Series EE Bond vs Series I Bond

The U.S. Treasury offers two types of savings bonds to individuals: Series EE bonds and Series I bonds. Both are backed by the federal government and tax-deferred, but they protect against very different risks. Series EE bond vs Series I bond is really a choice between a fixed, long-term rate-doubling guarantee and a variable rate that adjusts for inflation. Knowing which one fits your goal clarifies how to build a conservative savings layer.

The EE bond: a fixed promise

A Series EE bond is a savings bond you purchase from the U.S. Treasury. You buy it at a discount (50% of par value—so a $100 face-value bond costs $50), and it earns a fixed interest rate for its entire life.

As of 2026, newly issued Series EE bonds earn a fixed rate around 2.5% annually. This rate is locked in when you buy and never changes, no matter what happens to inflation or market rates.

The most distinctive feature: a Series EE bond is guaranteed to double in value at the 20-year mark. If you buy a $50 bond (with a $100 par value), the Treasury promises it will be worth at least $100 after exactly 20 years, even if the fixed interest rate would normally yield less. This provides a floor: you cannot lose money, and you’re assured of at least a 3.5% annualized return over 20 years (since doubling $50 to $100 over 20 years is a 3.5% compound annual rate).

You can redeem an EE bond after one year, but if you redeem before five years, you forfeit the last three months of interest as a penalty.

The I bond: inflation protection

A Series I bond—the “I” stands for “inflation”—is a Treasury security that combines a fixed component with an inflation component. The composite rate is reset every six months based on new inflation data.

The formula: Fixed rate + Inflation adjustment (both recalculated in May and November each year).

If the fixed component is 1.0% and the current inflation adjustment is 2.5%, your combined rate is 3.5% for the next six months. When the rates reset in six months, the fixed part stays at 1.0%, but the inflation part updates. If inflation has slowed to 1.5%, your new rate becomes 2.5%.

This design protects you against inflation eating into your real return. If inflation spikes to 8%, an I bond’s rate will also rise, keeping your purchasing power intact. If deflation hits (falling prices), your I bond still can’t fall below zero—you earn the fixed component at minimum.

The current fixed rate on I bonds is around 1.06%, with inflation adjustments published every six months. You can redeem I bonds after one year, and you forfeit the last three months of interest if you redeem before five years.

Fixed rate vs inflation: which risk matters to you?

The choice between EE and I bonds hinges on what you fear more: inflation or deflation, and how long you’re willing to lock up your money.

Choose an EE bond if:

• You believe inflation will stay moderate or fall over your holding period (or you don’t care—you just want a safe, guaranteed doubling)
• You’re holding for the full 20 years to capture the doubling guarantee
• You want predictability: you know exactly what your money will be worth at maturity
• You’re very risk-averse and comfortable with 2.5% if inflation runs higher

Choose an I bond if:

• You’re concerned about inflation eroding your savings over the next decade or two
• You want your purchasing power protected if inflation spikes
• You prefer a variable rate that adjusts with economic conditions
• You can hold for at least five years without penalty

Real return: the inflation math

Here’s a concrete example. Suppose inflation averages 3% per year over the next 20 years.

An EE bond earning a fixed 2.5% will lose purchasing power. After 20 years, you’ve earned 2.5% annual returns, but prices have risen 3% annually, so your real return is negative: roughly −0.5% per year. You doubled your money nominally, but it buys less in real terms.

An I bond starting at 1.0% fixed + 3.0% inflation = 4.0% composite will keep your purchasing power stable. The 1% fixed component and the 3% inflation adjustment balance out the 3% inflation.

If inflation unexpectedly runs at 6% for a stretch, the I bond’s inflation component jumps, and you benefit immediately. The EE bond’s return stays at 2.5%, falling further behind.

Tax treatment and the education angle

Both EE and I bonds are exempt from state and local income tax. Federal tax on the interest is deferred until you redeem or the bond matures.

Additionally, there’s a tax-free redemption if you use the proceeds for qualified education expenses (tuition, fees, books at an accredited institution)—but only if you meet specific requirements: you must be at least 24 years old when you purchase the bond, the beneficiary must be a dependent, and you must redeem in the same year you pay the education expenses. This rule is sometimes called the “Education Savings Bond” provision. It’s not automatic; you have to elect it on your tax return.

Practical limits and how to buy

You can purchase up to $10,000 in electronic EE bonds and up to $10,000 in electronic I bonds per calendar year per individual. If you want to buy more, you can purchase paper bonds with your tax refund (up to $5,000 EE, up to $5,000 I).

You buy Treasury savings bonds directly from TreasuryDirect.gov, the U.S. Treasury’s online portal. No brokerage fees, no bank intermediary. Setting up an account takes minutes.

When to hold past maturity

Both EE and I bonds can be held past their 20-year final maturity. An EE bond will continue earning its fixed 2.5% indefinitely. An I bond will continue adjusting its rate every six months. You have up to 30 years total to redeem.

If you’ve aged 20 years and the EE bond has doubled, ask yourself: will the next 10 years of 2.5% annual growth outpace your other options? If rates have risen significantly and you could earn 5% in a CD or high-yield savings account, redeem the EE bond and move the money. If rates are still low, holding the EE bond might make sense.

For I bonds, the same logic applies, but the variable rate adapts. If inflation is high, I bonds keep adjusting upward and might be attractive to hold longer.

See also