How US Savings Bonds Work: I Bonds vs EE Bonds

US savings bonds are government-backed savings products that help you preserve principal while earning interest in a way that is different from bank deposits and market-traded bonds. Series I bonds protect against inflation through a combined rate, while Series EE bonds promise a government-backed doubling feature if held long enough.

What are US savings bonds?

US savings bonds are non-marketable Treasury securities designed for individual investors. You buy them directly from the Treasury, hold them in a TreasuryDirect account, and redeem them later for principal plus accumulated interest, subject to holding-period rules.

They are not traded on an exchange, so their value does not move up and down the way a bond fund or individual Treasury note would. That makes them easier to understand for savers who want a simple structure, but it also means you give up the liquidity and price transparency of market-traded securities. For a broader glossary of fixed-income terms, see /en/sozluk.

How do Series I bonds work?

Series I bonds are built to help savings keep pace with inflation. Their total return combines a fixed rate set when the bond is issued and an inflation component that changes with a government inflation measure. The fixed rate stays the same for the life of the bond, while the inflation component resets periodically.

That structure matters because the bond’s interest is not a simple coupon. Instead, the Treasury calculates the composite rate from those two parts, so the bond can deliver more income when inflation is higher and less when inflation is lower. In plain English: the fixed rate is the bond’s permanent spread, and the inflation component is the moving part that helps maintain purchasing power.

Series I interest accrues monthly and compounds semiannually. You do not receive the interest in cash each month; it is added to the bond’s value, which is why the balance grows over time even when nothing is paid into your bank account.

How do Series EE bonds work?

Series EE bonds are simpler. They earn a fixed interest rate set at purchase, and that rate remains in place for the bond’s life. Their standout feature is the Treasury’s guarantee that the bond will double in value if you hold it long enough, which is why EE bonds are often described as having a long-term minimum return structure.

If the fixed rate alone does not get the bond to that doubling point within the required holding period, the Treasury makes a one-time adjustment when the bond reaches the applicable maturity threshold. That feature is what distinguishes EE bonds from ordinary fixed-rate savings products.

Series I versus Series EE: what is the difference?

Feature	Series I	Series EE
Interest structure	Fixed rate plus inflation component	Fixed rate only
Inflation protection	Directly linked to inflation adjustments	No direct inflation adjustment
Long-term special feature	No doubling guarantee	Guaranteed doubling if held long enough
Interest accrual	Monthly accrual with semiannual compounding	Monthly accrual with semiannual compounding
Typical role	Preserving purchasing power	Simple long-term government-backed savings

The practical difference is straightforward. I bonds are designed to respond to inflation, so they are usually the more relevant comparison when a saver is worried about rising prices. EE bonds are more about a predictable government promise over a longer holding period, making them easier to explain but less tailored to inflation risk.

What is the EE doubling guarantee at twenty years?

EE bonds carry a government guarantee that they will reach at least double the original purchase price if held long enough. The commonly cited holding period is twenty years, after which the Treasury will credit enough interest to bring the bond to that minimum value if the posted rate has not already done so.

This does not mean the bond stops earning after that point. It means the special doubling feature has been satisfied, and the bond can continue to accrue interest afterward until redemption or final maturity. The feature is one reason EE bonds appeal to savers who want a simple long-horizon commitment.

How much can you buy, and how do you purchase them?

Savings bonds have purchase limits that can change by law or Treasury rule, so the safest practice is to check the TreasuryDirect website before you buy. The Treasury also uses account and registration rules that determine who can hold the bonds, how gifts work, and how purchases are recorded.

Most retail investors buy electronic bonds through TreasuryDirect rather than paper certificates. You create an account, link a bank account, and place the order online. If you are comparing ways to hold government-backed cash-like assets, it may help to review broker-account mechanics in /en/brokerlar and account basics in /en/tools.

When does savings bond interest accrue, and when is it taxed?

Savings bond interest accrues over time, but federal income tax is generally deferred until redemption, final maturity, or another taxable event. In other words, you usually do not owe tax each year on the interest as it builds inside the bond.

That deferral can be useful for long-term savers, but it also means a future tax bill can arrive all at once when the bond is cashed in. State and local tax treatment is different from federal treatment, so investors should check the current Treasury rules and their own tax situation before relying on any bond strategy.

For readers who want the bigger fixed-income picture, it also helps to compare savings bonds with /en/category/ekonomi coverage of rates, inflation, and household cash management. The key point is that tax timing is part of the return, not separate from it.

How do savings bonds compare with TIPS and bank deposits?

Series I bonds and Treasury Inflation-Protected Securities both offer inflation-related protection, but they do it differently. I bonds are retail savings products with tax deferral and purchase limits, while TIPS are marketable Treasury securities that trade in the secondary market and can fluctuate in price before maturity.

Bank deposits such as savings accounts and certificates of deposit are simpler operationally and may be easier to access through a brokerage or bank app, but they do not have the same Treasury inflation feature. Deposits are also subject to deposit-insurance rules, while savings bonds are direct obligations of the US government. The right comparison depends on whether the priority is liquidity, inflation protection, simplicity, or tax deferral.

A useful rule of thumb is that I bonds are about preserving purchasing power, EE bonds are about a guaranteed long-term minimum, TIPS are about tradable inflation-linked bond exposure, and bank deposits are about cash management. None is universally best; each solves a different problem.