The number on the TreasuryDirect page is 4.26%. For a saver comparing safe places for cash, that is the obvious headline. It is not the whole contract.
An I bond bought from May through October 2026 earns that composite rate for its first six-month earning period. After that, the inflation component resets. The 0.90% fixed component does not. It stays attached to the bond for as long as the bond earns interest, up to 30 years.
That distinction changes the decision. A short-term saver should focus first on access. A long-term saver should ask whether a permanent 0.90% real component, plus future inflation adjustments, deserves a place in the household’s inflation-protection bucket.
What changed
Treasury set the current terms on May 1, 2026. New I bonds issued through October 31 carry a 0.90% annual fixed rate and a 1.67% semiannual inflation rate. Treasury’s formula combines them into a 4.26% annualized composite rate for the bond’s first six-month earning period.
The fixed rate has moved meaningfully over the past four years. It was 0.00% in May 2022, rose to 0.40% that November, reached 0.90% in May 2023 and peaked at 1.30% for bonds issued from November 2023 through October 2024. It then stepped down to 1.20%, 1.10% and today’s 0.90%.
The current fixed rate is therefore neither a historical extreme nor a throwaway detail. It is the part a buyer can know for the life of the bond. The next fixed rate will be announced November 1; Treasury has not announced what it will be.
Why it matters
Many households treat the composite rate as though it were a one-year certificate-of-deposit rate. It is not. The rate changes every six months from the bond’s issue month, and the inflation component can rise or fall. Treasury will not let the combined rate fall below zero, but future composite rates are unknown.
The fixed component supplies the durable floor above inflation when the inflation adjustment is positive. In plain language, today’s buyer locks in the same 0.90% fixed component while the inflation portion keeps resetting under Treasury’s formula.
The access rules are just as important. You cannot redeem an electronic I bond during its first 12 months. If you redeem before five years, you lose the final three months of interest. That makes an I bond a poor home for emergency cash or a bill due next spring, even when the displayed yield looks attractive.
The case
I bonds fit best when the objective is purchasing-power protection rather than maximum current income. They can serve as a slow-building reserve for spending that is more than a year away: a later retirement phase, a future car replacement, a home project or part of a conservative bond allocation.
The structure removes two common headaches. The owner does not watch a market price, and the bond’s value does not decline because interest rates moved higher. Interest accrues monthly and compounds semiannually. The bond can continue earning for 30 years unless it is redeemed earlier.
Tax treatment can help. I-bond interest is subject to federal income tax but not state or local income tax. Treasury also allows owners generally to report interest each year or defer it until redemption or maturity. The better choice depends on the household’s tax path, so it is worth coordinating with a tax adviser rather than assuming deferral is always best.
The purchase limit keeps the strategy contained. One Social Security Number or Employer Identification Number may buy up to $10,000 of electronic I bonds in a calendar year. The minimum purchase is $25. For many families, that makes I bonds a useful sleeve—not a complete bond portfolio.
The other view
The strongest objection is liquidity. A one-year lock is absolute for ordinary redemptions, and the three-month penalty matters if the bond is sold before year five. A Treasury bill, money-market fund or insured deposit may be more appropriate for near-term spending, even if its quoted yield changes faster.
TIPS are another inflation-protection tool. Treasury issues them in 5-, 10- and 30-year terms. Their principal adjusts with inflation, and Treasury pays at least the original principal at maturity. Unlike I bonds, TIPS are marketable and can be sold before maturity—but that means the market price can rise or fall before the maturity date.
TIPS also work more naturally in brokerage and retirement accounts, while I bonds are purchased electronically through TreasuryDirect and cannot be held inside an IRA. The choice is not simply which yield is higher today. It is whether the household wants market liquidity, tax-sheltered account access and a defined maturity, or a nonmarketable savings bond with a one-year lock and a fixed component that persists.
What to watch next
The next Treasury reset is scheduled for November 1. It will establish a new fixed rate for bonds issued during the following six months and a new semiannual inflation component for all I bonds as their individual reset dates arrive.
Do not assume the new fixed rate will be lower, and do not treat October 31 as a universal buy deadline. The sensible comparison will use the terms actually available when the money is ready, alongside Treasury bills, insured bank rates and TIPS yields of a similar horizon.
Also check the calendar. Buying in September means the bond’s rate changes each March and September. Treasury credits interest from the first day of the issue month, but the 12-month redemption restriction still applies. Match that lock to the date the money may be needed.
Decision in 30 seconds
- Need the money within 12 months? Do not use an I bond for it.
- May need it within five years? Price in the three-month interest penalty.
- Saving beyond five years? Compare the lasting 0.90% fixed component and inflation reset with TIPS, insured deposits and your tax situation.
- Want to buy? Remember the $10,000 annual electronic limit per Social Security Number or Employer Identification Number.
- Waiting for November? That is a choice between known terms now and unknown terms later—not a guaranteed upgrade or loss.
Primary sources
- TreasuryDirect: I bonds at a glance
- TreasuryDirect: I bond current and historical rates
- TreasuryDirect: Treasury Inflation-Protected Securities
This article is general information, not individualized investment, tax or legal advice. Rates, inflation adjustments and personal circumstances can change.
