Comparison Guide

I Bonds (Series I Savings Bonds) vs TIPS (Treasury Inflation-Protected Securities)

I Bonds vs TIPS compared side-by-side. Both protect against inflation, but they work very differently. See which is right for your portfolio in 2026.

Side-by-Side Comparison

I Bonds (Series I Savings Bonds)

Pros

+No risk of principal loss — guaranteed by the US Treasury, never goes down
+Inflation adjustment every 6 months based on CPI — tracks inflation precisely
+Tax-deferred — you don't owe taxes until you cash out (up to 30 years)
+State and local tax exempt — only pay federal taxes on the interest
+Can be used tax-free for education expenses (if you qualify)

Cons

-Purchase limit of $10,000 per person per year (plus $5K in paper bonds via tax refund)
-Must hold for at least 1 year — completely illiquid for 12 months
-Forfeit 3 months of interest if you redeem within 5 years
-Can only buy directly from TreasuryDirect.gov — not available through brokerages

Best For

Emergency fund supplement, conservative investors wanting inflation protection, and anyone looking for a safe place to park $10K/year with tax advantages.

TIPS (Treasury Inflation-Protected Securities)

Pros

+No purchase limit — invest as much as you want in inflation protection
+Tradeable on the secondary market — buy and sell through any brokerage
+Available as ETFs (TIP, SCHP) and mutual funds for easy diversification
+Principal adjusts with CPI — both coupon and face value increase with inflation
+Available in various maturities (5, 10, 30 years) for portfolio matching

Cons

-Mark-to-market risk — TIPS prices fall when real interest rates rise (2022 TIPS funds dropped 12%+)
-Phantom income problem — you're taxed on inflation adjustments you haven't received yet
-More complex to understand — real yield, break-even inflation rate, and accrued principal
-Deflation risk — while principal is floored at par at maturity, TIPS fund investors don't get that protection

Best For

Large portfolios wanting serious inflation protection, investors who need more than the $10K/year I Bond limit, and those who want tradeable inflation hedges.

Feature	I Bonds (Series I Savings Bonds)	TIPS (Treasury Inflation-Protected Securities)
Top Advantage	No risk of principal loss — guaranteed by the US Treasury, never goes down	No purchase limit — invest as much as you want in inflation protection
Biggest Drawback	Purchase limit of $10,000 per person per year (plus $5K in paper bonds via tax refund)	Mark-to-market risk — TIPS prices fall when real interest rates rise (2022 TIPS funds dropped 12%+)
Best For	Emergency fund supplement, conservative investors wanting inflation protection, and anyone looking for a safe place to park $10K/year with tax advantages.	Large portfolios wanting serious inflation protection, investors who need more than the $10K/year I Bond limit, and those who want tradeable inflation hedges.

Glen's Verdict

Former hedge fund manager, current index fund enthusiast

Buy your $10K in I Bonds first every year. They're strictly better for the first $10K — no market risk, tax deferral, state tax exemption, and a guaranteed floor. After that, TIPS are your option for additional inflation protection. But be careful with TIPS funds vs individual TIPS: if you buy individual TIPS and hold to maturity, you get your inflation-adjusted principal back. If you buy a TIPS fund, you're subject to interest rate risk just like any bond fund — as 2022 painfully demonstrated. For most people, max I Bonds + a total bond fund is simpler and more effective than trying to optimize TIPS allocations.

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Frequently Asked Questions

Which is better, I Bonds (Series I Savings Bonds) or TIPS (Treasury Inflation-Protected Securities)?

It depends on your situation. I Bonds (Series I Savings Bonds) is best for: Emergency fund supplement, conservative investors wanting inflation protection, and anyone looking for a safe place to park $10K/year with tax advantages. TIPS (Treasury Inflation-Protected Securities) is best for: Large portfolios wanting serious inflation protection, investors who need more than the $10K/year I Bond limit, and those who want tradeable inflation hedges.

What are the main differences between I Bonds (Series I Savings Bonds) and TIPS (Treasury Inflation-Protected Securities)?

The key differences come down to their strengths. I Bonds (Series I Savings Bonds) advantages include no risk of principal loss — guaranteed by the us treasury, never goes down and inflation adjustment every 6 months based on cpi — tracks inflation precisely. TIPS (Treasury Inflation-Protected Securities) advantages include no purchase limit — invest as much as you want in inflation protection and tradeable on the secondary market — buy and sell through any brokerage.

Can I have both I Bonds (Series I Savings Bonds) and TIPS (Treasury Inflation-Protected Securities)?

In many cases, yes. Having both can provide diversification and flexibility. Evaluate your specific needs, goals, and eligibility requirements to determine if using both makes sense for your situation.

What are the downsides of I Bonds (Series I Savings Bonds)?

Purchase limit of $10,000 per person per year (plus $5K in paper bonds via tax refund) Must hold for at least 1 year — completely illiquid for 12 months Forfeit 3 months of interest if you redeem within 5 years Can only buy directly from TreasuryDirect.gov — not available through brokerages

What are the downsides of TIPS (Treasury Inflation-Protected Securities)?

Mark-to-market risk — TIPS prices fall when real interest rates rise (2022 TIPS funds dropped 12%+) Phantom income problem — you're taxed on inflation adjustments you haven't received yet More complex to understand — real yield, break-even inflation rate, and accrued principal Deflation risk — while principal is floored at par at maturity, TIPS fund investors don't get that protection

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