Taxation in Iran is levied and collected by the Iranian National Tax Administration under the Ministry of Finance and Economic Affairs of the Government of Iran. In 2008, about 55% of the government's budget came from oil and natural gas revenues, the rest from taxes and fees. An estimated 50% of Iran's GDP was exempt from taxes in FY 2004. There are virtually millions of people who do not pay taxes in Iran and hence operate outside the formal economy. The fiscal year begins on March 21 and ends on March 20 of the next year.

The Central Bank of Iran (CBI), also known as Bank Markazi, officially the Central Bank of the Islamic Republic of Iran is the central bank of Iran.