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1 1 (September 27, 2017)

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                                                                                      Updated September 27, 2017
Key Issues in Tax Reform: The Business Interest Deduction and

Capital Expensing


Two policy changes that have appeared in the recent tax
reform discussions are (1) disallowing business deductions
of interest payments and (2) allowing expensing of capital
investments. While the discussions are typically framed in
terms of trading one policy for the other policy, the analysis
presented here attempts to separate the two options where
possible, given that each policy change could be enacted
independent of the other.


Currently, businesses are generally allowed to deduct
interest costs incurred when borrowing money to finance
business activities. The rules and limitations for the
deduction are detailed in Section 163 of the Internal
Revenue Code (IRC). Business interest has been deductible
since the enactment of the modern federal income tax code
in 1913. The deduction is consistent with traditional
theories of income taxation which call for the deduction of
expenses incurred in the generation of income.

Businesses are also allowed to claim a deduction for the
cost of their investments in physical assets wearing out (i.e.,
depreciating). Like the interest deduction, the depreciation
deduction is a feature of an income tax and has been
available in some form since the enactment of the modem
tax code. The general idea is that since physical assets
generate income over time, the deduction of their cost
should be spread out over time to match the generation of
income. The Modified Accelerated Cost Recovery System
(MACRS) has been used to depreciate most investments
made after 1986. The intricacies of MACRS and the
exceptions to it are governed by various sections of the tax
code (e.g., Sections 167, 168, 179, etc.).

The current depreciation system can be understood along
two dimensions. The first dimension is the length (or life)
over which a business may depreciate an asset. Most
equipment is depreciated over 5 to 7 years, although some
may be depreciated over as short as 3 years or as long as 20
years. Residential buildings are depreciated over 27.5 years,
while commercial buildings are depreciated over 39 years.
Land may not be depreciated.

The second dimension is the method used to determine how
much depreciation can be deducted each year. Under
MACRS, the simplest method is the straight-line method
which allows for equal amounts to be deducted each year
over the relevant life of an asset. For example, under the
straight-line method if a machine costs $1 million and has a
depreciable life of 10 years, a business would be permitted
to deduct $100,000 from its income each year for 10 years.


More complicated methods exist under the declining-
balance approach which allows for larger depreciation
deductions in the earlier years of an asset's life. Because
assets are deprecated more quickly under the declining-
balance method, this approach is often referred to as
accelerated depreciation.

The tax code provides two exceptions to MACRS known as
179 expensing and bonus depreciation. These
exceptions allow for more generous capital cost recovery.
For more information, see CRS Report R43432, Bonus
Depreciation: Economic and Budgetary Issues, by Jane G.
Gravelle; and CRS Report RL31852, The Section 179 and
Bonus Depreciation Expensing Allowances: Current Law
and Issues for the 1 1 4th Congress, by Gary Guenther.


The Unified Framework for Fixing Our Broken Tax Code,
issued by the Office of the Speaker on September 27, 2017,
would allow businesses to expense new investments made
within at least the next five years. Structures would not be
eligible for expensing. The Unified Framework also states
that the deduction for net interest would be partially
limited for C corporations, and that consideration would
be given to the appropriate treatment for non-corporate
businesses.

The House Better Way tax reform blueprint proposed
prohibiting businesses from deducting net interest while
simultaneously allowing them to expense the cost of
investments in the year capital is purchased. Not allowing a
deduction for interest while allowing full expensing is a
fundamental feature of a business cash-flow tax, but not an
income tax. Interest expenses could offset interest income,
but could not offset non-interest income.

In the 11 3th Congress, former Ways and Means Chairman
Dave Camp's Tax Reform Act of 2014 (H.R. 1) would have
allowed businesses to continue to deduct interest, but would
have slowed depreciation for most businesses by extending
the time period over which the deductions were claimed
and requiring the use of the straight-line method. Small
businesses, however, would have been eligible for more
generous depreciation than is allowed under the current
system.




Disallowing the deduction for net interest and allowing
businesses to expense their investments would have
opposing revenue effects. The Joint Committee on Taxation


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