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There is no risk-free way to guarantee that savings will keep pace with inflation. A stable bank balance can lose purchasing power if its after-tax interest rate is too low; inflation-linked bonds address that risk differently, but bring access limits or market-price risk. Keep money you may need soon liquid, then compare Series I savings bonds and Treasury Inflation-Protected Securities (TIPS) for money you can leave invested.
Start by separating the risks
“Safe” can mean several things: unlikely to lose principal, likely to preserve purchasing power, readily available when needed, or unlikely to fall in market value if sold early. Those are not the same. Inflation can erode the buying power of fixed-rate interest, while a marketable bond can lose value before maturity when interest rates or liquidity conditions change. No single option eliminates every risk or guarantees a return above your personal cost of living. Investor.gov explains these risks for bonds.
Keep near-term and emergency money accessible
Do not commit money to a product whose access rules conflict with when you might need it. Eligible insured bank deposits are commonly used for accessible cash, but account rates and terms vary. Deposit insurance depends on the institution, account type, ownership category, and balances; confirm current coverage directly with the FDIC rather than assuming every balance or account qualifies. Compare the account’s after-tax yield with inflation, not just its nominal rate. A rising account balance does not necessarily mean rising purchasing power.
Compare the main choices
| Option | Inflation relationship | Access | Principal and price risk | Useful comparison |
|---|---|---|---|---|
| Eligible insured bank deposits | Rate is set by account terms and may change. | Generally intended for accessible cash; account terms vary. | Coverage applies only when institution, account type, ownership category, and balances qualify. | Compare after-tax yield and access terms with current inflation. |
| Series I savings bonds | Rate combines a fixed component with a CPI-U-based inflation component that resets every six months; the composite rate cannot fall below zero. | Not marketable. Cannot be redeemed for 12 months; redemption before five years forfeits the last three months of interest. | Backed by the full faith and credit of the U.S. government; the rate can change. | $10,000 annual electronic purchase limit per SSN or EIN. |
| TIPS | Principal adjusts with CPI-U, and coupon interest is calculated on adjusted principal. | Marketable; available at auction or through banks, brokers, and dealers, and may be sold before maturity. | Market price can rise or fall before maturity, so an early sale can result in a loss. | 5-, 10-, and 30-year maturities; compare term, market yield, tax effects, and likely holding period. |
Series I bonds: inflation-linked, with a lockup
An I bond’s composite rate combines a fixed rate, which remains with that bond, and a variable rate based on CPI-U inflation. The inflation component resets every six months, so the rate on a bond can change; the composite rate has a zero floor. TreasuryDirect lists a 4.26% composite rate, including a 0.90% fixed rate, for I bonds issued May 1 through October 31, 2026. That is the rate for that issue window, not a guaranteed long-term return or the rate for every existing bond. TreasuryDirect’s I bonds page gives current terms and rate details.
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- You cannot cash an I bond during its first 12 months.
- If you redeem before holding it for five years, you lose the last three months of interest.
- The annual electronic purchase limit is $10,000 per Social Security Number or Employer Identification Number.
- I bonds are not marketable securities: you redeem them under Treasury rules rather than selling them on a bond market.
TreasuryDirect says I-bond interest can generally be reported for federal tax when the bond is redeemed, and that interest is exempt from state and local income tax. Tax treatment can depend on your circumstances, so check current IRS guidance or consult a tax professional.
TIPS: inflation adjustment with a market price
TIPS principal is adjusted for CPI-U. Coupon payments are calculated against the adjusted principal, so their dollar amount can change as principal changes. TreasuryDirect lists 5-, 10-, and 30-year maturities. TIPS are marketable and can be bought at auction or through banks, brokers, and dealers; they can also be sold before maturity. TreasuryDirect’s comparison of TIPS and I bonds describes these mechanics.
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Marketability is useful if your plans change, but it is not a promise that you can sell at the amount you paid. A TIPS sale price can be affected by interest rates and liquidity, and an early sale may return less than the purchase price. If you need certainty about when funds will be available, weigh the maturity and possible sale-price changes against your time horizon. Investor.gov’s bond risk overview explains interest-rate and liquidity risks.
TIPS interest and inflation adjustments that increase principal are generally federally taxable in the year they occur, even if the adjustment has not been received as cash; they are exempt from state and local income tax, according to TreasuryDirect. Consider the timing of that tax alongside your holding period and account type, and verify current IRS guidance for your own situation.
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Choose by when you may need the money
- Set aside cash for near-term needs. Use accessible accounts with terms and qualifying insurance coverage you have verified. Avoid relying on an instrument that cannot be redeemed when you need the funds.
- For money you can leave invested, decide whether a redemption restriction or market price is the bigger concern. I bonds have a 12-month minimum holding period and an early-redemption interest penalty; TIPS can be sold earlier, but their market value may be below your purchase price.
- Match the bond to the likely holding period. Consider TIPS maturity, current market yield, tax timing, and whether you can hold to maturity; for I bonds, account for the five-year penalty period and changing rate.
- Review the decision when your needs or product terms change. Rates and inflation-linked components change over time. The official product rules explain mechanics, not a suitable allocation for your household.
These are U.S. products and rules. TreasuryDirect says savings bonds are backed by the full faith and credit of the U.S. government; that backing does not remove I-bond access restrictions or TIPS market-price risk. TreasuryDirect’s savings bonds overview describes the general terms.
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