I-Bonds Review (2026), The Inflation Tier of Treasury Holdings

How Series I Bonds work

Series I Savings Bonds are U.S. Treasury debt with an inflation-linked yield. The total yield (called the "composite rate") combines two components:

• Fixed rate: set at purchase and held for the life of the bond. For bonds issued May 1, October 31, 2026 the fixed rate is 0.90%. Treasury announces a new fixed rate every May 1 and November 1.
• Variable rate: tied to CPI-U inflation, resets every 6 months on May 1 and November 1. For May, October 2026 issues it is 1.67% per six months (about 3.34% annualized).

The composite rate = fixed + (2 × variable) + (fixed × variable). Here "variable" is the six-month inflation rate. For May, October 2026 issues: 0.009 + (2 × 0.0167) + (0.009 × 0.0167) = 0.0426, or 4.26%.

Purchase mechanics

• $10,000/person/year electronic. Maximum purchase per Social Security number per calendar year via TreasuryDirect.
• No more paper via tax refund. The old $5,000 paper I-Bond purchase with a federal tax refund (Form 8888) ended January 1, 2025; I-Bonds are now electronic only.
• $25 minimum. Smallest purchase increment.
• 30-year max term. Bonds earn interest for 30 years from issue date, then stop.
• TreasuryDirect only. Not available at any brokerage.

Liquidity rules

• 12-month minimum hold. Cannot redeem at all in the first year.
• 3-month interest penalty for years 1-5. Redeem between year 1 and year 5 = lose the most recent 3 months of interest.
• No penalty after year 5. Redeem any amount any time, no forfeiture.

Tax treatment

• Federal: tax-deferred until redemption. No annual 1099-INT. Interest accrues inside the bond untaxed. At redemption, full accrued interest is reported as 1099-INT in that tax year.
• State and local: exempt. Under 31 U.S.C. §3124.
• Education exclusion. If proceeds are used for qualified higher-education expenses (and bond owner is 24+ at purchase), federal tax can be excluded entirely (income limits apply).
• Election to report interest annually. You can choose to report interest each year instead of deferring. Almost never optimal.

When I-Bonds make sense

1. Inflation-protected tier of fixed income. The variable rate ensures purchasing-power maintenance over long horizons. Pair with nominal bonds for diversification.
2. Education savings outside 529. If you'll use proceeds for college and stay under the income phase-out, federal tax is fully excluded.
3. Long-horizon tax deferral. Buying I-Bonds for a child or grandchild who'll redeem 20-30 years out gives extended federal deferral.
4. $10K-$30K/year savings discipline. The annual cap forces consistent dollar-cost averaging into Treasury exposure.
5. Backup emergency tier (after year 1). Once past the 12-month lockup, I-Bonds become quasi-liquid (3-month penalty), and they pay a real yield above inflation.

When I-Bonds don't make sense

1. Lump-sum deployment. $10K/year cap means you can't deploy $250K in I-Bonds quickly. Other instruments handle lump sums.
2. Liquidity needs in year 1. Absolutely locked for 12 months. Use HYSA or T-bills for emergency cash.
3. Higher-yield alternative beats inflation. A-rated 5-year MYGAs paid about 5.50-6.05% on October 14, 2026 (public carrier rate sheets) with a full term lock and tax deferral. For 3-10 year retirement money, the I-Bond's 4.26% trails by roughly 155-175 bps and its CPI linkage is uncertain over those horizons.
4. Plan to redeem in years 2-3. Losing 3 months of interest on a 24-month hold is a meaningful drag.
5. Already maxed out tax-advantaged retirement accounts. 401(k), IRA, and HSA usually offer better tax-treatment per dollar.

The MYGA contrast

An A-rated 5-year MYGA at 5.50-6.05% (public carrier rate sheets, October 14, 2026) pays roughly 155-175 bps more than the 4.26% I-Bond composite, with no $10K cap, full federal AND state tax deferral (vs. I-Bond's federal-only deferral; state is already exempt), and a locked rate that doesn't reset if inflation cools. The trade-off: MYGAs don't adjust to inflation. If CPI runs at 5%+, the I-Bond's variable component will quickly outpace the MYGA's locked rate. If CPI runs at 2-3% (current Fed target), the MYGA wins.

The typical recommendation: use I-Bonds as the inflation-protection tier (max out $10K/year per person), use MYGAs for the lump-sum, locked-rate, tax-deferred 3-10 year bucket. They complement rather than compete.

Worked example: $30K married couple, 10-year hold

Hypothetical: a married couple buys $20K/year electronic ($10K each) for 10 years = $200K of purchases, at varying composites assumed to average about 4.25%.

Estimated total value at year 10: roughly $250,000 (higher or lower depending on the CPI path).

Tax treatment: Zero federal income tax during accumulation. At redemption in year 10, the gain (roughly $50K) is reported on 1099-INT in that year. Couple can elect to spread some redemption across multiple years to manage bracket exposure.

The same $200K deployed gradually into 5-year MYGAs at an assumed 5.90% (mid-range of the September 24, 2026 A-rated market) would generate roughly $20,000-$25,000 more in nominal value at year 10, if inflation stays moderate. If inflation averages above 5%, the I-Bond approach catches up or wins.

FAQ

How is the I-Bond composite rate calculated?

Composite = Fixed + (2 x Variable) + (Fixed x Variable). The variable rate is the annualized 6-month CPI-U change. Treasury resets both rates every May 1 and November 1.

Can I buy more than $10K/year?

Yes, through entity ownership. An LLC, S-corp, trust, or estate can each buy $10K/year as a separate 'person.' (The old $5K paper-via-tax-refund route ended January 1, 2025.) Many high-income households use trusts to multiply allocation.

What happens at year 30?

I-Bonds stop earning interest at year 30 (final maturity). You should redeem before then to avoid losing further compounding. There's no penalty for redeeming after year 5.

Are I-Bonds taxed when I redeem?

Yes. The full accumulated gain is reported on a 1099-INT in the year of redemption. Federal income tax applies at ordinary income rates. State and local tax does not apply (31 USC 3124 exemption).

Can I gift I-Bonds?

Yes. Via TreasuryDirect, you can gift bonds to another account holder. The gift counts against the recipient's $10K annual limit in the year delivered, not the year purchased.

Are I-Bonds better than TIPS?

Different tools. I-Bonds are limited to $10K/year, illiquid for 12 months, accumulate tax-deferred, and have no secondary market. TIPS have no purchase cap, trade on the secondary market, pay coupons twice yearly (with annual tax), and adjust principal for inflation. I-Bonds win for small annual contributions; TIPS win for lump-sum deployment.

What's the current fixed rate trend?

Fixed rates have been 0.00% to 1.30% throughout the post-2020 era; the rate for bonds issued May 1, October 31, 2026 is 0.90%. Higher real-rate environments (like 2024-2026) tend to support higher fixed rates. Treasury sets the rate based on real yields in the TIPS market and broader rate conditions.

Can I hold I-Bonds in an IRA?

No. I-Bonds are only purchasable in personal TreasuryDirect accounts (individual, joint, entity). IRA custody isn't possible. To get inflation protection inside an IRA, use TIPS or a TIPS ETF (SCHP, VTIP, TIP).

Related reading

• I-Bonds vs TIPS: mechanics differ
• I-Bonds vs MYGA: inflation vs locked rate
• TIPS 2026 review
• TreasuryDirect platform review
• State tax on Treasury interest

Max out your I-Bond allocation, then look at MYGAs for the rest

Hans Goldstein, independent licensed insurance producer.

I-Bonds are the right inflation-protection tier and you should max the $10K/person/year. For the lump-sum cash above that limit (the 6-figure cash sitting in HYSAs or T-bills), MYGAs from A-rated carriers paid about 5.50-6.05% for 5-year terms on October 14, 2026 (public carrier rate sheets), with locked rates and full tax deferral. That's meaningfully above the 4.26% I-Bond composite when inflation runs cool.

Send your details and within one business day you'll get a written side-by-side: the Treasury option vs. the top 3 MYGAs from A-rated carriers at the same term, end-of-term math at your actual dollar amount, and after-tax yield computed at your state bracket. We’ll email it to you.

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Hans Goldstein · 213-414-2808 · NPN 20602398, independent licensed insurance producer appointed with multiple A-rated carriers

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Disclosure

This review reflects publicly available Treasury auction results, TreasuryDirect documentation, and approximate market yields as of the date stated above. Treasury yields change daily; current yields differ from prior auctions and may differ from those shown here. This article is general information for educational purposes; it is not a personalized recommendation, solicitation, or offer of any specific security or insurance product. U.S. Treasury securities are backed by the full faith and credit of the United States Government. MYGA references compare Treasury yields against approximate rates from A-rated insurance carriers as of the date stated; carrier rates change monthly. State guaranty fund coverage on annuities is provided by the state insurance department and varies by state (typically $250,000-$300,000 per owner per carrier). Hans Goldstein is an independent licensed insurance producer (NPN 20602398) appointed with multiple A-rated annuity carriers; he is NOT a registered investment advisor, broker-dealer, or registered representative, and is not paid by the U.S. Treasury, TreasuryDirect, or any brokerage for this review. No compensation has been received from any third party in connection with this content. Always read the actual offering documents and consult a licensed advisor before purchasing any security or annuity. Tax discussion of 31 U.S.C. §3124 and Internal Revenue Code provisions reflects law as of 2026 and is subject to change.