Short answer: I bonds in 2026 are worth it for money you want to protect from inflation and can leave alone for at least a year — especially because the 0.90% fixed rate is the highest since 2007.
The numbers in 2026
| Feature | Series I bond (2026) |
|---|---|
| Composite rate | 4.26% |
| Fixed rate (locked for life) | 0.90% |
| Annual purchase limit | $10,000 per person |
| Minimum hold | 12 months |
| Early-cash penalty | 3 months interest if under 5 years |
| State/local tax | Exempt |
The case for buying
- Best fixed rate in ~18 years. A 0.90% fixed rate stays with the bond for 30 years. Compare that to the 0.00% fixed rate stretches of 2008–2022 in the fixed-rate history.
- Inflation protection. If inflation rises again, the composite rate rises with it.
- No nominal loss. The composite rate is floored at 0%, so you never lose principal.
- Tax perks. Exempt from state and local tax; federal tax is deferred until you cash; an education exclusion can make it tax-free for college.
The case against (or for waiting)
- $10,000/year cap limits how much you can deploy.
- 12-month lock-up — not for money you might need soon.
- Variable rate — the inflation half resets every 6 months and can fall.
Bottom line
I bonds are a solid home for inflation-protected savings in 2026, not a growth engine. Use the value calculator to model a purchase, and weigh them against EE bonds if you can commit for 20 years. This is general information, not investment advice.