I-Bonds vs TIPS (2026) - Two Inflation Tools, Different Designs
Same goal, different design
Both Series I Savings Bonds and Treasury Inflation-Protected Securities (TIPS) deliver inflation-adjusted real yields, but they're built for completely different use cases. I-Bonds are a small-batch, retail-oriented tax-deferral vehicle. TIPS are an institutional-grade tradeable security available in any size.
| Dimension | I-Bonds | TIPS |
|---|---|---|
| Yield structure | Fixed (1.20%) + CPI variable | Real yield (~1.80% 5yr, ~2.00% 10yr) + principal CPI adjustment |
| Current effective yield (2026) | ~4.80% composite | ~4.10-4.50% nominal with inflation pass-through |
| Annual purchase limit | $10K electronic + $5K paper | Unlimited |
| Minimum purchase | $25 | $100 (TreasuryDirect) or $1,000 (brokerage) |
| Maturity options | 30 years (one option) | 5, 10, 30 years |
| Coupon payments | None - all interest accrues internally | Semi-annual on inflation-adjusted principal |
| Federal tax timing | Deferred until redemption | Annual on coupon + annual on principal adjustment (phantom income) |
| State and local tax | Exempt | Exempt |
| Liquidity year 1 | Locked | Tradeable any business day |
| Early redemption penalty | 3 months interest (yrs 1-5) | None - sell at market price |
| IRA-eligible | No | Yes |
| Where to buy | TreasuryDirect only | TreasuryDirect, any brokerage, ETFs |
| Inflation deflation handling | Composite has floor at fixed rate (no negative) | Principal can adjust down with negative CPI; redeemed at original par minimum |
The phantom income problem with TIPS
TIPS adjust their principal upward for inflation. That principal adjustment is reportable as taxable interest income in the year it accrues - even though you don't receive the cash until maturity or sale. This "phantom income" hits your 1099-INT every year you hold a TIPS in a taxable account.
Example: You buy $100K of 10-year TIPS. Year-1 CPI runs 3%. Your principal adjusts to $103,000. You owe federal tax on $3,000 of phantom income, even though no cash hit your account. The coupon (paid on the adjusted principal) is also taxable.
This is the single biggest reason TIPS are usually held inside IRAs, not taxable accounts. Inside an IRA, the phantom income is irrelevant - tax-deferred wrappers ignore it. In a taxable account, it creates annual tax friction that erodes the inflation-protection benefit.
I-Bonds avoid this entirely - all accumulation is internal, federal tax is deferred until redemption, and you choose when to recognize the gain.
When the I-Bond wins
- Annual contributions of $10K-$15K. The cap is the cap. Fits.
- Long-horizon tax deferral. Buying for a child or grandchild 20-30 years out gives full federal deferral.
- Taxable account. Avoids the TIPS phantom-income problem entirely.
- Education savings outside 529. Federal tax exclusion if used for qualified higher-ed.
- Pure-Treasury safety with no market price risk. I-Bonds always redeem at face + accrued interest. TIPS prices fluctuate with real yields.
When TIPS win
- Lump-sum deployment. $100K, $500K, $1M of inflation protection cannot be built in I-Bonds quickly. TIPS accept the full amount.
- IRA holdings. TIPS work great inside IRAs (phantom income disappears). I-Bonds aren't IRA-eligible.
- Specific maturity needs. TIPS come in 5, 10, 30-year maturities for known cash needs. I-Bonds are all 30-year with optional early redemption.
- Secondary-market liquidity. Sell any business day. I-Bonds require 12-month minimum hold.
- Portfolio-grade exposure. TIPS ETFs (SCHP, VTIP, TIP) give one-click inflation exposure in any account, taxable or retirement.
Worked example - 10-year inflation protection for $250K
Option A: Pure I-Bonds (impossible to deploy $250K immediately)
Maximum I-Bond purchase: $15K/person/year. Married couple: $30K/year. To deploy $250K takes 8-9 years. Not viable for a lump-sum need.
Option B: TIPS in IRA
- Buy $250K of 10-year TIPS at 2.00% real yield, current CPI 2.4%
- Effective nominal yield: ~4.40%
- Inside IRA: no annual tax. Principal adjustments accumulate; semi-annual coupons reinvest.
- 10-year value at 2.4% CPI flat: roughly $385K
- At 4% CPI: roughly $440K
- At 1% CPI: roughly $350K
Option C: TIPS in taxable + max I-Bonds annually
- $210K into 10-year TIPS in taxable account (annual phantom-income tax drag)
- $40K reserved for $30K-$40K annual I-Bond contributions
- Effective after-tax yield slightly below Option B in taxable account due to phantom income
The MYGA contrast
Neither I-Bonds nor TIPS lock a rate. They both adjust with CPI - which is the whole point. A MYGA locks a nominal rate (5.25-5.65% for 3-10 year terms), without inflation adjustment. If you believe inflation will run above 5%, I-Bonds and TIPS will outperform. If you believe inflation will stay at Fed-target 2-3%, the locked MYGA wins.
The diversified answer: hold all three in different tiers. Max I-Bonds annually for small-batch inflation protection. Hold TIPS inside IRAs for larger inflation protection. Use MYGAs for the lump-sum, locked-rate, taxable-account portion of fixed income.
FAQ
Are TIPS state-tax exempt like I-Bonds?
Yes - all Treasury securities including TIPS are exempt from state and local income tax under 31 U.S.C. Section 3124. The coupon interest AND the inflation-adjustment income are both exempt.
Can I hold TIPS in an IRA?
Yes - any brokerage IRA can hold TIPS. This is generally the preferred location because IRA wrapping eliminates the phantom-income tax issue.
What's the phantom income problem exactly?
TIPS principal adjusts upward for inflation each year. That adjustment is reportable as taxable interest even though you don't receive the cash until maturity or sale. In a taxable account, this creates annual tax liability without matching cash flow.
Can TIPS principal go down?
Yes, in deflation. CPI-U negative readings can adjust the principal downward. However, at maturity TIPS pay the greater of adjusted principal or original par - so you can never receive less than your original face value at maturity.
Are I-Bonds or TIPS better in high-inflation periods?
Roughly equivalent for inflation pass-through, but I-Bonds had higher composite rates during the 2022 CPI surge because the variable rate uses a different lookback. In May 2022 the I-Bond composite was 9.62% while 10-year TIPS real yields were near zero (effective ~4-5% with CPI pass-through).
Which has more secondary-market liquidity?
TIPS - they trade actively on the secondary market with tight bid-ask spreads. I-Bonds cannot be sold on a secondary market at all; you can only redeem to TreasuryDirect.
What's a TIPS ETF and when should I use one?
Funds like SCHP (Schwab US TIPS), VTIP (Vanguard short-TIPS), TIP (iShares TIPS) hold portfolios of individual TIPS at ~5-7 bps expense ratio. Use them for instant diversified inflation exposure, especially in taxable accounts where the fund manages distributions to minimize phantom-income recognition. For very large positions, direct TIPS ownership can be more tax-efficient.
Can I 1035 exchange between TIPS, I-Bonds, and MYGAs?
No. 1035 exchanges are limited to annuity-to-annuity and life insurance transfers. Treasury securities cannot be exchanged in the 1035 sense - you'd have to sell and rebuy, triggering tax recognition.
Related reading
Pick I-Bonds OR TIPS based on account type and contribution size
Hans Goldstein, independent licensed insurance producer.
I-Bonds for $10K-$30K/year personal contributions, taxable accounts only. TIPS for lump-sum deployment and IRA holdings. For the lump-sum, locked-rate, taxable cash that doesn't fit either, MYGAs from A-rated carriers pay 5.25-5.65% with full tax deferral. Worth seeing the three-way comparison at your numbers.
Drop your info and within 24 hours 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. No pitch, no follow-up calls unless you ask.
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.