Neither a certificate of deposit (CD) nor a Treasury bill is always better for short-term savings. Compare the current yield over the same time period, after-tax return, maturity date and cost of accessing the money early. A Treasury bill may suit a saver whose cash date lines up with its maturity and who benefits from its state and local tax exemption; a CD may suit someone seeking an eligible bank deposit with FDIC coverage and a competitive rate.
CD vs. Treasury bill: the main differences
| Feature | Treasury bill | CD |
|---|---|---|
| What it is | A short-term U.S. Treasury security. | A bank deposit kept for a stated term. |
| Typical term or maturity | Regular terms run from 4 to 52 weeks; available terms are 4, 6, 8, 13, 17, 26 and 52 weeks. TreasuryDirect | FDIC says bank CDs commonly run from three months to five years or longer. Exact terms vary by institution. FDIC |
| How return is paid | Usually bought below face value and redeemed at face value at maturity; the difference is interest. | Interest is paid according to the CD’s agreement, which specifies the APY and compounding terms. |
| Taxes on interest | Subject to federal income tax; exempt from state and local income taxes. | CD interest is generally subject to federal and applicable state and local income taxes. |
| Protection | Not an FDIC-insured bank deposit. | Eligible deposits at an insured bank are covered within FDIC limits, subject to ownership category and aggregation rules. |
| Getting money before maturity | Can be sold, but the market price may be higher or lower than the purchase price. | Early access and any penalty are governed by the specific CD contract. |
The table describes general mechanics, not a guarantee of a particular return or access term. Check the current offer and product disclosures before buying.
How to decide which one fits your savings goal
Start with the date you need the money
Choose a maturity that lines up with the planned expense or cash need. Treasury bills have fixed auction maturities; CDs have the term stated by the bank. If the date is uncertain, consider how the product handles early access rather than assuming either option can be cashed out without cost.
Compare after-tax returns, not just the headline rate
Compare a CD’s current APY with the Treasury bill’s current auction investment yield for a similar maturity. Then account for taxes. Treasury bill interest is federally taxable but exempt from state and local income taxes, so the value of that exemption depends on your state and tax circumstances. The IRS says the difference between a discounted bill’s purchase price and its face value is generally reported as interest income when paid at maturity. IRS Publication 550
Do not compare a bill’s discount rate with a CD APY as if the figures were interchangeable. Treasury explains its bill pricing conventions on its bill information page. Use the investment yield and confirm that both rates cover a comparable period.
Weigh access against certainty
If you hold a bill to maturity, its redemption value is face value. TreasuryDirect also says bills can be sold before maturity, but that does not guarantee the sale price: market prices change, and you could receive less than you paid. A CD’s early-withdrawal rules come from its account agreement; some CDs may have other conditions, including call provisions. Review the terms before committing money you might need early.
Consider the kind of protection you want
A CD is a bank deposit, and eligible deposits at an FDIC-insured bank are insured up to the applicable limit. The FDIC’s standard maximum is $250,000 per depositor, per insured bank, per ownership category, including principal and accrued interest. Count other deposits you hold at that bank in the same ownership category when assessing coverage. A Treasury bill is a security, not an FDIC-insured deposit; these are different forms of protection, not a basis for calling one option categorically safer.
How Treasury bills work
TreasuryDirect lists regular bill maturities of 4, 6, 8, 13, 17, 26 and 52 weeks. Bills are electronic, sold at a discount or at par, and redeemed at face value at maturity. The minimum purchase is $100, in $100 increments. Treasury auctions most listed terms weekly; 52-week bills are auctioned every four weeks. The rate is fixed at auction, and the return is the difference between the purchase price and face value. TreasuryDirect
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You can buy bills through TreasuryDirect or through a bank or broker. TreasuryDirect states, “You can hold a bill until it matures or sell it before it matures.” If you sell before maturity, the market price may differ from what you paid. TreasuryDirect purchase information
What to check before choosing a CD
A CD keeps money deposited for a stated term, but its rate, payment schedule and restrictions are specific to the institution and account. Read the account agreement for:
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- APY and how interest compounds or is paid.
- Early-withdrawal rules and any penalty.
- Whether the CD has a call feature that could let the bank close it early.
- What happens at maturity, including renewal instructions and any grace period.
- Whether the deposit is eligible for FDIC coverage and how it combines with your other deposits at the bank.
FDIC guidance notes that some market-linked and longer-term high-yield CDs may include a call feature. Do not assume that a CD’s advertised term guarantees the money will remain deposited for that entire period. FDIC
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare today’s rates
Rates change, so a dated average is context rather than a live offer or forecast. As of April 20, 2026, the FDIC national-rate table reported averages of 1.25% for 3-month CDs, 1.44% for 6-month CDs and 1.53% for 12-month CDs. These are national averages from reported deposit-rate data, not the best available offers and not October 2026 quotes. FDIC national rates
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteFor a current decision, look up the CD APY and Treasury bill auction investment yield available when you are ready to buy, and compare similar maturities. No October 2026 bill auction yield is stated here, so these figures do not establish which product currently pays more.
A practical decision rule
- Consider a Treasury bill if a listed maturity matches your savings date and its after-tax return is competitive for your circumstances.
- Consider a CD if you find a competitive APY for the needed term, want an eligible bank deposit with FDIC coverage, and accept the account’s access and renewal terms.
- If you may need the money early, compare the CD’s contractual withdrawal consequences with the possible market-price change from selling a bill.
The better choice is the one whose maturity, after-tax return, protection and access rules fit the job your savings must do.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
