Simple definition
A Treasury bill, or T-bill, is a short-term loan you make to the U.S. government that matures in one year or less. Instead of paying interest along the way, it's sold for less than its face value, and you collect the full face value at maturity. Think of it like a gift card you buy for $95 that's worth $100 later — the gap is your return.
Why it matters
T-bills are among the safest places to park money you'll need soon, since they're backed by the U.S. government and mature quickly. They give short-term savings a small return without the price swings of stocks. Even so, their low yields can trail inflation over time.
Real-life example
Say you buy a T-bill with a $1,000 face value for $980. A few months later it matures and the government pays you the full $1,000. Your $20 gain is the return for lending your money. These numbers are rounded and made up to show the idea, not a current rate.
Common mistakes
- Assuming a T-bill pays regular interest checks, when the return comes from buying below face value.
- Locking money into a bill you might need before it matures and being forced to sell early.
- Treating the tiny yield as a way to grow wealth rather than protect short-term cash.
- Forgetting that even a very safe return can lose ground to inflation over time.
Pro tips
- Use T-bills for money you'll need within a year, not for long-term growth.
- Match the bill's maturity to when you'll actually need the cash.
- Buy directly through TreasuryDirect or a broker to skip extra fees.
- Compare the bill's return to a high-yield savings account before deciding.
Related Money Dictionary terms
- Treasury BondA long-term loan to the U.S. government that pays fixed interest and is considered very low risk.
- Treasury NoteA U.S. government loan that matures in two to ten years and pays interest every six months.
- Money Market FundA low-risk fund that invests in short-term, high-quality debt and aims to keep a stable share price.
- YieldThe income an investment pays you each year, shown as a percentage of its current price.
- Cash EquivalentA safe, short-term investment that can be converted to cash quickly, such as a money market fund or Treasury bill.
- Government BondA loan to a national government, generally seen as low risk because it is backed by the government's ability to tax.
Frequently asked questions
How is a Treasury bill different from a Treasury note or bond?
The main difference is time. Treasury bills mature in one year or less and pay no periodic interest — you buy them at a discount. Treasury notes mature in two to ten years and bonds run longer, and both pay interest every six months. All three are backed by the U.S. government.
Are Treasury bills really risk-free?
They're considered among the safest investments because the U.S. government backs them, so the risk of not being repaid is extremely low. But no investment is truly free of all risk. With T-bills, the main downside is that their low return can fail to keep pace with inflation, quietly shrinking your buying power.
How do I actually buy a Treasury bill?
You can buy T-bills directly from the government through TreasuryDirect.gov, usually with no fee, or through a brokerage account. Many money market funds also hold T-bills on your behalf. Buying direct avoids middleman costs, while a broker or fund can be simpler if you already have an account there.
Knowing what Treasury Bill means is knowledge — the first half. A brick gets placed when you act on it: check the current return on a short-term Treasury bill and compare it to your savings account rate.
Also builds: Investing
Sources & references
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Plain-English education — not personalized legal, tax, or investment advice.