Treasury bills vs. CDs: Which is better in 2026
If you have cash you won’t need for a few months, you might be wondering whether it belongs in a certificate of deposit (CD) or a Treasury bill (T-bill). Both can help you earn a return while taking relatively little risk if held to maturity, but figuring out which option is better is about more than comparing advertised rates.
In this guide, we’ll break down how Treasury bills and CDs compare, including their returns, taxes, safety, liquidity, and convenience. By the end, you’ll have a better idea of which option is best for your timeline and savings goals.
Treasury bills vs. CDs at a glance
Treasury bills and CDs are popular options for people who want to earn a return on cash without investing in the stock market. That said, they’re very different products.
A CD is a deposit account offered by a bank or credit union. You agree to leave your money in the account for a set period of time in exchange for a fixed interest rate.
Meanwhile, a Treasury bill is a short-term security issued by the U.S. government. Instead of earning interest in the traditional sense, T-bills are typically sold at a discount to their face value and pay their full face value when they mature.
The table below breaks down how certificates of deposit work and how they differ from Treasury bills.
| Feature | Treasury bills | CDs |
|---|---|---|
| Issuer | U.S. Department of the Treasury | Banks and credit unions |
| Product type | Short-term U.S. government security | Deposit account |
| Common terms | 4, 6, 8, 13, 17, 26, and 52 weeks | A few months to several years |
| How returns are quoted | Yield | Annual percentage yield (APY) |
| How you earn money | Bought at a discount and redeemed at full face value when it matures | Earns interest over the term, with principal and interest paid at maturity (or periodically, depending on the CD) |
| Early access | Can be sold before maturity on the secondary market, although its value may be more or less than what you paid | Usually requires paying an early withdrawal penalty |
| Taxes | Subject to federal income tax but exempt from state and local income taxes | Interest is generally subject to federal, state and local income taxes |
| Protection | Backed by the full faith and credit of the U.S. government | Eligible deposits are insured by the FDIC or NCUA, subject to applicable coverage limits |
| Minimum investment | Generally starts at $100 when purchased through TreasuryDirect.gov | Varies by financial institution. Some CDs have no minimum deposit, while others require hundreds or thousands of dollars. |
| Where to buy | TreasuryDirect or a brokerage account | Banks, credit unions and many brokerage firms |
| What happens at maturity | Face value is paid to you | You receive your principal plus earned interest. Some CDs automatically renew unless you take action during the grace period. |
CDs and T-bills are better for different needs
There’s no one-size-fits-all answer when it comes to choosing between a CD and a T-bill. The better option depends on how long you can leave your money alone, how much convenience matters to you, and what you’ll actually earn after taxes.
A CD may be a better fit if you prefer the simplicity of opening an account with a bank or credit union, want to know exactly how much you’ll receive at maturity, and can leave your money untouched until your term ends. CDs at federally insured institutions may be covered by the Federal Deposit Insurance Corp. (FDIC) insurance or the National Credit Union Administration (NCUA) insurance, subject to applicable coverage limits.
A Treasury bill may make more sense if you’re looking for a short-term place to park your cash, want the backing of direct U.S. government obligations, or live in a state with income taxes and want to avoid paying state and local income tax on the interest you earn.
The most important thing is to compare options with similar maturity dates instead of focusing only on the advertised rate. You’ll also want to consider your after-tax return and whether there’s a chance you’ll need your money before the investment matures.
Bottom line: Before choosing between a CD and a Treasury bill, compare (1) the length of the term, (2) what you’ll keep after taxes, and (3) how easily you can access your money if your plans change.
Compare today’s returns on an equal and after-tax basis
It’s tempting to look at a CD’s APY and a Treasury bill’s quoted yield and assume the higher number is the better deal. That strategy can be misleading. To make a fair comparison, you’ll want to look at products with similar maturity dates and consider how each investment calculates returns and how those earnings are taxed.
Match the maturity before comparing the rate
Start by comparing products with roughly the same term. For example, compare a 6-month CD with a Treasury bill that matures in about 6 months. Looking at investments with similar timelines gives you a more accurate picture of what you could earn over the same period.
It’s also important to understand that Treasury bill yields and CD APYs aren’t quoted the same way. When comparing a T-bill with a CD, use the Treasury bill’s investment yield or equivalent coupon-issue yield instead of its bank discount rate. Those figures are designed to provide a closer apples-to-apples comparison with the APY used for CDs.
To estimate your CD earnings, remember that APY reflects the effect of compounding when interest remains on deposit, so make sure you’re comparing similar assumptions before deciding which option offers the better return.
Calculate the estimated after-tax return
Once you’ve matched the term, compare how much money you could actually keep after taxes. Using the same starting deposit and holding period for each option can make the comparison much easier.
Interest earned from a CD is generally subject to federal, state, and local income taxes. Interest earned from Treasury bills is subject to federal income tax but is generally exempt from state and local income taxes. Because of that difference, a Treasury bill may leave you with more money after taxes if you live in a state that taxes income.
Also keep in mind that tax savings vary based on where you live and your personal tax situation. If you’re unsure how taxes could affect your return, consider speaking with a qualified tax professional.
When a CD may be the better fit
A CD may be the better choice if you value simplicity, predictable returns, and the convenience of keeping your money with a bank or credit union. While Treasury bills can offer advantages in some situations, a CD’s structure may be a better match for savers who want a straightforward option with clearly defined terms.
A CD may work better if:
- You find a competitive CD APY for a term that matches your savings timeline.
- You prefer managing your money through an existing bank or credit union account.
- You want a clear APY, maturity date, and set expectations for how much you’ll receive when the CD matures.
- Your deposit stays within applicable FDIC or NCUA insurance limits.
- You want the option of a no-penalty CD because you may need access to your money early, but you’ve compared the rate and withdrawal rules carefully.
- You understand the CD’s early withdrawal penalty, automatic renewal policy, and any required actions before the grace period ends.
When a Treasury bill may be the better fit
A Treasury bill may be a better option if you’re focused on short-term flexibility, potential tax advantages, or investing directly in a U.S. government security. The right choice depends on your goals, your tax situation, and how comfortable you are with buying and holding Treasury securities.
A T-bill may fit you if:
- A Treasury bill with a similar maturity offers a stronger estimated after-tax return than available CDs you’re considering.
- You want one of the short-term maturity options available through Treasury bills.
- You live in a state with income taxes, and the exemption from state and local taxes makes a meaningful difference in your return.
- You’re comfortable purchasing Treasury bills through TreasuryDirect or a brokerage account.
- You expect to hold the Treasury bill until maturity instead of selling it early.
- You understand that selling a Treasury bill before maturity is different from withdrawing money from a bank account and may involve brokerage steps or changes in the market value of the security.
Five questions before you commit your cash
As you decide when to lock in a rate, taking a few minutes to compare key details can help you make a better choice. Consider how easy it will be to access your money, what happens if your plans change, and how taxes will affect your return.
Ask yourself these five questions:
- When will you need the money? Make sure the term matches your timeline. If there’s a chance you’ll need the money sooner, consider how each option handles early access.
- Are the maturity dates reasonably similar? A 3-month CD and a 1-year Treasury bill don’t give you access to your money on the same timeline, so comparing their rates can be misleading. Compare options with similar maturity dates to get a more accurate picture of which one offers a better return.
- What is the estimated after-tax return? The advertised rate isn’t always the amount you’ll keep. Consider how federal, state, and local taxes may affect your final return.
- What happens if you need the money early? CDs may charge an early withdrawal penalty, while selling a Treasury bill before maturity may involve a brokerage account and could result in a different sale price.
- Do you understand the terms, protections, and purchase process? Before committing your cash, confirm the account or security details, including insurance coverage for CDs, Treasury bill purchase steps, and any fees or restrictions that apply.
If a CD looks like the better fit for your savings goals, compare current CD rates and terms to find an option that matches your timeline and return expectations.
Frequently asked questions
Treasury bills and CDs have different types of protection. Treasury bills are backed by the full faith and credit of the U.S. government, while CDs from federally insured banks or credit unions are protected by FDIC or NCUA insurance within applicable limits.
It depends on current rates, the term you choose, and your tax situation. The best option is the one that offers the strongest after-tax return for a comparable maturity.
Yes, interest earned from Treasury bills is generally exempt from state and local income taxes, although it is still subject to federal income tax.
Treasury bills can generally be sold before maturity through a brokerage account or transferred to another financial institution. However, the amount you receive may be more or less than the amount you would receive at maturity, depending on the current market conditions.
