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Neither Treasury bills nor certificates of deposit (CDs) are always better for short-term savings. Match the maturity to the date you need the money, then compare current same-term returns after taxes and account for how you could access the funds early. Treasury bills offer a known maturity payment if held to maturity; CD access, penalties, renewal, and any call features depend on the specific account.
This comparison covers U.S. Treasury bills and bank CDs. Rates and offers change, and the sources available do not establish a same-day comparison of Treasury auction yields and CD offers for October 7, 2026.
How Treasury bills work
Treasury bills are short-term U.S. government securities. TreasuryDirect lists regular terms of 4, 6, 8, 13, 17, 26, and 52 weeks. Bills are sold at a discount or at face value, and the Treasury pays face value at maturity. The difference between the purchase price and face value is the bill’s interest. The rate is set at auction, and interest is paid at maturity. The listed minimum purchase is $100, in $100 increments. See TreasuryDirect’s Treasury bill overview.
You can buy bills through TreasuryDirect using a noncompetitive auction bid, through a bank, broker, or dealer, or in the secondary market. With a TreasuryDirect purchase, the auction determines the rate, so you do not know it when scheduling the purchase. Details are in TreasuryDirect’s buying guide.
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If you need cash before maturity, you may sell a bill in the market. Its sale price can differ from the maturity value, so early sale does not guarantee you will receive face value. If you hold it to maturity, TreasuryDirect provides for redemption; it also allows holders to schedule reinvestment in a bill of the same term. See TreasuryDirect’s bill redemption and reinvestment guidance.
How CDs work
A bank CD is a deposit held for a stated term in exchange for interest under the account’s terms. The FDIC says CD terms are usually three months to five years or more. Early withdrawal rules vary: many fixed-rate CDs permit early redemption for a fee, but the penalty is set by the institution and contract. Some market-linked CDs may not allow early redemption, and some long-term, high-yield CDs may include a bank call option. Read the FDIC’s CD shopping guidance and the specific account agreement.
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Before opening a CD, check its minimum deposit, early-withdrawal penalty, maturity instructions, and whether it renews automatically. If it renews, find out what rate and term apply and how long you have to withdraw or change the instructions. Also verify that the product is an insured deposit rather than an investment that is not covered by deposit insurance.
Compare the trade-offs
| Question | Treasury bill | CD |
|---|---|---|
| Return and maturity | The auction sets the rate. If held to maturity, the Treasury pays face value. | Interest, term, and maturity terms are set by the institution and account contract. |
| Access before maturity | May be sold in the market; proceeds depend on the sale price. | May allow early withdrawal for a penalty; some products do not permit early redemption. |
| Tax treatment | Interest is federally taxable and exempt from state and local income taxes. | Interest is taxable interest; state and local treatment depends on applicable tax rules. |
| Protection | Direct debt obligation of the U.S. government. | May be covered by FDIC insurance when held at an FDIC-insured bank, subject to applicable rules and limits. |
| Renewal or reinvestment | TreasuryDirect lets holders schedule reinvestment in a bill of the same term or redeem at maturity. | Automatic renewal and maturity choices depend on the institution and account terms. |
| Minimum | TreasuryDirect lists a $100 minimum, in $100 increments. | Not stated as a general amount; check the specific CD offer. |
How taxes affect the comparison
Treasury bill interest is subject to federal income tax but exempt from state and local income taxes, according to TreasuryDirect. The IRS classifies interest from bank accounts and CDs as taxable interest; see IRS Topic No. 403. Both are federally taxable, but the Treasury bill’s state and local exemption can affect the after-tax result for someone who pays those taxes. The better choice depends on the saver’s tax situation as well as the products’ returns.
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How to compare current offers
- Set the cash date. Decide when the money must be available, then look for a bill or CD whose maturity fits that date. Avoid choosing a longer term solely for a higher advertised return if it conflicts with the plan.
- Compare like with like. Check a current Treasury bill auction result against a CD’s current APY for an approximately equal term. Compare annualized, pre-tax returns on a consistent basis; a bill’s quoted discount rate and a CD APY are not interchangeable measures.
- Estimate the after-tax return. Account for federal tax on both products and the Treasury bill’s exemption from state and local income taxes. Your tax circumstances determine how much that difference matters.
- Read the CD’s terms. Confirm the minimum, early-withdrawal penalty, renewal window, maturity instructions, and any call or market-linked feature before depositing.
- Choose how to handle a bill. Decide whether you will hold it to maturity or might need to sell early. If sold before maturity, the market price determines the proceeds.
- Check deposit coverage for a CD. Confirm the bank’s FDIC status and whether your planned balance, ownership category, and other deposits fit within applicable insurance coverage. The FDIC’s deposit insurance FAQs explain the coverage rules.
Which one may fit your situation?
A Treasury bill may fit when
- You can match a listed bill term to the date you need the money and expect to hold it to maturity.
- State and local tax exemption is relevant to your after-tax comparison.
- You prefer a direct U.S. government obligation and understand that an early sale may return more or less than face value.
A CD may fit when
- A specific CD’s term and current APY suit your timeline and compare favorably after taxes.
- You are comfortable with its early-withdrawal terms, or do not expect to need the money before maturity.
- You have confirmed the account’s renewal rules and, when relevant, that the deposit is within applicable FDIC insurance coverage.
If you cannot accept either a CD withdrawal penalty or the possibility of a Treasury bill’s market price affecting early-sale proceeds, money that must stay immediately available may call for a different type of savings product.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A dated rate reference, not a current offer
The FDIC’s national rate table published March 16, 2026, reported national average CD deposit rates of 1.28% for three-month CDs, 1.47% for six-month CDs, and 1.52% for 12-month CDs. These are dated national averages, not current consumer offers or a direct comparison with a particular Treasury bill auction. See the FDIC’s national rates and rate caps.
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