T-bills are issued through a public auction process conducted by the U.S. Department of the Treasury. These auctions happen regularly, with 4-week, 8-week, 13-week, 17-week, and 26-week T-bills auctioned every week, and 52-week T-bills auctioned every four weeks. You can participate in these auctions directly through the TreasuryDirect website or through a bank or broker (which might charge a fee). When you bid for a T-bill, you specify the amount you want to invest. The Treasury then determines the highest accepted yield based on all the bids received, and your T-bill is issued at a corresponding discount price. Once purchased, you simply hold the T-bill until its maturity date. On maturity, the face value is automatically deposited into your linked bank account if you bought it through TreasuryDirect, or into your brokerage account if you used a broker. The interest earned from T-bills is generally subject to federal income tax, but it is exempt from state and local income taxes. For tax purposes, the discount is treated as interest income and is reported to you on Form 1099-INT, Interest Income, from TreasuryDirect or your broker. This income is typically recognized in the year the T-bill matures, also known as the cash method of accounting for interest, as described in IRS Publication 550, Investment Income and Expenses.