cash a bond
Key facts about 1998 Series I bonds
- A $100 bond issued September 1998 is now worth 5.3 times its $100.00 purchase price.
- Over the past 12 months a $100 September 1998 bond grew from $493.96 to $526.48 (+$32.52, 6.6%).
- It keeps earning for about 1 more year, until Sep 2028.
- Fixed rate (set at purchase, never changes): Sep–Oct 1998: 3.40%; Nov–Dec 1998: 3.30%.
- Composite rate in the 6-month period starting May 2026 (by issue month): Sep–Oct: 6.80%; Nov–Dec: 6.70%.
Value by issue month
| Issue month | $50 bond | $100 bond | $500 bond | $1,000 bond | Status | Final maturity |
|---|---|---|---|---|---|---|
| September 1998 | $263.24 | $526.48 | $2,632.40 | $5,264.80 | Earning | Sep 2028 |
| October 1998 | $261.78 | $523.56 | $2,617.80 | $5,235.60 | Earning | Oct 2028 |
| November 1998 | $256.50 | $513.00 | $2,565.00 | $5,130.00 | Earning | Nov 2028 |
| December 1998 | $255.10 | $510.20 | $2,551.00 | $5,102.00 | Earning | Dec 2028 |
Values as of October 2026. Other face values are proportional: a $200 bond is worth twice the $100 value. Click a month to open it in the calculator.
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How the value has grown
Questions about 1998 Series I bonds
How much is a $100 Series I bond from 1998 worth?
As of October 2026, a $100 Series I bond issued in 1998 is worth $510.20 to $526.48, depending on the month it was issued. It cost $100.00 new.
What interest rate do 1998 I bonds earn?
Each I bond keeps the fixed rate it was issued with (Sep–Oct 1998: 3.40%; Nov–Dec 1998: 3.30%) plus the current inflation rate, which resets every six months. Source: U.S. Treasury Fiscal Data.
Do 1998 Series I bonds still earn interest?
Yes. They earn interest for 30 years from the issue date.
Is the value before tax?
Yes. Savings bond interest is subject to federal income tax but not state or local income tax.
All Series I values by year · Found old savings bonds? What to do