If you’re losing sleep over inflation quietly shrinking your savings, two government tools are built specifically to fight it: I Bonds and TIPS. The question of I Bonds vs TIPS in 2026 comes down to one trade-off — I Bonds are simpler and tax-friendlier but capped at $10,000 a year, while TIPS have no purchase limit and trade freely. Here’s exactly which one fits your money.
Both are backed by the full faith of the U.S. government. Both adjust with inflation by design. Neither will make you rich — that’s not the point. The point is making sure the dollars you spent decades saving still buy what they’re supposed to ten years from now.
What I Bonds Actually Do
Series I savings bonds pay a rate that combines a fixed rate (locked for the life of the bond) and an inflation rate that resets every six months based on the Consumer Price Index. When inflation rises, your I Bond rate rises with it.
The catches are simple: you can buy a maximum of $10,000 per person per year through TreasuryDirect, you must hold for at least one year, and if you cash out before five years you forfeit three months of interest. The big upside — they’re exempt from state and local income tax, and federal tax is deferred until you cash out.
What TIPS Actually Do
Treasury Inflation-Protected Securities work differently. Instead of adjusting the interest rate, TIPS adjust the principal. As the CPI rises, the bond’s principal grows, and your fixed interest rate is paid on that larger amount. At maturity you get the inflation-adjusted principal back.
TIPS have no purchase cap — you can put $200,000 into them if you want — and they trade on the open market, so you can sell anytime. The trade-off: the annual inflation adjustment to principal is taxable each year even though you don’t receive it until maturity (the “phantom income” problem), which makes TIPS best held inside an IRA or 401k.
I Bonds vs TIPS: The Head-to-Head
- Purchase limit: I Bonds capped at $10,000/year per person. TIPS unlimited.
- Taxes: I Bonds defer federal tax and skip state tax entirely. TIPS owe annual tax on phantom income — hold them in a retirement account.
- Liquidity: I Bonds locked one year, penalty before five. TIPS sellable anytime on the market.
- Simplicity: I Bonds are set-and-forget. TIPS require a brokerage and a little more attention.
Want to see what inflation would do to that money if you didn’t protect it? Run it through the TTF inflation calculator — the gap is usually bigger than people expect.
So Which One Should You Buy in 2026?
For most savers in their 50s and 60s, the answer is both, in order:
- Max your I Bonds first. $10,000 per person ($20,000 for a couple) of simple, state-tax-free inflation protection in a taxable account. It’s the cleanest dollar you can deploy.
- Use TIPS for the rest, held inside your IRA or 401k to sidestep the phantom-income tax, when you want to protect more than the I Bond cap allows.
This is the same inflation-protection bucket I described in where to put $100K right now — these two tools are how you fill it.
The One Mistake to Avoid
Don’t put money you’ll need within a year into either one. I Bonds are locked for 12 months minimum, and TIPS prices swing in the short term when interest rates move. These are inflation insurance for your 3-to-10-year money — not your emergency fund. Keep your short-term cash in high-yield savings and Treasury bills instead.
Frequently Asked Questions
Are I Bonds or TIPS better in 2026?
For amounts up to $10,000 per person, I Bonds are usually better — simpler, state-tax-free, and federal tax deferred. For larger amounts, TIPS are the answer because they have no purchase cap. Most savers use I Bonds first, then TIPS for anything above the cap.
How much can I put in I Bonds per year?
$10,000 per person per calendar year through TreasuryDirect.gov. A married couple can buy $20,000 combined. You can add another $5,000 using a federal tax refund, for up to $15,000 per person in a year.
Do TIPS protect against inflation better than I Bonds?
Both track the same CPI, so their inflation protection is comparable. TIPS let you protect far more money since there’s no cap, but they carry the phantom-income tax and short-term price swings. I Bonds protect less but are simpler and more tax-friendly.
Where do I buy I Bonds and TIPS?
Buy I Bonds directly and commission-free at TreasuryDirect.gov. Buy TIPS either at TreasuryDirect or through any brokerage account, where they trade like other Treasury securities.
Should I hold TIPS in an IRA?
Yes, when possible. TIPS generate taxable phantom income each year from their principal adjustment. Holding them inside an IRA or 401k shelters that income, making the after-tax return meaningfully better than holding them in a taxable account.
The Bottom Line
The I Bonds vs TIPS decision isn’t either-or for most people — it’s a sequence. Max your I Bonds for simple, tax-friendly protection, then reach for TIPS inside a retirement account when you need to shield more. Either way, you’re doing the one thing too many savers skip: making sure inflation can’t quietly erode what you built.
Ready to build the full inflation-proof plan? The TTF Blueprint shows you exactly how much of your savings belongs in each tool.
Calculate the real cost to your savings: inflation impact calculator.