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Updated May 20, 2024
The IRS Technology Modernization Program: An Overview

The Internal Revenue Service (IRS) collects 95% of the
funds needed to operate federal government programs and
agencies. In FY2023, the agency collected $4.7 trillion in
gross revenues, processed 272 million tax returns and other
forms, and issued $659 billion in refunds. The IRS's
information technology (IT) systems are critical to this
output.
The capabilities of those systems have long been a concern
to taxpayers, tax professionals, and lawmakers, among
others. Critics regard key elements of the IRS's information
systems as outdated, inefficient, and ill-suited to achieving
the service's current strategic goals. These systems rely on
core legacy computer systems installed in the 1960s that
operate on computer programming languages such as
Common Business Oriented Language (COBOL) and
Assembly Language Code. The Government Accountability
Office (GAO) maintains that legacy systems like the IRS's
contribute to security risks, unmet mission needs, staffing
concerns, and increased costs.
The IRS has pursued several major technology
modernization initiatives since the 1970s. It has spent
billions of dollars on its current effort, the Business
Systems Modernization (BSM) program, which started in
the late 1990s. In recent years, the program has emphasized
projects intended to expand and digitize taxpayer services
(e.g., creating online taxpayer accounts for expedited case
management). Central to such projects is the replacement of
the IRS's COBOL-based Individual and Business Master
Files, which are still used in the processing of individual
and business returns.
This In Focus briefly reviews the evolution of the BSM
program and discusses some of the policy issues it raises.
volution of the BSM Programn
The BSM program focused on several technology
development initiatives in its early years. Foremost among
them was the Customer Account Data Engine (CADE 1),
which was intended to replace the Individual Master File
with a faster, more efficient, and more secure taxpayer data
management system. In 2004 congressional testimony,
GAO's Robert F. Dacey referred to CADE as the linchpin
modernization project because most IRS information
systems depended directly and indirectly on the file's data.
IRS officials initially estimated that CADE 1 would cost
$66 million and would be ready for deployment by late
2001. In 2009, after a string of delivery delays and cost
overruns, the IRS stopped working on the project.
In 2010, the IRS began to develop a successor to CADE 1
known as CADE 2. The project was slated to be finished in
three phases, the first two of which were to be completed by

January 2014. The GAO reported that only the first phase
was completed by January 2014. According to the IRS's
latest projection, CADE 2 should be fully deployed by
FY2028.
The IRS made significant changes in the BSM program
when it launched a six-year plan (called the IRS Integrated
Modernization Business Plan or IMBP) in April 2019 to
make major improvements in taxpayers' interactions with
the IRS. The plan revolved around projects intended to (1)
expand online access to taxpayer information and other IRS
services, (2) reduce call-wait and case-resolution times, (3)
accelerate the processing of tax returns and refunds, (4)
simplify the verification of taxpayer identities, and (5) retire
millions of lines of legacy IT code. The IRS initially
projected that these projects would be completed by
FY2024 at a cost between $2.3 billion and $2.7 billion.
An infusion of multiyear funding for the IRS under the
Inflation Reduction Act (P.L. 117-115, IRA, see below for
more details) seemingly has imparted new momentum to
the IRS's long-standing technology modernization efforts.
In April 2023, the IRS issued a Strategic Operating Plan
(SOP) for using the $79 billion in mandatory IRA funding
the agency was to receive between FY2022 and FY2031,
including $4.8 billion in BSM funds. This funding is in
addition to IRS discretionary funding in that period. One of
the SOP's five objectives was to deliver cutting-edge
technology, data, and analytics to operate more effectively.
In a 2024 update of the SOP, the IRS stated that it is
planning to undertake 18 technology modernization projects
between FY2023 and FY2025, at a total cost in IRA funds
of $3.3 billion. Three projects are expected to account for a
significant portion of that expenditure: Enterprise Case
Management, Individual Master File Modernization, and
Identity and Access Management.
Funding
Congress set up a special appropriations account in FY1997
(the Information Technology Investment Account) for the
BSM program. Since FY1998, BSM funds have been
available only for the acquisition, development, and
implementation of products and services related to
modernization projects; they may not be used for the
maintenance and operation of the IRS's existing IT
systems, the cost of which is covered by a different
appropriations account.
Initial BSM funding was $295 million in FY1998. This
amount has fluctuated ever since. Funding peaked in
FY2002 (in current dollars) at $406 million and remained
above $300 million until FY2005, when it fell to $203
million. BSM appropriations remained below $300 million
until FY2012, when they rose to $330 million. Funding

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