Retirement & Income

By the Retiree Report Editorial Team · Updated 2026-05-28 · 7 min read

This article is general information, not financial, tax, or legal advice. Consult a licensed professional before acting on it.

I bonds, TIPS, and CDs in 2026: which one belongs in your cash reserve

If you’ve been sitting on too much money in a 0.38% savings account, you’re not alone — and 2026 has finally given retirees three legitimate options to do better. The May 2026 Series I savings bond pays a composite 4.26%, newly issued 10-year TIPS auctioned with a real yield above 2.1%, and the best one-year CDs are advertising in the 4% range. Each of those works on a different premise. Choosing the wrong one for the wrong dollar can cost you real money in taxes, lockup, or lost interest.

How the May 2026 numbers actually compare

The headline is straightforward. Series I bonds issued between May 1 and October 31, 2026 pay a 4.26% composite rate for their first six months, broken into a 0.90% fixed rate that stays with the bond for its 30-year life and an annualized 3.34% inflation component that resets every May and November. The 10-year TIPS auctioned on May 21 went out at roughly 2.17% real yield, which means about 2.17% above whatever CPI does over the next decade, per the Treasury’s daily real yield curve. And the FDIC’s national-average deposit rates for May 2026 sit at just 1.55% for a one-year CD and 1.34% for a five-year, though competitive online and brokered offerings climb into the 3.75%-to-4.30% range if you actually shop.

So a saver isn’t picking between bad options. The question is what you’re protecting that cash against — surprise inflation, a future medical bill, a known tax payment, or simply the temptation to spend it on something else.

What makes I bonds attractive — and where they pinch

I bonds remain the cleanest inflation hedge a retail buyer can own. Interest compounds tax-deferred until you redeem (federal only — they’re exempt from state and local tax), and that compounding inside a tax-deferred wrapper matters more for retirees in higher brackets than people often think. There’s no market price risk, no broker, no expense ratio.

The annual cap is the catch. You can only buy $10,000 per person per year electronically through TreasuryDirect, plus another $5,000 in paper bonds purchased with your federal tax refund using IRS Form 8888. A married couple can stack to $30,000 a year if both spouses max out and overpay their taxes deliberately — workable, but no one’s funding a whole emergency reserve in a single calendar year.

Lockup is the second catch. You can’t redeem an I bond at all for the first 12 months, and if you cash out before five years you forfeit the last three months of interest. For most readers that’s a manageable penalty; on a 4.26% bond, three months of interest is roughly 1% of principal, comparable to a typical bank CD early-withdrawal hit.

The fixed-rate piece deserves emphasis: 0.90% locked in on a May 2026 purchase is the part you keep forever, no matter where inflation drifts.

Are TIPS worth the paperwork at a 2.17% real yield?

A 10-year TIPS bought at the May 21 auction promises CPI plus about 2.17% per year for a decade. That’s a real return — meaning above inflation — that beats anything I bonds, CDs, or money market funds will likely deliver over the same window if the Bureau of Labor Statistics’ CPI print averages even modestly above 2%. The principal adjusts twice a year with inflation, and at maturity you receive either the inflation-adjusted value or the original principal, whichever is greater.

The catch with TIPS is the tax treatment, and it’s the part most retiree-focused articles undersell. Each year the Treasury adjusts the principal of your TIPS upward to track CPI, and the IRS treats that adjustment as taxable interest in the year it happens — even though no money has hit your bank account yet. That’s the so-called phantom income problem. It’s why most planners suggest holding individual TIPS inside a traditional IRA or Roth, where the annual reconciliation never reaches your 1040.

Would you rather skip the per-bond math entirely? TIPS mutual funds and ETFs (Schwab, Vanguard, and iShares all run them) bundle the same exposure with daily liquidity. You give up the maturity guarantee — at any moment a TIPS fund can be marked down a few percent — but you also dodge the paperwork and can sell whenever you want.

For an income-focused retiree with cash held outside a tax-advantaged account, a five- or ten-year TIPS bought through a brokerage account and held to maturity is one of the only ways to lock in a guaranteed real return on a known horizon. Just don’t put it in your taxable bucket if you have IRA space available.

Where CDs still earn their place

CDs sound boring next to inflation-linked Treasuries, and the FDIC’s national averages are genuinely uncompetitive. The top of the CD market is a different story. If you know you’ll write a $40,000 check to a contractor next March, locking the money in a 9- or 12-month brokered CD at roughly 4% earns you about $1,200 of safe interest with no principal risk and no inflation guesswork.

Brokered CDs deserve a separate note. Bought through Fidelity, Schwab, or Vanguard, they typically pay more than what your neighborhood bank advertises, and they keep you under the $250,000-per-bank FDIC deposit insurance limit automatically because the brokerage spreads larger balances across multiple issuing banks. The tradeoff is that brokered CDs generally have no bank-style early-withdrawal penalty — you sell on the secondary market instead, where the price moves with prevailing rates. If rates have climbed since you bought in, you’ll take a haircut to exit early. That’s a feature for a buy-and-hold reader and a bug for someone who might need the cash on short notice.

CDs also lose to I bonds and TIPS on taxes. Every dollar of CD interest is fully taxable federally and at the state level, with no shelter for inflation. In a high-tax state, an advertised 4.10% CD can net out closer to 3% after federal and state tax — sometimes less than the after-tax math on a comparable I bond. The Consumer Financial Protection Bureau’s general guidance on savings products is a fair starting point if you want to read the fine print yourself before signing up.

Matching the right wrapper to the right pile of cash

The honest answer is that most retirees should own some of all three, in different mental buckets, for different jobs. Why all three? Because each one does something the other two don’t.

For your everyday emergency cash that you might genuinely need in a hurry, a high-yield savings account or a Treasury money market fund still wins on access — those instruments aren’t paying nothing in 2026, and the liquidity is worth the modest yield gap. Put the I bond purchase in the tier behind that: money you don’t expect to touch for at least 12 months but want shielded from any inflation surprise. Use TIPS, ideally inside an IRA, for cash you’ve designated for spending five to ten years out (think a planned home repair, a future car, your long-term healthcare reserve). And use CDs for known, dated expenses where you want the exact maturity to line up with the bill.

One mistake worth flagging: never park cash you’ll need before 12 months in I bonds. Treasury enforces that lockup with no exceptions, and even disaster relief requires the bond to be at least a year old.

A second worth flagging. If you’re already drawing Social Security, watch how interest income stacks on top of your other taxable distributions. Both CD and TIPS interest count as ordinary income and can push you across an IRMAA bracket, raising your Medicare Part B and Part D premiums two years later. The same dollar of interest isn’t equally expensive in every bucket — which is part of the broader conversation about the most tax-efficient order to spend your retirement accounts.

For a deeper read on how guarantees and locked-in income fit alongside these instruments, the retiree’s honest look at annuities is worth a few minutes. None of this is investment advice, and none of it replaces a conversation with a fiduciary planner who can see your whole picture, your tax bracket, and your spouse’s situation alongside it.

What to remember

I bonds give you 4.26% with built-in inflation protection and a small but real federal tax shelter, capped at $10,000 a year per person through TreasuryDirect. TIPS lock in a real yield above CPI but generate phantom income, so they generally belong in a tax-advantaged account. CDs still pay competitively at the top of the market and are the right tool when you know exactly when you’ll need the money back. If you’ve been earning 0.38% on a savings account this whole time, any of the three is a step up — and most retirees end up using a mix of them.