The Bureau of Internal Revenue (Filipino: Kawanihan ng Rentas Internas, or BIR) is an agency of Department of Finance. BIR collects more than half of the total revenues of the government.
The powers and duties of the Bureau of Internal Revenue are:
Reduction and collection of all internal revenue taxes, fees and charges;
Enforcement of all forfeitures, penalties, and fines connected therewith, including the execution of judgments in all cases decided in its favor by the Court of Tax Appeals and the ordinary courts;
It shall also give effect to the administer supervisory and police powers conferred to it by the National Internal Revenue Code and special laws.