The short answer: after the May 2026 announcement, new Series I savings bonds look reasonable for inflation-protected cash that can stay untouched for at least one year, but they are not an automatic buy for money you may need soon. TreasuryDirect lists the new composite rate at 4.26% for I bonds issued from May 1, 2026 through October 31, 2026, including a 0.90% fixed rate (TreasuryDirect, 2026).

What changed in May 2026?

I bonds have two rate pieces: a fixed rate that stays with the bond for its full life, and an inflation rate that resets every six months. TreasuryDirect says the fixed rate for new May 2026 through October 2026 I bonds is 0.90%, while the semiannual inflation rate is 1.67% (TreasuryDirect, 2026).

That matters because the 0.90% fixed rate is permanent for bonds bought during this window. The inflation adjustment will keep changing, but the fixed portion remains attached to that bond until it is redeemed or reaches 30 years.

The inflation component is based on changes in the non-seasonally adjusted Consumer Price Index for All Urban Consumers, or CPI-U, which is published by the U.S. Bureau of Labor Statistics (BLS, 2026). That means the future I bond rate can move up or down with inflation.

Should you buy now?

Consider buying if the money is part of your medium-term safe savings bucket, not your checking cushion. TreasuryDirect says electronic I bonds have a $25 minimum purchase and an annual electronic purchase limit of $10,000 per Social Security number (TreasuryDirect, 2026).

A new I bond can make sense if you want:

  • Inflation-linked interest backed by the U.S. Treasury.
  • A fixed real-rate component of 0.90% locked in for the life of the bond.
  • State and local income tax exemption on the interest.
  • Federal tax deferral until redemption or maturity, in most cases.

But the trade-off is liquidity. TreasuryDirect says you cannot redeem an I bond during the first 12 months, and if you redeem before five years, you lose the last three months of interest (TreasuryDirect, 2026). For emergency cash, that one-year lockup is a real constraint.

As of July 2026, compare the I bond rate with current high-yield savings accounts, Treasury bills, money market funds, and CDs before deciding, since terms and yields change frequently.

Read also: How to Invest in US Treasury Bonds with Little Money

Should you redeem older I bonds?

Redeeming can make sense if your older bond has a low fixed rate, you are past the 12-month lockup, and the after-penalty return no longer beats other safe options available to you. Many I bonds bought during the 2021 and 2022 surge had a 0.00% fixed rate, so their future return depends entirely on inflation resets.

Before redeeming, check three things.

First, confirm the bond’s current composite rate in TreasuryDirect. Older bonds do not all earn the same rate because the fixed rate depends on the issue period.

Second, check the age of the bond. If it is less than five years old, the value shown in TreasuryDirect already excludes the last three months of interest because of the early redemption penalty (TreasuryDirect, 2026).

Third, consider taxes. TreasuryDirect says I bond interest is subject to federal income tax but not state or local income tax, and most people defer reporting the interest until they redeem the bond or it matures (TreasuryDirect, 2026). A large redemption could increase your taxable interest for the year, so consult a CPA for personal tax questions.

Bottom line

Buy after the May 2026 announcement if you want Treasury-backed inflation protection, can accept the 12-month lockup, and value the 0.90% fixed rate. Hold older I bonds if their fixed rate is attractive or the tax timing matters. Consider redeeming low-fixed-rate older bonds if they are past the lockup and better safe yields are available elsewhere after accounting for the three-month penalty and federal taxes.

This article is educational and is not personalized investment, legal, or tax advice. Verify current TreasuryDirect terms and market yields before making a decision.