https://slickdeals.net/f/16642112-u-s-treasury-short-term-treasury-bills-4-week-52-week-maturity-up-to-5-50-interest#comments Besides TreasuryDirect, the Treasury Auctions (i.e. not secondary market) are also purchasable via 5 brokerages: Fidelity, Charles Schwab, TD Ameritrade, E*TRADE, and Vanguard, as far as I'm aware. Merrill Edge: supposedly could do so, but only over the phone, which incurs a fee. (Correct me if I'm wrong) Pros and cons amongst each brokerage are not that far apart (in my opinion) but mainly boil down to the following: -Minimum purchase quantity (most are $1k, while E*TRADE is $5k) -Automatic reinvestment (Fidelity has this, while E*TRADE does not) The major differences between buying on TreasuryDirect vs brokerages are the following: -Convenience. You cannot purchase auction treasuries a month ahead of time at brokerage vs being able to do so on TreasuryDirect. This can be alleviated if you look at the Auction announcement dates at