Calculate the current value of your US Series I, EE, and E Savings Bonds. See how much your bond is worth today, project future values, and track interest earnings.
This calculator provides estimates based on standard formulas and user-provided inputs. Actual savings bond values are determined by the U.S. Treasury and may differ due to rate adjustments, penalty periods, or bond-specific terms. Always verify with TreasuryDirect for official values.
U.S. Savings Bonds are debt securities issued by the U.S. Department of the Treasury to help individuals save money while supporting government borrowing. They are one of the safest investments available because they are backed by the full faith and credit of the U.S. government.
Series I (Inflation-Protection) Savings Bonds earn interest based on a combination of a fixed rate (set at purchase) and a semiannual inflation rate (adjusted every May and November). The composite rate is calculated as:
Composite Rate = Fixed Rate + (2 × Inflation Rate) + (Fixed Rate × Inflation Rate)
Interest is compounded semiannually (every 6 months from the issue date). I Bonds can be purchased for as little as $25 and up to $10,000 per year electronically.
Series EE Savings Bonds earn a fixed rate of return set at the time of purchase. EE Bonds issued after May 2005 earn a fixed rate determined by the Treasury. A key feature is the 20-year doubling guarantee — the Treasury guarantees that the bond will be worth at least double its face value after 20 years, equivalent to about 3.53% APR compounded semiannually.
Series E Savings Bonds were issued from 1941 to 1980, primarily to finance World War II. These bonds were sold at a discount (e.g., $18.75 for a $25 bond) and reached face value at maturity. Most Series E bonds have reached their final maturity (40 years from issue) and no longer earn interest.
Interest earned on U.S. savings bonds is subject to federal income tax but is exempt from state and local income taxes. You have two tax reporting options:
Interest may be tax-exempt if used for qualified higher education expenses (Education Savings Bond Program — income limits apply).
After a bond reaches final maturity, it stops earning interest. There is no penalty for holding a matured bond, but you're losing potential earnings by not redeeming it and reinvesting.
I Bonds: Interest is calculated using a composite rate that combines a fixed rate (set at purchase) with a semiannual inflation rate. The formula is: Composite Rate = Fixed Rate + (2 × Inflation Rate) + (Fixed Rate × Inflation Rate). Interest compounds semiannually.
EE Bonds: Interest is based on a fixed rate set at purchase. The bond's value grows at this fixed rate, compounded semiannually, with a guarantee that the bond will double in value after 20 years.
E Bonds: Original E bonds were sold at a discount and accrued interest to face value. Most have reached final maturity.
The Treasury announces new I Bond rates every May 1st and November 1st. As of the latest announcement, the composite rate depends on the fixed rate you locked in when you purchased plus the current semiannual inflation rate. Check TreasuryDirect.gov for the most current rates.
No. U.S. Savings Bonds are backed by the full faith and credit of the U.S. government, so you will never lose your principal investment. I Bonds can never have a negative composite rate that reduces your principal — the composite rate will never go below 0%. However, you may lose 3 months of interest if you redeem an I Bond or EE Bond within the first 5 years.
Yes, savings bond interest is subject to federal income tax. However, it is exempt from state and local income taxes. You can choose to report interest each year or defer it until you redeem the bond. If you use the bond proceeds for qualified higher education expenses, the interest may be entirely tax-free under the Education Savings Bond Program (subject to income limits).
When a savings bond reaches its final maturity (30 years for I Bonds and EE Bonds; 40 years for E Bonds), it stops earning interest. The bond does not lose value — it remains worth its final maturity value. However, you should redeem matured bonds and reinvest the proceeds, since they are no longer earning you any return. You can redeem matured bonds through TreasuryDirect or at most financial institutions.