Federal Accounting Dictionary - Treasury Account Symbols

When you start your federal accounting career, understanding Treasury Account Symbols (TAS) is only sometimes explained on day one. Yet, knowing what they are is crucial to effective budget management—and, more importantly, it can help keep you out of hot water. Misuse of federal funds is a serious issue, and understanding TAS is critical to avoiding costly mistakes.

Let's make learning this foundational topic a building block of your Federal Accounting Continuing Professional Education (CPE) journey. By the end of this article, you'll have a clear grasp of Treasury Account Symbols and their role in ensuring proper and compliant government spending.
Parts of a Treasury Account Symbol. Parts include Agency ID, Period of Availability, and Main Account.

Breaking Down the Treasury Account Symbol (TAS)

Numbers 012, X, 4336 highlighted with colored arrows and labels: orange for Agency ID, blue for Period of Availability, green for Main Account.
A Treasury Account Symbol (TAS) consists of three distinct components, each crucial to tracking federal funds. Together, these components provide a complete picture of who is responsible for the funds, when they can be used, and what they are intended for. Understanding these elements is key to managing federal budgets effectively and staying compliant with financial regulations.

Agency ID: Who Gets the Funds

The Agency ID is a three-digit number identifying the federal agency responsible for the funds. For example:

  • 000: The Senate
  • 010: The Judiciary
  • 089: The Department of Energy


These IDs ensure that funds are allocated to the correct government agency.

Period of Availability: When Funds Can Be Used

The Period of Availability specifies when funds can be used:

  • Annual Funds: Available for one fiscal year (e.g., 2022).
  • Multi-Year Funds: Available for multiple years (e.g., 2022/2024).
  • No-Year Funds (X): Available until the funds are exhausted or the intended purpose is fulfilled.


This component helps funds be used within their legal timeframe, preventing misuse and violations of the Anti-Deficiency Act. This law prohibits federal agencies from spending funds for an amount not authorized by Congress.


Main Account: The Purpose of the Funds

The Main Account identifies the specific purpose for which the funds are designated. The same Main Account number can have different meanings across various agencies. For example:

  • 0101 for the Senate relates to travel expenses, specifically mileage reimbursements for the Vice President and Senators.
  • 0101 at the American Battle Monuments Commission represents funds allocated for managing foreign currency fluctuations.
  • 0101 for the National Endowment for the Arts signifies the Arts and Artifacts Indemnity Fund.


This variation highlights the importance of understanding the context within each agency to ensure that funds are used for their intended purpose.

Want to go deeper? 

This term is covered in our federal accounting CPE course on Introduction to U.S. Treasury Account Symbols (TAS).