What changed and why it matters
The Treasury set a 5.51% annual rate for Series I savings bonds purchased between Nov. 1 and April 30. That figure is the composite yield after rounding and represents a step up from the 4.26% available on bonds bought through Oct. 31.
This 5.51% reflects two components. The fixed rate now sits at 1.40%, an increase from 0.90% back in April, marking the strongest fixed rate since 2006. The inflation-linked portion is 4.08%. As David Enna put it, "I bonds are a lot more attractive at this point."
How the rate is built
I bonds combine a fixed rate that never changes for that bond and a variable rate tied to inflation. The Treasury resets both pieces twice a year in May and November. The inflation element is derived from the six month change in the consumer price index.
Ken Tumin, founder of DepositQuest.com, says some analysts believe the fixed rate takes cues from real (inflation-adjusted) five-year TIPS yields, and he added, "There's some uncertainty there."
What existing holders should know about timing
Rate updates for current holders follow a six month clock that starts on your original purchase date. After six months, your bond's inflation portion rolls to the next announced variable rate, while your fixed percentage stays the same for as long as you own it.
Here is a simple illustration. A buyer in March received a 3.12% variable rate and a 0.9% fixed rate. Six months later, the variable piece switches to 3.34% - the level announced in April 2026 - and the fixed rate remains 0.9%.
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I bonds pay interest for up to 30 years, but they cannot be redeemed in the first year. Cashing out within five years costs you the last three months of interest.
Inflation backdrop and investor interest
During the post pandemic surge in prices, the I bond rate reached a record 9.62% in May 2022, and investors sent millions into these government backed, near risk free bonds. As inflation eased and I bond yields declined, many short term buyers cashed out. With inflation pushing rates higher again, experts say investors could return.
Price pressures have picked up lately. The Bureau of Labor Statistics said consumer prices were 3.7% higher in September 2026 than a year earlier, up from 3.4% in August. Economists cited the Iran war lifting fuel and broader energy expenses, President Donald Trump's tariffs, the construction of new artificial intelligence data centers, and robust travel demand as drivers of the increase. Households also see more inflation ahead: in September the one-year outlook rose to 3.9%, its highest reading in more than three years, the New York Fed reported in a survey released in early October.
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