I Bonds Rate May 2026: New 4.26% Composite Rate — Is It Still Worth Buying?

# I Bonds Rate May 2026: New 4.26% Composite Rate — Is It Still Worth Buying?

> **Quick answer:** The Treasury reset the I Bond composite rate to 4.26% on May 1, 2026, combining a sticky 0.90% fixed rate with a 3.34% inflation adjustment. It beats 1-year T-Bills (3.75%) and most money-market funds but trails top CD rates (4.10–4.50%). The real question is not which number is bigger — it is whether you need inflation insurance for the next 30 years or a competitive yield for the next 12 months. For most savers, the answer determines whether they should buy, skip, or already own enough.

The I Bond rate reset is one of the most searched personal finance events of each calendar year, and May 2026 is no exception. The U.S. Treasury announced May 1 that Series I savings bonds will earn a composite rate of 4.26% through October 31, 2026. With CPI running near 3.8% and inflation still an open question heading into the second half of the year, that headline number landed quietly — not the 9.62% shock of 2022, but not irrelevant either. Here is what every saver needs to know before deciding whether to buy, hold, or pass.

> **This article is for informational purposes only and does not constitute financial advice. Consult a qualified financial advisor for personal financial decisions.**

## What the 4.26% Rate Actually Means

The I Bond composite rate is not a single number — it is two numbers bolted together, and they behave very differently over time.