EE Bond Formula:
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The US Treasury Direct EE Bond Calculator calculates the current value of EE savings bonds based on purchase amount, annual interest rate, and years held. EE bonds are low-risk savings bonds issued by the US Treasury that earn interest for up to 30 years.
The calculator uses the EE bond compound interest formula:
Where:
Explanation: The formula accounts for semi-annual compounding, where interest is calculated twice per year and added to the principal.
Details: Accurate EE bond valuation helps investors track their savings growth, plan for future expenses, and make informed decisions about holding or redeeming bonds.
Tips: Enter purchase amount in USD, annual interest rate as a decimal (e.g., 0.025 for 2.5%), and years held. All values must be valid (purchase amount > 0, rate ≥ 0, years ≥ 0).
Q1: What are EE bonds?
A: EE bonds are US government savings bonds that earn interest for up to 30 years. They are guaranteed to double in value in 20 years.
Q2: How often does interest compound on EE bonds?
A: Interest compounds semiannually (twice per year), which is reflected in the formula's exponent of 2*y.
Q3: What is the minimum purchase amount for EE bonds?
A: The minimum purchase amount is $25 when buying electronically through TreasuryDirect.
Q4: Can EE bonds lose value?
A: No, EE bonds cannot lose value. They are guaranteed to reach face value at 20 years and continue earning interest for 30 years.
Q5: When is interest taxed on EE bonds?
A: Interest is subject to federal income tax but exempt from state and local taxes. Tax can be deferred until redemption or maturity.