Inflation-protected bonds come in two flavors, and people constantly confuse them. I bonds and TIPS both shield you from rising prices, but they're built for different jobs: one is a simple personal savings product with strict limits, the other is a tradable market security with no cap and real complexity. Pick the wrong one and you'll fight liquidity rules or an ugly tax bill. Here's the honest 2026 comparison.
What changed in 2026
- The inflation conversation cooled but didn't end, keeping both instruments relevant as portfolio insurance rather than panic buys.
- TIPS real yields stayed positive, meaning you can lock in inflation +a real return — historically attractive.
- I bond rates reset with each six-month inflation reading; the fixed-rate component became the thing savvy buyers watch.
The core difference
| Feature |
I bonds |
TIPS |
| What it is |
Government savings bond |
Marketable Treasury security |
| Where to buy |
Treasury directly (electronic) |
Brokerage or Treasury auction |
| Purchase limit |
Capped per person per year |
Effectively unlimited |
| Liquidity |
Locked 1 year; penalty before 5 |
Tradable anytime (price varies) |
| Can lose nominal value? |
No |
Yes, before maturity (market price) |
| How inflation adjusts |
Rate resets every 6 months |
Principal adjusts with CPI |
| Tax timing |
Defer until redemption |
Annual "phantom income" tax |
How I bonds work
I bonds earn a combined rate: a fixed rate (set at purchase, stays for the life of the bond) plus a variable inflation rate that resets every six months. They can never lose nominal value, can't be redeemed in the first year, and lose three months' interest if redeemed before five years. Purchases are capped per person per year. See Series I bonds guide in 2026.
Best for: personal emergency-adjacent savings, a guaranteed-not-to-fall inflation hedge, and anyone who values simplicity over scale.
How TIPS work
TIPS are regular Treasury bonds whose principal adjusts with inflation (CPI). You receive interest on the adjusted principal, and at maturity you get the inflation-adjusted principal back. Because they trade on the open market, their price moves with real interest rates — so you can see a paper loss if you sell early. There's no purchase limit.
Best for: larger inflation-protected allocations, retirement portfolios, and investors comfortable with market pricing.
The tax wrinkle (important)
- I bonds defer tax on interest until you redeem — and may be tax-free if used for qualified education. They're naturally tax-efficient.
- TIPS create "phantom income": the annual inflation adjustment to principal is taxable each year even though you don't receive it as cash until maturity. That's why TIPS belong in tax-advantaged accounts (IRA, 401(k)) — holding them in a taxable account means paying tax on money you haven't pocketed.
How to pick
- Want simple, set-and-forget personal savings? I bonds — within the annual limit.
- Need to protect a large sum? TIPS — no cap.
- Holding in a taxable account? Lean I bonds (deferred tax) over TIPS (phantom income).
- Holding in an IRA/401(k)? TIPS fit cleanly and scale.
- Want both flexibility and a floor? Combine: I bonds up to the limit for the no-loss core, TIPS for the rest.
Common mistakes
Holding TIPS in a taxable account. The phantom-income tax drag erodes the benefit. Use tax-advantaged space.
Buying I bonds and needing the cash in 11 months. They're locked for a year — don't park true emergency money you might need sooner.
Judging on headline yield only. I bond rates reset; TIPS prices move. Match the instrument to liquidity and tax needs, not last quarter's rate.
Treating either as a growth investment. These are inflation insurance, not your portfolio's growth engine. See Asset allocation by age in 2026.
What to skip
- Going all-in on inflation bonds. They're a sleeve, not the whole portfolio.
- TIPS mutual funds in taxable accounts without checking the tax treatment.
- Redeeming I bonds in year 2–5 unless necessary — you forfeit three months' interest.
FAQ
Which is safer?
Both are government-backed. I bonds can't lose nominal value; TIPS can fluctuate in price if sold before maturity — but held to maturity, both return inflation-adjusted principal.
Can I lose money on TIPS?
On paper, yes, if you sell before maturity and real rates rose. Held to maturity, you get inflation-adjusted principal back.
How much can I put in I bonds?
There's an annual per-person cap; check the current limit before buying. TIPS have no practical cap.
Should I own both?
Often yes — I bonds for the simple no-loss core, TIPS (in tax-advantaged accounts) for scale.
Where to go next
See Series I bonds guide in 2026, How to buy Treasury bonds in 2026, and Recession-proof portfolio in 2026.