TIPS vs I-Bonds (2026) - Same Goal, Different Mechanics
Auction-based vs limited-purchase
TIPS are auctioned regularly to anyone in any size - the same way nominal Treasury notes are sold. I-Bonds are sold only to retail investors at TreasuryDirect, with a hard $10K/person/year electronic cap (+ $5K paper via tax refund). This single difference shapes how each gets used.
| Dimension | TIPS | I-Bonds |
|---|---|---|
| Purchase venue | TreasuryDirect, any brokerage, ETFs | TreasuryDirect only (electronic); paper via tax refund |
| Annual purchase limit | Unlimited | $10K electronic + $5K paper = $15K per person per year |
| Minimum | $100 (TreasuryDirect), $1,000 (brokerage) | $25 |
| Maturity options | 5, 10, 30 years | 30 years (one term) |
| Real yield component | 1.80-2.30% fixed at purchase | 1.20% fixed at purchase |
| Inflation linkage | Principal adjusts with CPI-U (3-month lag) | Variable rate component resets every 6 months |
| Coupon payments | Semi-annual on adjusted principal | None - all interest accrues internally |
| Federal tax timing | Annual on coupon + annual on principal adjustment (phantom income) | Deferred until redemption (up to 30 years) |
| State/local tax | Exempt | Exempt |
| Liquidity year 1 | Tradeable any business day | Locked - cannot redeem |
| Early redemption penalty | None - sell at market price | 3 months interest if redeemed years 1-5 |
| IRA-eligible | Yes | No |
| Secondary market | Yes | No - only redeemable to TreasuryDirect |
The phantom-income trade-off
The single biggest functional difference: TIPS create annual taxable phantom income from their principal adjustments; I-Bonds defer all federal tax until redemption.
On $50K of TIPS held in a taxable account during a year with 3% CPI:
- Coupon income (2% on adjusted principal): ~$1,015
- Phantom income from principal adjustment: $1,500
- Total taxable: $2,515 federally (state exempt)
- Cash received: $1,015 (only the coupon)
- Tax owed at 32% bracket: $805 - of which $480 is on income you haven't received in cash
On the same $50K of I-Bonds: zero taxable income in any year until redemption. The entire 4.80% composite accrues inside the bond.
This is why TIPS go in IRAs and I-Bonds go in taxable accounts. Inside an IRA, the phantom-income problem disappears. In a taxable account, the I-Bond's deferral is materially better.
When TIPS wins
- Lump-sum deployment. $250K of inflation hedge cannot be built quickly in I-Bonds. TIPS accept any size.
- IRA holdings. No phantom-income drag. Direct CPI protection compounds tax-deferred.
- Specific maturity matching. Need cash in 7 years - 5+10 TIPS ladder structures it precisely. I-Bonds have only the 30-year maturity (with optional early redemption).
- Secondary-market trading. Sell any business day. I-Bonds lock for 12 months minimum.
- Higher real yield. Current 10-year TIPS real yield is 2.00% vs I-Bond fixed rate 1.20% - so the I-Bond's "real" component (over inflation) is 80 bps below TIPS.
When I-Bonds win
- Taxable account holding. Federal tax deferral up to 30 years vs annual phantom income.
- Small annual contributions. $5K-$15K/year fits the cap and gives extended tax-deferred compounding.
- Education savings. Federal tax exclusion if used for qualified higher-ed (income limits apply).
- No market price risk. I-Bonds always redeem at principal + accrued interest. TIPS prices move with real yields.
- Long-horizon, low-touch. Buy and forget for 20-30 years. The 30-year max term gives the longest possible federal-deferral window.
Worked example - $50K inflation hedge over 10 years, taxable account, 3% CPI
Option A: I-Bonds (built over 3-4 years to fit cap)
- Buy $30K (married couple, $15K each via electronic + paper) per year for 2 years, then $10K in year 3
- Composite rate averages ~4.50% over the 10-year horizon
- Total interest accumulated: ~$24,000
- Federal tax at redemption (year 10): ~$7,680 in single hit (32% bracket)
- State tax: $0 (exempt)
- Net after-tax gain: ~$16,320
Option B: TIPS in taxable account
- $50K of 10-year TIPS at 2.00% real yield
- 10-year cumulative coupon (on adjusting principal): ~$11,500
- 10-year cumulative principal adjustment: ~$17,000
- Annual federal tax on coupon + adjustment: ~$915/year average
- Cumulative federal tax: ~$9,150
- Final principal at maturity: ~$67,000
- Net after-tax: principal $67,000 + cumulative coupons $11,500 - taxes $9,150 - investment $50,000 = $19,350 gain
Option C: TIPS in IRA (same investment + CPI)
- Same TIPS, IRA wrapper
- No annual tax
- Final IRA value: ~$78,500 (principal + reinvested coupons)
- Tax at IRA withdrawal: depends on bracket then (typically 22-32%)
- If withdrawn lump sum at 24% bracket: net ~$59,660 after federal tax
- Net after-tax gain: ~$28,540
TIPS in IRA > TIPS in taxable > I-Bonds for this specific scenario. But for taxable-only holdings, the I-Bond (despite its cap constraint) is competitive due to deferral.
The MYGA layer
Neither TIPS nor I-Bonds compete directly with MYGAs - they're different instruments for different jobs. MYGAs pay locked nominal yields (5.25-5.65% on 3-10 year terms), with no inflation adjustment but full federal+state tax deferral. The recommended retirement fixed-income allocation typically holds all three: MYGA for yield certainty (60-75%), TIPS for IRA inflation hedge (15-25%), I-Bonds for taxable inflation hedge (10-15% capped at annual purchase limits).
FAQ
Can I have both TIPS and I-Bonds at the same time?
Yes - they're independent. The $10K I-Bond cap is separate from any TIPS holdings. Most savers using inflation protection seriously hold both.
Why does the bond market price TIPS' real yield above I-Bonds' fixed rate?
Different products with different liquidity, tax treatment, and risk profiles. TIPS are tradeable, lump-sum-eligible, and carry secondary-market price risk - all of which require a yield premium. I-Bonds are illiquid year 1, capped, and have only redemption price risk - the bond market accepts a lower fixed component because of these constraints.
Can I exchange I-Bonds for TIPS?
No. There's no tax-free exchange mechanism between Treasury securities. You'd have to redeem the I-Bond (federal tax on gain) and use proceeds to buy TIPS.
How fast can I exit each?
I-Bonds: 12-month minimum hold then 1-3 days to redeem via TreasuryDirect. TIPS: same-day sell on the secondary market through any brokerage.
Are TIPS coupons inflation-adjusted?
Yes - the coupon dollar amount grows because it's calculated as the real coupon rate times the inflation-adjusted principal. So both coupons and principal grow with CPI.
Can I gift either?
I-Bonds yes (via TreasuryDirect gift function, counts toward recipient's annual cap). TIPS yes (transferred like any other Treasury security through brokerage transfer).
Which one is more 'inflation-protective' in practice?
I-Bonds adjust faster in surging inflation (variable resets every 6 months capturing recent CPI). TIPS pass through with a 3-month lag. In 2022's CPI surge, I-Bond composites hit 9.62% while TIPS effective nominal hit ~7-8%. In stable inflation, the two are roughly equivalent.
Should I hold I-Bonds in trust accounts?
Yes - entity accounts (LLC, trust, S-corp) can each hold $10K/year of I-Bonds, multiplying the family allocation. Setup is more involved (entity must have EIN; takes 2-4 weeks). Many high-net-worth families use this structure.
Related reading
- I-Bonds vs TIPS (longer mechanics breakdown)
- I-Bonds 2026 review
- TIPS 2026 review
- TIPS vs MYGA
- I-Bonds vs MYGA
I-Bonds + TIPS for inflation tier. MYGAs for yield tier. See all three.
Hans Goldstein, independent licensed insurance producer.
Hold I-Bonds in taxable accounts up to the annual cap. Hold TIPS in IRAs for larger inflation protection. For the bulk of 3-10 year retirement cash that doesn't need CPI linkage, MYGAs from A-rated carriers pay 5.25-5.65% with full tax deferral. Worth seeing the three-way allocation 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.