Home
Back
US Savings Bond Formula:
| From: | To: |
The US Savings Bond Value Calculator estimates the current value of US savings bonds using the official Treasury calculation method. It calculates compound interest with semi-annual compounding based on the bond's purchase amount, annual interest rate, and years held.
The calculator uses the US Treasury savings bond formula:
Where:
Explanation: The formula calculates compound interest with semi-annual compounding (interest applied twice per year), which is standard for US savings bonds.
Details: Accurate bond valuation helps investors track their investment growth, plan for future financial needs, and make informed decisions about holding or redeeming bonds.
Tips: Enter the original purchase amount in USD, annual interest rate as a decimal (e.g., 0.025 for 2.5%), and years held. All values must be positive numbers.
Q1: What types of savings bonds does this calculator work for?
A: This calculator works for Series EE and Series I savings bonds that use semi-annual compounding interest.
Q2: How accurate is this calculator compared to the Treasury's official tool?
A: This provides a close estimate, but for exact values, always refer to the Treasury's official Savings Bond Calculator.
Q3: Do savings bonds continue earning interest indefinitely?
A: No, most savings bonds stop earning interest after 30 years. Check the specific bond's maturity terms.
Q4: Can I redeem my savings bond before it matures?
A: Yes, but you must hold the bond for at least 1 year, and redeeming within 5 years incurs a penalty of the last 3 months' interest.
Q5: Where can I find the current interest rates for savings bonds?
A: Current rates are published on the TreasuryDirect website and updated every six months for Series I bonds.