Open an account with a brokerage, bank, or TreasuryDirect
Decide whether to buy new-issue Treasury bonds or existing bonds on the secondary market
If buying new-issue bonds, go to TreasuryDirect or use a broker during a Treasury auction
If buying on TreasuryDirect, create an account and link your bank account
Log in and choose the Treasury bond, note, or bill you want to buy
Enter the purchase amount
Review the purchase details and submit the order
If buying through a broker, place a buy order for the Treasury security you want
Fund your brokerage account if needed
Confirm settlement and record the maturity date and interest payments
Hold the bond until maturity or sell it earlier through your broker if needed