The Alcohol and Tobacco Tax and Trade Bureau (TTB) is responsible for enforcing and administering laws covering the production, use, and distribution of alcohol and tobacco products. TTB also collects excise taxes for firearms and ammunition.

The Bureau of Engraving & Printing (BEP) designs and manufactures U.S. currency, securities, and other official certificates and awards.

The Bureau of the Fiscal Service was formed from the consolidation of the Financial Management Service and the Bureau of the Public Debt. Its mission is to promote the financial integrity and operational efficiency of the U.S. government through exceptional accounting, financing, collections, payments, and shared services.

The Financial Crimes Enforcement Network (FinCEN) supports law enforcement investigative efforts and fosters interagency and global cooperation against domestic and international financial crimes. It also provides U.S. policy makers with strategic analyses of domestic and worldwide trends and patterns.

The Inspector General conducts independent audits, investigations and reviews to help the Treasury Department accomplish its mission; improve its programs and operations; promote economy, efficiency and effectiveness; and prevent and detect fraud and abuse.

The Treasury Inspector General for Tax Administration (TIGTA) provides leadership and coordination and recommends policy for activities designed to promote economy, efficiency, and effectiveness in the administration of the internal revenue laws. TIGTA also recommends policies to prevent and detect fraud and abuse in the programs and operations of the IRS and related entities.

The Internal Revenue Service (IRS) is the largest of Treasury's bureaus. It is responsible for determining, assessing, and collecting internal revenue in the United States.

The Office of the Comptroller of the Currency (OCC) charters, regulates, and supervises national banks to ensure a safe, sound, and competitive banking system that supports the citizens, communities, and economy of the United States.

The U.S. Mint designs and manufactures domestic, bullion and foreign coins as well as commemorative medals and other numismatic items. The Mint also distributes U.S. coins to the Federal Reserve banks as well as maintains physical custody and protection of our nation's silver and gold assets.