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   Congressional                                                                ____
          '~Research Service
   .... ..      nformrng the Ieg Iastive debate since 1914





Behavioral Economics, IRS Letter Campaigns,

and Tax Compliance



August 1, 2019
Research from the fields of behavioral economics and behavioral science suggests there may be cost-
effective ways for the Internal Revenue Service (IRS) to increase tax compliance and collections. This
Insight discusses one relatively simple approach to potentially increase compliance: carefully crafted
letters to taxpayers. The discussion below is also intended to introduce the reader to a small portion of the
vocabulary used by behavioral economists.


Classical and Behavioral Theories

According to the most recent estimates, the IRS collects about 84% of the taxes it should be collecting.
The classical economic theory of tax compliance assumes that rational individuals purposefully
compare the expected monetary costs and benefits of gaming the tax system, and that compliance can be
increased by increasing audits, increasing penalties, or a combination of the two. In contrast, behavioral
theories of tax compliance question whether people are the rational beings that the classical theory
assumes, and also propose that individuals consider the psychological or moral costs of not complying
with the tax code as well as the monetary costs. Additionally, researchers have observed that individuals
are prone to making honest mistakes when completing complex tasks, which completing a tax return may
be for some people.


An Effective Letter Campaign

Economists have found that carefully crafted letters can encourage individuals to comply with the tax
code. The tax system can be complex and difficult to understand, and individuals are susceptible to
information overload and confusion-what behavioral economists refer to as bounded rationality-
because of cognitive limits on memory, computation capacity, and the ability to process information. One
suggestion behavioralists have is the use of clear and concise writing in plain English when
communicating with taxpayers. Reader-friendly letters can reduce the cognitive load placed on everyday
taxpayers and increase the likelihood that they comply with the tax code.



                                                               Congressional Research Service
                                                               https://crsreports.congress.gov
                                                                                    IN11151

CRS INSIGHT
Prepared for Members and
Committees of Congress

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