How to Buy Treasury Bills on TreasuryDirect: Auto-Roll, Maturity Dates, and Reinvestment Strategy
Treasury bills can put short-term cash to work without requiring a long commitment. Through TreasuryDirect, individual investors can purchase bills directly at U.S. Treasury auctions, hold them until maturity, and optionally reinvest the proceeds automatically.
The process is relatively simple once you understand three details: you will not know the final yield when submitting your order, TreasuryDirect is designed primarily for holding rather than trading, and an automatic reinvestment commits the proceeds to another bill of the same term.
Treasury Bills on TreasuryDirect: What You’re Buying
A Treasury bill, or T-bill, is a short-term debt security issued by the U.S. government. Bills do not make periodic coupon payments. Instead, they are generally sold for less than their face value and pay their full face value at maturity.
For example, a bill with a $1,000 face value might cost $987.50. At maturity, the Treasury pays $1,000. The $12.50 difference is the investor’s interest income. The actual price depends on the yield established at auction and the bill’s time to maturity.
TreasuryDirect commonly offers bills with terms including:
- 4 weeks
- 8 weeks
- 13 weeks
- 17 weeks
- 26 weeks
- 52 weeks
Auction schedules and available securities can change, so investors should confirm current offerings on the TreasuryDirect website. The minimum purchase is $100, and additional amounts must be entered in $100 increments.
The auction rate is not known in advance
Individual investors normally submit noncompetitive bids through TreasuryDirect. A noncompetitive bidder specifies the face amount to buy but agrees to accept the rate established by the auction’s competitive bidding process.
That means you will know the bill’s term and face value when placing the order, but not its exact purchase price or final investment rate. After the auction, Treasury publishes results that include the high rate, investment rate, and price per $100 of face value.
This differs from purchasing an existing Treasury bill in the secondary market, where a brokerage generally displays a current price and estimated yield before the trade is submitted.
Who Should Buy T-Bills Through TreasuryDirect?
TreasuryDirect is best suited to investors who expect to hold their bills until maturity. It provides direct access to Treasury auctions without requiring a traditional brokerage account.
It may be useful for:
- Cash that is not needed until a known future date
- Short-term savings goals
- Emergency-fund reserves beyond immediately available cash
- Investors who prioritize securities backed by the full faith and credit of the U.S. government
- People who want to build a recurring T-bill ladder
T-bills have very low credit risk, but they are not the same as a bank deposit and are not FDIC-insured. Their government backing comes from the Treasury’s obligation to repay the security.
When a brokerage may be more practical
TreasuryDirect is less suitable for investors who may need to sell before maturity. The platform does not provide a button for selling marketable securities. A bill must first be transferred to a bank, broker, or dealer that can sell it in the secondary market.
Newly purchased marketable securities generally must remain in TreasuryDirect for at least 45 calendar days before they can be transferred. That restriction can create a meaningful liquidity problem when buying very short-term bills.
| Feature | TreasuryDirect | Brokerage account |
|---|---|---|
| Primary-auction access | Yes | Often available, depending on the broker |
| Secondary-market purchases | No | Usually available |
| Sell before maturity | Not directly | Generally available during market hours |
| Automatic reinvestment | Available for eligible securities | Depends on the broker |
| Best fit | Buy-and-hold investors | Investors who value liquidity and trading access |
How to Buy Treasury Bills on TreasuryDirect
You need an established TreasuryDirect account and a valid funding source before purchasing a bill. Confirm that the linked bank account and routing information are correct before placing an order.
- Log in to your TreasuryDirect account.
- Select BuyDirect from the navigation menu.
- Choose Bills under Marketable Securities.
- Select an available term and auction date.
- Enter the purchase amount in $100 increments.
- Choose whether to schedule reinvestments.
- Select the payment destination and funding source shown by TreasuryDirect.
- Review the request carefully and submit the noncompetitive bid.
The auction date is when the Treasury determines the auction results. The issue date is when the security is delivered and payment settles. These dates are not necessarily the same.
Actionable purchase example
Suppose you want $5,000 of a 13-week bill. You select the appropriate auction, enter $5,000 as the face amount, and submit a noncompetitive bid. If the auction produces a price of $98.70 per $100 of face value, the hypothetical purchase cost would be:
$5,000 × 0.9870 = $4,935
TreasuryDirect would debit $4,935 on the issue date, subject to the actual auction results. At maturity, the bill would pay $5,000. The $65 difference would be interest income.
After the auction, review the official results rather than relying only on the discount rate. The published investment rate is designed to make the return easier to compare with other annualized investments. The discount rate, purchase price, and investment rate describe related but different calculations.
TreasuryDirect Auto-Roll: How Reinvestment Works
“Auto-roll” is a common informal term for TreasuryDirect’s reinvestment feature. When a bill matures, its proceeds are used to buy another bill with the same term.
For example, reinvesting a 13-week bill means buying another 13-week bill at the applicable auction. It does not mean choosing whichever Treasury security has the highest yield at that time.
You can select reinvestment when placing the original order. You can also manage the instructions later by logging in, opening ManageDirect, and selecting the appropriate option under Manage My Securities.
TreasuryDirect generally allows an investor to schedule, edit, or cancel a reinvestment until four business days before the original bill matures. Weekends and federal holidays can affect that deadline, so waiting until the last calendar day is risky.
What happens to the discount during reinvestment?
A maturing bill pays its full face value, while the replacement bill will normally cost less than its face value. TreasuryDirect applies the required amount to the new security. Any difference is handled according to the account’s payment instructions and TreasuryDirect’s reinvestment procedures.
Assume a $5,000 bill matures and the next $5,000 bill costs $4,940. The new bill receives $4,940, while the remaining $60 is not added to the new bill’s face value. Investors should check their account and bank activity after settlement to confirm how the difference was disbursed.
Maturity Dates, Proceeds, and What Happens Automatically
The maturity date determines when a bill stops earning its auction-based return and its face value becomes payable. Because bills do not make periodic interest payments, investors normally receive their return at maturity.
If no reinvestment is scheduled, TreasuryDirect redeems the bill automatically. The principal is deposited into the designated bank account on the maturity date unless the investor has instructed TreasuryDirect to direct the funds to the account’s Certificate of Indebtedness, or C of I.
A C of I is a non-interest-bearing security within TreasuryDirect that can hold funds for future purchases. Leaving money there may simplify a later Treasury purchase, but the balance does not earn interest while waiting.
Example T-bill timeline
- Order submitted: You request $10,000 of a 26-week bill through BuyDirect.
- Auction date: Competitive bidding determines the final rate and price.
- Issue and settlement date: TreasuryDirect delivers the bill and collects the discounted purchase price.
- Holding period: The bill remains in the account and makes no periodic interest payments.
- Maturity date: The $10,000 face value is redeemed or used for a scheduled reinvestment.
Record the auction date, issue date, maturity date, face value, purchase price, and reinvestment status in a calendar or spreadsheet. Setting a reminder at least one week before maturity provides time to review the four-business-day reinvestment deadline.
Reinvestment Strategies: Auto-Roll, Ladders, and Cash Flexibility
Use auto-roll for ongoing short-term Treasury exposure
Automatic reinvestment can work well when the money has no immediate spending purpose and the objective is to maintain continuous exposure to short-term Treasuries. It reduces the administrative work of entering a new purchase every few weeks or months.
The trade-off is reduced flexibility. The replacement bill’s yield is determined by a future auction and may be higher or lower than the original yield. Automatically reinvesting also means the cash will not be readily available on the maturity date.
Build a T-bill ladder
A ladder divides money among bills with different maturity dates. Instead of putting $12,000 into one bill, an investor could place $3,000 into each of four bills scheduled to mature at roughly monthly intervals.
As each bill matures, the investor can:
- Spend the proceeds
- Hold the proceeds as cash
- Reinvest in a new bill at the end of the ladder
- Redirect the money to a different investment
This structure creates regular decision points and reduces the chance that the entire balance will be inaccessible when an unexpected expense occurs. It also spreads reinvestment across multiple auctions rather than locking the entire portfolio into one future rate.
Match maturities to planned expenses
Known expenses should drive maturity selection. If a $6,000 property-tax payment is due in six months, a bill maturing before the payment deadline may be more appropriate than repeatedly rolling a shorter bill.
Allow several business days between maturity and the expense. Bank processing, holidays, incorrect payment instructions, or other operational issues can make a same-day maturity strategy unnecessarily fragile.
Keep some bills unrolled
Not every position needs automatic reinvestment. An investor might roll three parts of a four-part ladder while allowing the fourth to redeem into a bank account. That creates periodic cash-flow windows without dismantling the entire strategy.
This approach can be useful when future expenses are uncertain. It provides more access to cash while keeping most of the portfolio invested.
Liquidity Limits and Other T-Bill Risks
T-bills are commonly described as low-risk investments, but “low risk” does not mean risk-free in every practical sense.
- Liquidity risk: TreasuryDirect does not offer direct selling, and a newly purchased bill generally cannot be transferred for 45 days.
- Interest-rate risk: If a bill is transferred and sold before maturity, its market price may be lower than its purchase price when prevailing yields have risen.
- Reinvestment risk: A replacement bill may earn a lower yield than the maturing bill.
- Opportunity-cost risk: Locking in a bill can prevent the investor from taking advantage of a better rate elsewhere during the holding period.
- Settlement risk: Incorrect bank information or insufficient funds can interfere with a purchase or expected cash flow.
- Unexpected cash needs: A bill may mature too late to cover an emergency, especially when transferring and selling it would be cumbersome.
Interest from Treasury bills is generally subject to federal income tax but exempt from state and local income taxes. Tax treatment can depend on individual circumstances, so investors should consult an appropriate tax professional when needed.
What to Do Next
Before submitting a TreasuryDirect purchase, complete this checklist:
- Confirm that the linked bank account and routing number are current.
- Keep immediately needed emergency cash outside TreasuryDirect.
- Choose a bill term that matches the expected use of the money.
- Review the auction, issue, and maturity dates separately.
- Decide whether automatic reinvestment supports the cash-flow plan.
- Set a reminder before the four-business-day reinvestment deadline.
- Record the final purchase price and investment rate after the auction.
- Use a brokerage instead if convenient pre-maturity selling is important.
TreasuryDirect can be an efficient choice for buying and holding T-bills, particularly when maturity dates are matched to specific goals. Auto-roll reduces maintenance, while a ladder provides more frequent access to cash. The right approach depends less on predicting rates and more on planning when the money must become available.
This article provides educational information only and is not individualized investment, tax, legal, or financial advice.