Treasury Bill

What Is a Treasury Bill?

A Treasury bill is a short-term U.S. government debt security sold at a discount and maturing in one year or less. Unlike a coupon-paying Treasury note or Treasury bond, a Treasury bill does not make periodic interest payments. Instead, the investor buys the bill for less than face value and receives the full face value at maturity. In fixed income, Treasury bills matter because they are one of the main anchors for cash management, short-term government borrowing, and the front end of the yield curve.

Key Takeaways

• Treasury bills are short-term Treasury securities with maturities of one year or less.
• They are usually sold at a discount rather than paying semiannual coupons.
• The investor's return comes from the gap between purchase price and face value at maturity.
• New Treasury bills are issued through the Treasury auction process.
• Treasury bills usually carry much less interest-rate sensitivity than longer-term Treasury notes and Treasury bonds.

How Treasury Bills Work

When an investor buys a Treasury bill, the investor is lending money to the U.S. government for a relatively short period. If the bill is held to maturity, the government repays the full face value. Because the bill is bought below face value, that difference becomes the investor's return. There is no stream of coupon income in between.

This makes Treasury bills look different from most longer-term bonds. A note or bond investor often thinks about coupon payments, current yield, and price sensitivity over time. A Treasury-bill investor is usually focused more on short-term yield, principal return, and where the bill fits in a cash-management or near-term-liquidity plan.

Why Treasury Bills Matter

Treasury bills matter because they are one of the cleanest low-credit-risk short-term instruments in the market. They help investors park cash, manage liquidity, and compare other short-term yields against a U.S. government benchmark. Their yields also matter beyond direct ownership. They influence how the market thinks about money-market rates, financing conditions, and the shape of the front end of the Treasury curve.

That benchmark role is one reason Treasury bills show up in discussions that are much broader than a single security purchase. They can shape how investors judge short-dated corporate debt, cash alternatives, and the opportunity cost of holding idle balances.

Treasury Bill Versus Treasury Note

A Treasury note generally matures in two to 10 years and pays fixed interest every six months. A Treasury bill matures in one year or less and is usually sold at a discount instead of paying coupons. The note is more exposed to medium-term rate moves, while the bill is usually used more as a short-term funding or cash-management instrument.

How Treasury Bills Are Issued

New Treasury bills are sold through regularly scheduled Treasury auctions. Investors can buy them at auction or later in the secondary market. Once issued, the most recently issued bill in a maturity bucket may also become an on-the-run Treasury benchmark for that part of the market.

Example Discount-to-Maturity Return

Suppose an investor buys a Treasury bill for less than its face value and holds it to maturity. When the bill matures, the investor receives the full face amount. The difference between the discounted purchase price and the amount received at maturity is the investor's return.

The Bottom Line

A Treasury bill is a short-term U.S. government debt security sold at a discount and maturing in one year or less. It matters because it is one of the core benchmark instruments for cash management, short-term government borrowing, and the front end of the Treasury market.