History of the IRS Timeline

President Truman's Reorganization Plan No. 26 of 1950 took full effect in 1952, professionalizing the tax collection bureaucracy and replacing political patronage positions with career civil servants. The Bureau of Internal Revenue was renamed the Internal Revenue Service.

Image source: Reorganization Plan No. 3 of 1970

The IRS consolidated its headquarters operations in the Washington, D.C. area, eventually settling in the New Carrollton Federal Building complex in Maryland, centralizing administration of the rapidly growing federal tax system.

The Tax Reform Act of 1969 reduced individual rates while raising taxes on capital gains and cracking down on tax shelters. It represented one of the most significant overhauls of the tax code and expanded IRS administrative responsibilities.

President Reagan signed the Tax Reform Act of 1986, the most sweeping overhaul of the tax code since 1954. It lowered top marginal rates, broadened the base, and eliminated numerous deductions, requiring the IRS to implement extensive new procedures.

Image source: Tax Reform Act of 1986

After congressional hearings documented aggressive IRS collection practices, Congress passed the Restructuring and Reform Act of 1998. It reorganized the IRS around customer service divisions, shifted the burden of proof to the IRS in some cases, and created an independent IRS Oversight Board.

Image source: Internal Revenue Service Restructuring and Reform Act of 1998

The Affordable Care Act assigned the IRS major roles in administering premium tax credits and enforcing the individual shared responsibility provision, expanding the agency's duties beyond traditional revenue collection into health policy implementation.

The Inflation Reduction Act appropriated roughly $80 billion over ten years to the IRS for enforcement, technology modernization, and taxpayer services. The funding aimed to close the tax gap and rebuild the agency's chronically underfunded systems, though some amounts were later rescinded.

Investigations by Congress revealed that the IRS had been used to audit political enemies and harass dissident groups, most notoriously through its Special Service Staff. The scandal led to reforms restricting the use of tax records and enforcement for political purposes.

Image source: Church Committee

Responding to revelations of IRS abuse, the Tax Reform Act of 1976 added significant taxpayer safeguards, including restrictions on disclosure of tax returns and limits on the IRS's ability to conduct certain investigations.

The Omnibus Taxpayer Bill of Rights of 1988 granted taxpayers formal procedural protections, including the right to be informed of appeals processes, protection from abusive collection actions, and compensation for IRS misconduct.

Image source: Taxpayer Bill of Rights

The IRS acknowledged that applications for tax-exempt status from Tea Party and conservative groups had received extra scrutiny using inappropriate criteria. The revelation triggered congressional investigations, resignations of senior officials, and lasting scrutiny of the exempt organizations division.

Image source: IRS targeting controversy

Lois Lerner, head of the IRS Exempt Organizations unit, refused to answer questions at a House committee hearing regarding the targeting controversy, invoking her Fifth Amendment rights. She later retired amid the ensuing investigations.

Image source: Lois Lerner

Building on pilot programs begun in the mid-1980s, the IRS significantly expanded electronic filing in 1990, allowing taxpayers across the country to submit returns electronically. E-filing would grow to become the dominant method of filing returns.

The IRS partnered with private software companies to launch Free File, providing free online tax preparation and e-filing services to lower- and middle-income taxpayers as part of a public-private initiative to encourage electronic filing.

Image source: Free File Alliance

Under the Economic Stimulus Act of 2008, the IRS distributed rebate payments to millions of American households to counter the recession. The operation tested the IRS's capacity for large-scale direct payments to individuals.

Image source: Economic Stimulus Act of 2008

The stimulus legislation created numerous new tax credits such as Making Work Pay, the first-time homebuyer credit, and energy incentives, dramatically increasing the IRS's administrative workload and outreach obligations during the Great Recession.

The IRS disclosed that criminals had used stolen identity data to access approximately 100,000 taxpayer transcripts through its online Get Transcript application, highlighting serious cybersecurity weaknesses and prompting reforms of online authentication.

Image source: Voice phishing

The IRS launched its multi-year modernization plan to redesign taxpayer services, improve online accounts, simplify notices, and upgrade legacy IT systems, aiming to bring the agency's technology infrastructure into the twenty-first century.

Under the CARES Act and subsequent relief legislation, the IRS delivered three rounds of economic impact payments totaling hundreds of billions of dollars to American households, deploying online tools like Get My Payment at unprecedented scale during the COVID-19 pandemic.