Treasury Department announces new Series I bond rate of 5.51% for the next six months

by | Nov 14, 2026 | Financial

Treasury Department announces new Series I bond rate of 5.51% for the next six months

The U.S. Department of the Treasury announced updated rates for Series I bonds that will take effect for new purchases beginning November 1. The new composite rate stands at 5.51% annually for the six-month period extending through April 30, representing an increase from the 4.26% rate that applied to purchases made through October 31.

The announced rate consists of two components: a variable portion of 4.08% tied to inflation measures and a fixed portion of 1.40%. The fixed-rate increase marks the highest level for this component since 2006, climbing from the 0.90% rate announced in the previous adjustment period. The variable rate component is recalculated every six months based on consumer price index data, while the fixed rate remains constant for the life of each bond.

The announcement comes amid rising price pressures in the broader economy. The consumer price index increased 3.7% in September compared to the prior year, up from a 3.4% annual pace in August. Analysts attribute recent inflation acceleration to multiple factors, including geopolitical tensions affecting energy markets, tariff policies, expansion of artificial intelligence infrastructure, and heightened consumer travel demand. Consumer inflation expectations have also shifted upward, with one-year inflation outlook data reaching 3.9% in surveys conducted earlier this month—the highest level recorded in over three years.

Market observers noted that higher I bond rates may attract renewed investor interest. Following record rates of 9.62% reached in May 2022 during the post-pandemic inflation surge, many investors had redeemed bonds as rates declined along with inflation. Treasury officials adjust I bond rates twice annually, in May and November, based on economic conditions. Current bondholders will see their variable rate component update on their six-month anniversary dates, while fixed rates remain unchanged for the duration of ownership. I bonds cannot be redeemed within the first year of purchase, and early redemption within five years results in forfeiture of the previous three months of interest.

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