US Savings Bond Calculator
US Savings Bond Calculator
Estimate the current value of your Series EE or Series I savings bond. Select your series, enter the denomination and issue date, and get an instant estimate with a year-by-year breakdown. Rates verified from TreasuryDirect.gov as of May 1, 2026.
Bond Details
Paper EE bonds were sold at half their face value (a $100 paper EE bond cost $50). Electronic EE bonds (TreasuryDirect, since 2003) and all I bonds are purchased at full face value. (Source: TreasuryDirect)
This tool provides estimates only. TreasuryDirect's official calculator gives the precise redemption value.
Estimated Value Over Time
All figures are estimates based on published rate rules. Verify exact values at TreasuryDirect.
| Year | Bond Age | Est. Value | Total Gain | Notes |
|---|
How This Estimate Is Calculated
This tool uses the published rate rules from TreasuryDirect.gov. Rates shown are as of May 1, 2026.
Series EE Bond Formula
EE bonds issued since May 2005 earn a fixed annual rate, compounding semiannually.
- V = Estimated current value
- P = Purchase price — what you actually paid (paper EE bonds were sold at half their face value; electronic EE bonds are bought at full face value)
- r = Annual fixed rate (e.g. 0.0240 for 2.40%)
- t = Complete years held; semiannual compounding periods = 2t
20-year doubling guarantee: The Treasury guarantees that EE bonds issued since May 2005 will be worth at least twice their purchase price at 20 years, regardless of the accumulated rate. If the compounded total would be less than 2×, the Treasury makes a one-time adjustment to reach that minimum. (Source: TreasuryDirect)
Current rate (May–Oct 2026): 2.40% annual fixed rate.
Early redemption penalty: If held fewer than 5 years, you forfeit the
last 3 months of interest.
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Frequently Asked Questions
The estimates use the fixed-rate compounding formulas published by TreasuryDirect.gov. For Series EE bonds issued since May 2005, the tool applies the fixed rate for your issue period. For older bonds and all Series I bonds, current rates are used as an approximation. For the precise redemption value, always use the official TreasuryDirect Savings Bond Calculator at treasurydirect.gov.
The US Treasury guarantees that Series EE bonds issued since May 2005 will be worth at least twice their purchase price at 20 years. If the accumulated interest at the stated rate falls short of 2x, the Treasury makes a one-time adjustment. This makes the effective minimum yield at 20 years approximately 3.5% annualized, regardless of the current fixed rate.
If you redeem a savings bond within the first five years, you forfeit the last three months of interest. For example, if you cash a bond after exactly 2 years, you receive only 21 months of interest. This penalty disappears after the 5-year mark.
Both Series EE and Series I bonds earn interest for up to 30 years from the issue date. After 30 years, the bond stops earning interest entirely and should be redeemed. You can redeem any time after the first 12 months.
It depends on the bond format. PAPER Series EE bonds (sold at banks through 2011) were purchased at half their face value — a $100 paper EE bond cost $50, and the doubling guarantee means it reaches its $100 face value at original maturity. ELECTRONIC EE bonds (TreasuryDirect, since 2003) are purchased at full face value — you pay $100 for a $100 bond, and the guarantee doubles that to $200 at 20 years. Series I bonds are always purchased at full face value in both formats. Source: TreasuryDirect.gov.