I bond rates · November 2026 – April 2027

I Bond Rate for November 2026 – April 2027

Announced November 2026 1 by the Treasury: a fixed rate of 1.40%, a semiannual inflation rate of 2.04%, and the 5.51% composite those two produce.

A bond bought in this period earned 5.51% for its first six months and keeps its 1.40% fixed rate for life. This is the current period, so that is also what it earns now.

The November 2026 – April 2027 composite, worked

Treasury's formula: fixed rate + (2 × semiannual inflation rate) + (fixed rate × semiannual inflation rate), rounded to four decimals.

fixed rate                       0.0140   (1.40%)
semiannual inflation rate        0.0204   (2.04%)
0.0140 + (2 × 0.0204) + (0.0140 × 0.0204)
= 0.0140 + 0.0408 + 0.0002856
= 0.0550856
rounded: 0.0551
composite rate: 5.51%   (Treasury publishes 5.51%)

What this cohort has earned since

Its fixed rate never changes; each later period applies that period's inflation rate to it. Rates take effect on the bond's own six-month anniversaries, not on the announcement date.

Period	Inflation rate	This cohort's fixed	Composite
November 2026 – April 2027	2.04%	1.40%	5.51%

Source: TreasuryDirect — I bonds interest rates (fixed-rate and inflation-rate history). Composites are recomputed with Treasury's formula and checked against Treasury's published figures before publication. Bonds cashed before five years forfeit the last three months of interest.

Informational only, not financial or tax advice.

Last reviewed: November 2026 announcement · snapshot built 2026-11-02 from treasurydirect.gov.

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