What are Treasury I Bonds?

Treasury I Bonds, also known as Series I savings bonds, are a type of savings bond issued by the U.S. Department of the Treasury. They are designed to be a safe, low-risk investment option for individuals looking to protect their savings from the eroding effects of inflation. Unlike traditional savings bonds or other fixed-income investments, I Bonds offer a unique interest rate structure that combines a fixed rate with a variable rate that adjusts semiannually based on inflation. This structure helps ensure that your investment's purchasing power is maintained over time. Because they are backed by the full faith and credit of the U.S. government, I Bonds are considered a very safe investment, with a guaranteed principal and an interest rate that will never fall below zero, even during periods of deflation.

How Treasury I Bonds Work

Each I Bond earns interest based on a composite rate, which is a combination of two components: a fixed rate and an inflation rate.

• Fixed Rate: This rate is determined at the time you purchase the bond and remains the same for the life of the bond, up to 30 years. While historically low, the fixed rate offers a guaranteed baseline return. For example, as of November 2024, the fixed rate was 1.20%.
• Inflation Rate: This rate adjusts every six months (in May and November) and is based on changes in the Consumer Price Index for All Urban Consumers (CPI-U). This variable portion ensures your bond's return keeps pace with inflation, preserving your purchasing power.

The composite rate, which is the actual interest rate you earn, is calculated by combining these two rates. The interest compounds semiannually, meaning that the interest earned is added to the principal, and then future interest is calculated on the new, larger principal. This compounding effect helps your savings grow over time.

Buying Treasury I Bonds

Purchasing I Bonds is a straightforward process, but it's done directly through the U.S. Treasury's online platform, TreasuryDirect.gov. As of 2025, I Bonds are only available electronically. Paper I Bonds were discontinued in 2025.

Steps to Buy I Bonds:

1. Open a TreasuryDirect Account: Visit TreasuryDirect.gov and register for a personal account. You'll need to provide your Social Security number, email address, and bank details. The website can feel dated, but it's the only official portal for purchasing.
2. Set Up Your Bank Connection: Link your checking or savings account to your TreasuryDirect account for easy purchases.
3. Place Your Order: Log in to your TreasuryDirect account, navigate to “Buy Direct,” and select “Series I Savings Bonds.” You can purchase I Bonds in any increment down to the cent, with a minimum purchase of $25.
4. Annual Purchase Limits: In any calendar year, an individual can purchase up to $10,000 in electronic I Bonds through TreasuryDirect. An additional $5,000 could be purchased via a federal tax refund as paper bonds, but this option was discontinued as of January 1, 2025.

Key Features and Benefits of Treasury I Bonds

• Inflation Protection: The primary benefit of I Bonds is their ability to protect your savings from inflation, ensuring your money maintains its purchasing power.
• Low Risk: Backed by the U.S. government, I Bonds are considered among the safest investments. Your principal is protected, and the interest rate will never drop below zero.
• Tax Advantages: Interest earned on I Bonds is exempt from state and local income taxes. Federal income tax on the interest can be deferred until you redeem the bond or until it matures (30 years). Furthermore, if the bond proceeds are used for qualified higher education expenses, the interest may be exempt from federal income tax altogether, subject to certain conditions.
• Long-Term Growth Potential: I Bonds earn interest for up to 30 years. While they may not offer aggressive growth like stocks, they provide steady, inflation-protected returns over the long haul.
• Guaranteed Principal: The redemption value of an I Bond will never decline, even during periods of deflation.

I Bonds vs. Other Savings Options

Compared to traditional savings accounts or Certificates of Deposit (CDs), I Bonds offer a significant advantage during inflationary periods. While savings accounts and CDs may offer competitive yields in a low-inflation environment, their fixed rates can erode in value as prices rise. I Bonds, with their inflation-adjusted rate, ensure your savings keep pace with or exceed inflation. However, it's important to note that the initial interest rate is guaranteed only for the first six months, after which it adjusts with inflation.

Liquidity and Redemption Rules

I Bonds have specific rules regarding access to your funds:

• Minimum Holding Period: You must hold your I Bond for at least 12 months before you can redeem it. This makes them unsuitable for emergency funds you might need immediately.
• Early Redemption Penalty: If you redeem an I Bond within the first five years of purchase, you will forfeit the last three months of accrued interest. For example, if you cash out after 18 months, you'll receive 15 months' worth of interest.
• No Penalty After Five Years: After holding the bond for five years, there is no interest penalty for redemption.
• Maturity: I Bonds earn interest for up to 30 years, after which they stop accumulating new interest.

Tax Implications of Treasury I Bonds

Understanding the tax treatment of I Bonds is crucial for maximizing their benefits:

• State and Local Taxes: The interest earned on I Bonds is exempt from state and local income taxes. This is a significant advantage, especially for those living in states with high income tax rates.
• Federal Income Tax: Federal taxes on the interest earned are deferred until the bond is redeemed, matures, or is otherwise disposed of. You will receive an IRS Form 1099-INT for the interest earned in the year of redemption.
• Higher Education Expenses: A notable tax benefit is the potential exemption from federal income tax on the interest if the I Bonds are redeemed and used to pay for qualified higher education expenses. This requires meeting certain income and other requirements.

Current Interest Rates for Treasury I Bonds

The interest rate for I Bonds is dynamic and changes every six months. The composite rate is a combination of the fixed rate and the semiannual inflation rate. As of May 2026, newly purchased Series I Savings Bonds will pay an annual composite rate of 4.26% through October 31, 2026. This rate includes a fixed rate of 0.90% and a variable inflation rate of 3.34%. These rates can fluctuate based on economic conditions.

Frequently Asked Questions about Treasury I Bonds

Q: Are Treasury I Bonds safe? A: Yes, Treasury I Bonds are considered very safe because they are backed by the full faith and credit of the U.S. government. Your principal is protected, and the interest rate will never fall below zero.

Q: How much can I invest in Treasury I Bonds? A: Individuals can purchase up to $10,000 in electronic I Bonds per calendar year through TreasuryDirect.gov.

Q: When can I redeem my Treasury I Bonds? A: You must hold your I Bond for at least 12 months before redemption. If redeemed within five years, you will forfeit the last three months of interest.

Q: How is the interest rate on I Bonds determined? A: The interest rate is a composite of a fixed rate (set at purchase) and a variable inflation rate (adjusted every six months based on CPI-U).

Q: Are I Bonds taxable? A: The interest earned is exempt from state and local taxes. Federal income tax is deferred until redemption or maturity, and may be waived if used for qualified education expenses.

Conclusion

Treasury I Bonds offer a compelling combination of safety, inflation protection, and attractive tax advantages, making them a valuable tool for preserving and growing savings, especially in times of rising prices. While they come with liquidity limitations and specific redemption rules, their ability to safeguard purchasing power and provide tax deferral makes them a unique and beneficial component of a well-rounded financial strategy. By understanding how they work and adhering to the purchase and redemption guidelines, investors can effectively leverage I Bonds to protect their financial future.