There is no universal winner: choose based on when you need the money, the after-tax return available for a comparable term, and the access, fees, and protection attached to each option. A high-yield savings account is built for accessible cash; a Treasury bill has a set maturity and a tax advantage for state and local income taxes; a CD offers terms governed by its contract.
How Treasury bills pay interest
Treasury bills are short-term U.S. government securities. They are generally sold at a discount: you pay less than the bill’s face value and receive face value at maturity. As TreasuryDirect puts it, “When the bill matures, you are paid its face value.” TreasuryDirect’s Treasury Bills page lists regular maturities of 4, 6, 8, 13, 17, 26, and 52 weeks, with a $100 minimum purchase.
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The return is the difference between the purchase price and face value. Bills do not make periodic interest payments; the return is realized at maturity. TreasuryDirect also offers reinvestment, so check the reinvestment instructions and timing if you want to continue investing after a bill matures.
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| Feature | Treasury bills | High-yield savings accounts | Certificates of deposit (CDs) |
|---|---|---|---|
| Term and rate | Regular maturities run from 4 weeks to 52 weeks; the bill’s return comes from its purchase price and face value. Current auction yields vary. | Access is designed for deposits, but the rate can change. Current APYs vary by institution and account. | The rate and term are set by the product contract. Current offers and terms vary. |
| Access to money | Payment is at maturity. TreasuryDirect says bills can be sold before maturity, but the amount realized on a sale is not guaranteed here. | Access is subject to the account’s terms and conditions. | Early withdrawal access and any penalty depend on the CD’s contract. |
| Taxes | Interest is subject to federal income tax and exempt from state and local income taxes. The discount generally is reported when the bill is paid at maturity. | Account interest is taxable interest; most interest credited is taxable in the year it is available to withdraw. | Account interest is taxable interest; most interest credited is taxable in the year it is available to withdraw. |
| Protection | U.S. government obligation; not FDIC-insured. | Eligible deposits at FDIC-insured banks are generally covered up to $250,000 per depositor, per insured bank, per ownership category. | Eligible deposits at FDIC-insured banks are generally covered up to $250,000 per depositor, per insured bank, per ownership category. |
| Minimums and costs | TreasuryDirect lists a $100 minimum purchase. Check any brokerage fees if buying through a broker. | Minimums and account fees depend on the bank and account. | Minimums, account fees, and early withdrawal penalties depend on the bank and CD. |
Sources: TreasuryDirect, Treasury Bills; TreasuryDirect, Treasury bill FAQs; IRS Publication 550; IRS, Tax Topic 403; Federal Deposit Insurance Corporation, deposit insurance.
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Which option fits your cash needs?
Choose a high-yield savings account for accessible cash
A savings account is generally the natural fit when you may need to withdraw money without waiting for a security to mature or accepting a CD’s early-withdrawal terms. Confirm the account’s access rules, fees, minimum balance requirements, current APY, and whether the bank is FDIC-insured.
Consider a Treasury bill when its maturity and tax treatment fit
A bill can suit money you can leave invested until its maturity, especially if state and local income-tax exemption improves your net return. If you might need the funds early, remember that selling is different from waiting for maturity: the sale proceeds are not established in advance. Treasury bills are not FDIC-insured.
Consider a CD when its contract matches your timeline
A CD can make sense when its term and contractual rate fit the date you expect to need the funds. Read the early withdrawal provisions before committing; the penalty and access conditions are institution- and product-specific.
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Compare after-tax returns on equal terms
Do not compare a Treasury bill’s quoted yield with a savings account APY or CD rate without aligning the dates, time horizons, fees, and tax treatment. The figures change, and a yield comparison is useful only when it reflects offers available for a similar period.
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- Choose the holding period. Start with the date you may need the cash, then compare a bill maturity with a savings account or CD period that is reasonably similar.
- Use date-stamped rates. Record the Treasury auction yield and bank APY or CD rate available on the same date. No live, same-date yield comparison is established here, so verify current offers before deciding.
- Account for taxes. Treasury bill interest is federally taxable but exempt from state and local income taxes. Savings and CD interest is taxable interest. Your tax bracket and locality determine the effect on your net return; consult a tax professional for individual tax advice.
- Subtract costs and consider access. Include any brokerage or bank fees and, for a CD, the possible early withdrawal penalty. A headline rate is not the whole comparison if the money may be needed early.
Check before moving short-term savings
- When might you need the money, and can it remain invested until the bill or CD matures?
- Are the rates current, date-stamped, and for comparable holding periods?
- What is the expected return after federal, state, and local taxes that apply to you?
- What fees, withdrawal conditions, or early withdrawal penalties apply?
- If using a savings account or CD, is the bank FDIC-insured, and will your total eligible deposits stay within applicable coverage limits?
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