I Bond Rates Reset November 1 — and the Number That Matters Most Is About to Hit Its Highest Level Since 2007

Two Rates, One Bond: What Actually Resets on November 1

An I bond's total yield — the "composite rate" — is built from two separate pieces that reset on different clocks. The first is a variable inflation rate, recalculated every six months to track the Consumer Price Index. The second is a fixed rate, set on the day you buy, that stays with that specific bond for its entire 30-year life.

For bonds purchased between May 1 and October 31, 2026, the composite rate is 4.26% annualized for the first six months. That breaks down into a 0.90% fixed rate plus a 3.34% annualized inflation component. On November 1, both pieces reset: the inflation component recalculates based on recent CPI data, and — more importantly — the Treasury announces a brand-new fixed rate for bonds bought from that date forward.

Here's the catch that trips up most buyers: the inflation component is temporary and resets twice a year no matter which bond you hold, so chasing it is a short-term game. The fixed rate is permanent. Whatever fixed rate is in effect the day you buy is the rate your money earns on top of inflation for as long as you own the bond.

Why the Fixed Rate Is the Number That Matters

Because the fixed rate never changes for a given bond, it's the closest thing I bonds have to a permanent competitive advantage. A bond with a 0.90% fixed rate will always earn 0.90% more than the measured inflation rate. A bond with a 1.30% fixed rate earns 1.30% above inflation — forever. Over a decade or two of compounding, that gap is the difference between a mediocre inflation hedge and a genuinely attractive real return.

And the fixed rate is climbing. A widely followed rule of thumb ties it to roughly 65% of the six-month average real yield on 5-year Treasury Inflation-Protected Securities (TIPS). With 5-year TIPS real yields running above 2% in recent months — up sharply from where they sat at the last reset — analysts who track this closely project the November fixed rate will land somewhere around 1.20% to 1.30%. Treasury does not publish its formula and has not announced the figure, so treat this as a well-informed estimate rather than a done deal. If it lands at 1.30%, it would be the highest fixed rate the Treasury has offered on an I bond since 2007.

To put the stakes in perspective: moving from today's 0.90% fixed rate to a projected 1.25% is a 0.35-percentage-point increase that locks in for three decades. On a $10,000 position held 20 years, that seemingly small gap compounds into hundreds of dollars of additional real return — with no added risk, because both bonds carry the full backing of the U.S. government.

The Fine Print Before You Buy

• Annual limit: You can buy $10,000 in electronic I bonds per Social Security number each calendar year through TreasuryDirect.gov. A married couple can buy $20,000 combined, and you can purchase separately for a trust or a business entity.
• One-year lockup: I bonds cannot be redeemed at all for the first 12 months. This is not an emergency fund — only commit money you won't need for at least a year.
• Three-month interest penalty: If you cash out before holding for five years, you forfeit the most recent three months of interest. Hold five years or longer and there's no penalty.
• Tax treatment: Interest is exempt from state and local income tax and is deferred from federal tax until you redeem the bond or it matures — a quiet advantage for savers in high-tax states.
• It's electronic and self-service: There's no bank, broker, or middleman. You open a TreasuryDirect account directly with the U.S. Treasury, which is free but has a dated interface, so give yourself a little time.

Buy Before November 1, or Wait? A Decision Framework

The right move depends almost entirely on your time horizon. If you buy by October 31, you lock in today's 0.90% fixed rate permanently and earn the current 4.26% composite rate for your first six months. If you wait until November 1, you give up that known 4.26% starting rate but capture the projected ~1.25% fixed rate for the life of the bond.

For a long-term holder — someone planning to keep the bond five, ten, or twenty years — waiting is usually the stronger play. The higher permanent fixed rate compounds over your entire holding period and will almost certainly outweigh a slightly lower six-month starting yield. For a short-term holder who intends to redeem near the one-year minimum, the current 4.26% composite rate carries more weight, which tilts the math toward buying before the reset.

One nuance worth knowing: you don't have to choose perfectly. Some savers split the difference by buying up to this year's limit before November 1 to lock in the current rate, then buying again in January with next year's limit at whatever fixed rate is then in effect. If the fixed rate stays elevated, that captures the best of both windows without doubling up in a single tax year.

A Quick Reality Check on Expectations

Don't let the 4.26% composite rate anchor your decision — it's a six-month teaser that resets no matter what. The permanent fixed rate is the real prize this cycle. If you're a long-term saver, the projected jump to roughly 1.25% is worth waiting a few weeks for. If you need the money back within about a year, lock in today's higher composite rate before October 31 instead.