US 2028 I-Bond vs TIPS

I-Bond 2028: $10k/yr cap + 30-yr max + composite rate (fixed + inflation). TIPS: market-traded + accrue principal + tax annual. Different use cases.

I-Bond fixed rate %

Expected inflation %

5-yr TIPS yield %

Marginal bracket %

I-Bond

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TIPS Nominal

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I-Bond composite	—
I-Bond real	—
TIPS nominal	—
TIPS real	—

I-Bonds vs TIPS 2028: I-Bonds capped at $10k/year purchase ($25k+ with tax refund I-Bonds), 30-year maximum hold, defers federal tax until redeem. TIPS market-traded, no cap, but principal accruals taxed annually (phantom income trap). Different use cases: I-Bonds for emergency fund + tax-deferred. TIPS for IRA/401(k) protection from inflation.

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Last updated May 2026. Sources: IRS Treasury.