How to Invest in Treasury Bills Through a Brokerage Account

How to Invest in Treasury Bills Through a Brokerage Account in 2026: Setup, Yields, and Tax Basics

Treasury bills can provide a relatively simple place to hold short-term cash while earning a market-based yield. They are backed by the U.S. government, mature in one year or less, and can usually be purchased through the same brokerage account used for stocks, exchange-traded funds, and mutual funds.

Learning how to invest in Treasury bills through a brokerage account requires understanding a few details that do not apply to ordinary stock trades. You must select a maturity, interpret the quoted price and yield, confirm that sufficient settled cash is available, and decide whether to buy at a Treasury auction or in the secondary market.

This guide explains the process, including a worked return example, tax basics, and a practical checklist. Treasury yields change continually, so use the live quotes displayed by your broker rather than relying on an older published rate.

How to Invest in Treasury Bills Through a Brokerage Account

Treasury bills, commonly called T-bills, are short-term debt securities issued by the U.S. Department of the Treasury. Regularly offered maturities generally range from 4 to 52 weeks, although the available terms and auction calendar can change.

Unlike conventional bonds, T-bills do not make semiannual coupon payments. They are normally issued or traded at a discount to their face value. The investor pays less than the amount due at maturity and receives the full face value when the bill matures.

For example, an investor might pay $9,800 for a bill with a $10,000 face value. If the bill is held to maturity, the investor receives $10,000. The $200 difference is the investment income before federal taxes and any trading costs.

Who T-bills may be appropriate for

T-bills may be useful for investors who want to:

Hold money for a planned expense within the next year.
Earn interest on cash that is not needed immediately.
Create a schedule of predictable maturity dates.
Reduce exposure to state and local income taxes on interest.
Add short-term U.S. government securities to a diversified portfolio.

A T-bill is not a substitute for every emergency fund. Brokerage transactions have settlement requirements, and money invested in a bill may not be instantly available. Keep immediately needed cash in an appropriately liquid account.

Brokerage account versus TreasuryDirect

Feature	Brokerage Account	TreasuryDirect
New-issue auctions	Available at many brokers	Available directly from the Treasury
Secondary-market trading	Usually available	Not available inside TreasuryDirect
Early sale	Can generally be sold through the broker, subject to market conditions	Must first be transferred to a bank, broker, or dealer
Portfolio tracking	T-bills appear alongside other investments	Holdings remain in a separate government account
Pricing	Broker spreads, markups, or fees may apply	Auction purchases do not involve a brokerage markup

The main brokerage advantage is convenience. Investors can track their cash, T-bills, stocks, and funds in one account. A broker also provides access to the secondary market if the bill must be sold before maturity.

TreasuryDirect can be useful for buying and holding new issues directly. However, securities generally must be held there for at least 45 calendar days before they can be transferred, and an early sale requires a transfer to an outside financial institution. Investors should verify the current transfer rules before relying on TreasuryDirect for near-term liquidity.

What to Check Before Opening or Using a Brokerage Account

Not every brokerage offers identical Treasury services. Before funding an account, confirm that it supports both the securities and order types you expect to use.

Access to Treasury trading

Look for a fixed-income, bonds, government securities, or Treasury section. Confirm whether the broker offers:

New-issue Treasury auctions.
Secondary-market Treasury bills.
Online order entry rather than phone-assisted trading only.
Automatic reinvestment, if that feature is important to you.

Minimums, increments, and costs

Treasury marketable securities are issued in $100 increments through TreasuryDirect, but a brokerage may impose different order minimums. Secondary-market listings commonly specify a minimum face value and additional quantity increments. Do not assume that every listing can be purchased with only $100.

Many brokers advertise commission-free online trades for new-issue Treasuries, but that does not mean every transaction has zero economic cost. Secondary-market prices may include a dealer markup or markdown, and broker-assisted orders may carry a separate fee. Review the broker’s fixed-income pricing disclosure before submitting an order.

Account type and settled cash

T-bills may be available in taxable brokerage accounts, traditional or Roth IRAs, and some cash-management accounts. Tax treatment depends on the account:

Taxable brokerage account: Treasury interest is generally federally taxable but exempt from state and local income tax.
Traditional IRA: Income generally grows tax-deferred, with taxes typically applying to taxable distributions.
Roth IRA: Qualified distributions may be tax-free when applicable requirements are met.

Make sure the account contains enough settled cash before the order’s settlement deadline. Proceeds from a recent deposit or security sale may not yet be available for a Treasury purchase. The broker’s “cash available to trade” figure may also differ from its “settled cash” figure.

Step-by-Step: Buy Treasury Bills Through a Brokerage

Sign in and locate the fixed-income marketplace. Open the broker’s bonds, fixed-income, CDs, or Treasury trading page. This section may be less prominent than the stock-trading screen.
Select Treasury bills. Separate bills from Treasury notes, bonds, inflation-protected securities, and agency debt. Bills have remaining maturities of one year or less and normally do not pay coupons.
Filter the available securities. Review maturity date, auction date, settlement date, price, yield, minimum purchase, and quantity increments. Match the maturity to the date when the cash may be needed.
Choose a new issue or secondary-market bill. A new issue is purchased through an auction, while a secondary-market bill has already been issued and is being bought from another market participant.
Open the security details. Verify the bill’s CUSIP identifier, maturity date, expected settlement date, quoted yield, and minimum order. Confirm whether the displayed quote is a bid, ask, or estimated auction yield.
Enter the face-value quantity. Broker interfaces vary. One broker may treat a quantity of 10 as $10,000 of face value, while another may display the total face value directly. Read the order ticket carefully.
Review the estimated cost. The cash required will normally be below the face value, but it may not be known precisely for a new-issue auction. Review any fee, markup, settlement amount, and accrued cash requirement shown on the preview screen.
Submit and monitor the order. Check the broker’s orders or account activity page. A submitted order is not the same as a completed purchase; confirm that it was filled and settled.
Record the maturity date. After settlement, verify that the bill appears in the portfolio. Add its maturity date to a calendar and decide whether the proceeds will be withdrawn, reinvested, or used for another goal.

How T-Bill Prices, Discounts, and Yields Work

The basic return calculation is straightforward. If a bill is held to maturity, its approximate holding-period return is:

(Face value − Purchase price) ÷ Purchase price

Suppose an investor pays $9,800 for a bill that will pay $10,000 at maturity:

Face value: $10,000
Purchase price: $9,800
Profit at maturity: $200
Holding-period return: $200 ÷ $9,800 = approximately 2.04%

The 2.04% figure is the return for the actual holding period, not an annual return. If the bill has approximately 182 days until maturity, a simplified annualized calculation would be:

2.04% × (365 ÷ 182) = approximately 4.09%

This simplified annualization is useful for illustration, but the broker’s official yield may differ because of day-count conventions, compounding assumptions, settlement timing, and rounding.

Discount rate

The bank discount rate measures the discount relative to the bill’s face value, generally using a 360-day year. Because it uses face value rather than the lower amount invested, it is not the same as the investor’s holding-period return.

Investment rate or bank-equivalent yield

An investment rate or bank-equivalent yield is intended to make a bill more comparable with interest-bearing investments quoted on an annual basis. It generally relates the return to the purchase price rather than face value and adjusts for the applicable annualization convention.

Yield to maturity

Yield to maturity estimates the annualized return from buying the bill at the quoted price and holding it until maturity. For a zero-coupon security such as a T-bill, the calculation is based on the difference between the purchase price and maturity value.

Brokers do not always label or calculate these fields identically. Compare yields using the same convention, and consult the broker’s glossary when two screens appear to show conflicting numbers.

An annualized yield is a comparison tool. It does not mean the investor will earn that percentage of the principal during a three- or six-month holding period, and it does not guarantee that the same rate will be available when the proceeds are reinvested.

Choosing a Maturity and Estimating Your Return

Common bill terms include 4, 8, 13, 17, 26, and 52 weeks when offered. Availability may vary by auction cycle and broker inventory.

The most practical selection method is to begin with the date when the money will be needed. If tuition is due in six months, for example, a bill maturing shortly before that deadline may be more appropriate than a 52-week bill. Matching assets with spending dates reduces the chance that the security must be sold early.

Worked $10,000 example

Assume a secondary-market listing shows a $10,000 face-value bill with about 182 days remaining and an estimated purchase price of $9,800.

Estimated cash paid: $9,800
Amount received at maturity: $10,000
Estimated income: $200
Holding-period return: approximately 2.04%
Simplified annualized yield: approximately 4.09%

This example excludes taxes, fees, markups, and reinvestment. The order preview may also show a slightly different final cost because Treasury prices are quoted using market conventions rather than as a simple retail dollar amount.

Build a T-bill ladder for recurring liquidity

A ladder divides money among bills with different maturity dates. Instead of investing $24,000 in one bill, an investor might place $6,000 into four maturity groups scheduled to mature approximately one month apart.

As each bill matures, the investor can use the cash or reinvest it at the current yield. This creates recurring liquidity and reduces the risk of committing the entire balance at a single rate. It does not eliminate reinvestment risk: future yields could be lower.

New-Issue Auctions vs. Secondary-Market T-Bills

New-issue auction

At a new-issue auction, the Treasury determines the final price and investment rate through the auction process. An individual placing a noncompetitive order agrees to accept the resulting rate. The broker may display an estimated yield, but the exact price and yield are not known when the order is entered.

New issues can be attractive when the broker charges no online transaction fee and the investor is comfortable waiting for the auction and settlement schedule.

Secondary market

A secondary-market T-bill has already been issued. Its current ask price and estimated yield are normally displayed before the order is submitted, although prices can change while the market is open.

The secondary market offers more flexibility in maturity dates. Instead of choosing only among upcoming auction terms, an investor may find a bill maturing close to a specific spending deadline.

Liquidity does not guarantee price stability. If market interest rates rise after the purchase, the bill’s market value will generally fall. If rates decline, its market value may rise. Holding to maturity avoids realizing these interim price changes, assuming the U.S. Treasury makes the scheduled payment. Selling early can generate a gain or loss, and the bid-ask spread can reduce the proceeds.

T-Bill Taxes, Risks, and What to Do Next

Federal, state, and local taxes

In a taxable account, T-bill interest is generally subject to federal income tax but exempt from state and local income taxes. The taxable income is generally the interest or discount earned between the purchase amount and the maturity payment.

For many individual investors using the cash method of accounting, income from a short-term bill held to maturity is reported for the year in which it matures. A broker may report it on Form 1099-INT. Selling before maturity or buying a previously issued bill at a market discount can introduce additional rules and may also result in Form 1099-B reporting.

Broker tax documents should be reviewed carefully, especially when bills were purchased in the secondary market or sold before maturity. Tax treatment depends on the transaction and account type, so consult a qualified tax professional for advice about a specific situation.

Risks to understand

Reinvestment risk: The next bill may offer a lower yield when the current bill matures.
Inflation risk: Inflation may reduce the purchasing power of the principal and income.
Interest-rate risk: A bill’s market price can fall if rates rise before maturity.
Early-sale risk: Selling before maturity can produce a loss even when the bill would have paid face value at maturity.
Pricing-spread risk: Dealer markups, markdowns, and bid-ask spreads can reduce the effective return.
Settlement risk: Unsettled cash or a missed funding deadline can prevent an order from completing.
Liquidity-timing risk: Sale proceeds and maturity payments may not be available at the exact moment an expense is due.

What to Do Next

Confirm that the brokerage account supports Treasury auctions and secondary-market trading.
Check the account’s settled cash rather than relying only on its total balance.
Compare live quotes for several maturities using the same yield convention.
Select a maturity date that falls before the money will be needed.
Review the minimum face value, quantity increment, estimated cost, and any trading fee or markup.
Consider placing a small test order before committing a larger balance.
After settlement, verify the holding and add the maturity date to a calendar.
Decide in advance whether to withdraw or reinvest the maturity proceeds.

Buying Treasury bills through a brokerage account can be straightforward once the fixed-income order screen becomes familiar. The central decisions are how long to invest, whether to use an auction or the secondary market, and whether the quoted return is sufficient after taxes and transaction costs. Start with the date when the cash will be needed, then compare current prices and yields rather than choosing a bill based on yield alone.

This article is for educational purposes and does not provide personalized investment, tax, or legal advice.