The simple version

The U.S. government keeps its deposits at the Federal Reserve, not at an ordinary bank, in an account called the Treasury General Account, or TGA. Money paid to the government flows into it, and the government's payments flow out of it.

The part that matters beyond trivia is where that account sits. It is on the Federal Reserve's own books. So when the balance in it rises or falls sharply, something else on those books has to move too, and that something is often the reserves the banking system holds at the Fed.

The numbers

• The Treasury General Account represents the U.S. government's deposits held with the Federal Reserve and is used to facilitate payments from and to the government (Federal Reserve Board staff, FEDS Notes)
• TGA balances have been volatile in recent years, with large declines during periods when the debt ceiling was binding and large increases after it was raised (Federal Reserve Board staff, FEDS Notes)
• When the TGA fluctuates, something else on the Fed's balance sheet must adjust for it to balance; the note names four candidates: reserves, overnight reverse repurchase agreement (ON RRP) balances, securities, or lending (Federal Reserve Board staff, FEDS Notes)
• Under what the note calls an ample reserves approach, reserves adjust to TGA fluctuations in the opposite direction, and the Fed has mostly followed that approach since the global financial crisis (Federal Reserve Board staff, FEDS Notes)
• An ample supply of reserves limits the interest rate effects of TGA fluctuations, because banks then operate on a fairly flat part of their reserve demand curve (Federal Reserve Board staff, FEDS Notes)
• The Fed's weekly balance sheet release lists the U.S. Treasury General Account among the factors, other than reserve balances, absorbing reserve funds (Federal Reserve Board, H.4.1)

Why the government's cash account moves bank reserves

Start with where money sits at the Fed. Banks keep reserves there. The Treasury keeps its deposits there too, in the TGA. Both show up on the same side of the Fed's books, as money the Fed is holding for someone else.

Those books have to balance. If the Treasury's account fills up and nothing else on the Fed's books changes, another of those entries has to shrink by the same amount. As the note describes how the Fed has mostly operated, that other entry is bank reserves. So when money flows into the government's account, reserves in the banking system tend to fall.

It runs the other way too. When the government spends its balance down, that money goes out to the people and businesses it pays, and reserves tend to rise. The government's account and bank reserves act like a seesaw, with the Fed's books as the fulcrum.

The note points to stretches when the debt ceiling was binding and the account fell sharply, and the stretches after the ceiling was raised, when it was rebuilt. Those swings move reserves without any change in Fed policy.

What this means

For a normal person this never shows up on a bank statement, but it is one reason the reserves banks hold at the Fed can rise and fall without any Fed decision behind it.

The durable point is that the government's main account is not off to the side; it sits inside the Federal Reserve's balance sheet, so its swings ripple into the reserves available to banks. Knowing that helps make sense of headlines about the Treasury's cash balance.

What this is NOT

This is not advice about investments, savings, or any financial decision, and it is not a prediction of interest rates or market conditions. It explains what the Treasury General Account is and how its balance interacts with bank reserves, as a Federal Reserve Board staff FEDS Note and the Fed's weekly balance sheet release describe it; FEDS Notes present their authors' own views, not the Board's. The opposite movement in reserves holds under the ample reserves approach and when other items on the Fed's balance sheet do not change; balances at the overnight reverse repo facility, securities, or lending can also absorb the swings. This is not a political endorsement or criticism of anyone.

Sources

• Federal Reserve Board, FEDS Notes, Annette Vissing-Jorgensen, Fluctuations in the Treasury General Account and their effect on the Fed's balance sheet, August 6, 2025, read November 13, 2026: https://www.federalreserve.gov/econres/notes/feds-notes/fluctuations-in-the-treasury-general-account-and-their-effect-on-the-feds-balance-sheet-20250806.html
• Federal Reserve Board, H.4.1, Factors Affecting Reserve Balances, release of November 12, 2026, read November 13, 2026: https://www.federalreserve.gov/releases/h41/current/