U.S. Department of the Treasury

Treasury Announces 4.26% Rate for New I Bonds Through October

The Treasury sets new I bond rate at 4.26% for May-October 2026, up from 4.03% through April. The composite rate includes a variable 3.34% tied to inflation and a fixed 0.90%. The rate surge follows CPI jumping 3.3% in March, the first CPI release since the Iran war began Feb. 28, which has pushed up gasoline and consumer prices.