I Bonds Rates November 2025. The united states department of the treasury announces twice a year new fixed and inflation rates for i bond issues in may. I bond interest rates adjust every six months, and with the latest inflation reading now released, we can calculate what your next rate will be on existing bonds.

Graph its value, interest rate and growth over time visually. The new fixed rate will apply to i bonds purchased from november 2024 through april 2025.