How to Buy I Bonds in 2026 (Treasury Savings Bonds Guide)

I Bonds are savings bonds issued by the U.S. government that are designed to keep pace with inflation. Here’s what they are, how they work, and whether they’re worth buying in 2026.

What Are I Bonds?

Series I Savings Bonds (I Bonds) are issued by the U.S. Treasury. Their interest rate is tied to inflation — specifically the Consumer Price Index (CPI-U). The rate adjusts every six months based on inflation data.

I Bonds carry zero default risk because they’re backed by the full faith and credit of the U.S. government. They’re one of the safest savings vehicles available.

How the I Bond Interest Rate Works

The I Bond interest rate has two components:

1. Fixed rate — Set when you buy the bond; stays constant for the life of the bond
2. Inflation rate — Adjusts every May and November based on CPI data

The combined composite rate changes twice a year. During high-inflation periods (like 2021-2023), I Bond rates were extremely attractive — over 9% at peak. In 2026, rates have normalized but still represent a competitive savings vehicle when inflation is above baseline.

Check TreasuryDirect.gov for the current I Bond rate before buying.

I Bond Purchase Limits

• Online (TreasuryDirect.gov): $10,000 per person per calendar year
• Paper bonds (via tax refund): Additional $5,000 per year
• Trusts and businesses: Can purchase additional amounts

The limit applies per Social Security number. Couples can buy $10,000 each ($20,000 total), plus $5,000 more via each spouse’s tax refund.

How to Buy I Bonds

Step 1: Create a TreasuryDirect Account

Go to TreasuryDirect.gov and open an account. You’ll need:

• Social Security number
• U.S. bank account (for funding and receiving proceeds)
• Email address

The site isn’t modern, but it works. The account opening process takes about 15 minutes.

Step 2: Buy the Bond

Once your account is open, select “BuyDirect” and choose Series I. Enter the amount and confirm. Funds transfer from your linked bank account within a few business days.

Step 3: Hold and Track

Your bonds appear in your TreasuryDirect account dashboard with their current value and interest earned. You can’t sell them on a secondary market — you must redeem through TreasuryDirect.

I Bond Rules and Restrictions

Holding Period

• Minimum hold: 1 year (can’t redeem before 12 months)
• Early redemption penalty: Lose 3 months of interest if you redeem before 5 years
• No penalty after 5 years
• Bonds stop earning interest after 30 years

Tax Treatment

• Interest is subject to federal income tax
• Interest is exempt from state and local taxes
• You can choose to report interest annually or defer until redemption (most people defer)
• Interest used for qualified education expenses may be federally tax-exempt (income limits apply)

Are I Bonds Worth Buying in 2026?

It depends on current rates and your alternatives. I Bonds make sense when:

• The composite rate exceeds what you’d get from high-yield savings accounts or CDs
• You’re looking for a guaranteed, inflation-adjusted return with zero default risk
• You have a 1–5 year time horizon for funds you don’t need immediately
• You want to diversify away from market risk

I Bonds are not ideal for funds you might need within 12 months, or if you need the flexibility to access cash quickly.

Compare the current I Bond rate against: high-yield savings accounts, 12-month CDs, and short-term Treasury bills (4-week to 52-week T-bills) before deciding.

The Bottom Line

I Bonds are a unique, government-backed savings tool with inflation protection. They’re not for everyone — the purchase limits, 1-year lockup, and TreasuryDirect interface friction make them better for deliberate savers than casual investors. But for emergency funds beyond your immediate liquidity needs, or as a conservative bond allocation, they’re worth considering.