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                                                                                          Updated December 12, 2017
Key Issues in Tax Reform: International Tax Issues


Issues surrounding the taxation of U.S. multinational
corporations have been a major impetus for tax reform and
are some of the main arguments for tax measures to lower
the statutory corporate tax rate of 35% and revise the
current system for taxing foreign source income.

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A territorial or source-based system taxes only income
earned in the country and excludes foreign source income.
A worldwide system taxes both income earned in the
country and foreign source income, but allows a credit for
income taxes paid to foreign jurisdictions. Most countries
have largely territorial systems.

The U.S. system has elements of both. While it taxes
worldwide income, earnings of foreign subsidiaries of U.S.
multinationals are not taxed until they are repatriated (paid
as dividends to the parent). Earnings of foreign branches
and royalties and interest payments are taxed currently. A
foreign tax credit is allowed, but limited to the total U.S. tax
due. This limit is applied separately to active and passive
income. This overall limit allows cross-crediting so that
firms can use excess credits from high-tax countries to
offset U.S. tax on earnings in low-tax countries. Deferral of
tax on earnings of foreign subsidiaries and cross-crediting
introduce elements of territorial taxation, and the United
States collects relatively little foreign source income.

In common with many other countries, the United States
taxes certain easily shifted income of foreign subsidiaries
on a current basis. These rules are called CFC rules (for
controlled foreign corporations) or Subpart F rules (for the
tax code section). Subpart F income includes passive
income of subsidiaries and certain other income such as
income from sales and services subsidiaries in foreign
countries where the production and consumption takes
place in other countries. The effectiveness of Subpart F has
been reduced by check-the-box regulations that allow
payments between subsidiaries to be disregarded.


Four issues are of concern: the effect on investment abroad,
revenue losses due to profit-shifting, repatriation, and
inversion.


Broadly speaking, strong territorial elements of the U.S.
system provide an incentive to invest in countries with low
tax rates of their own and a disincentive to invest in high-
tax countries, including a disincentive to invest in the
domestic economy. According to traditional economic
analysis, world economic welfare is maximized by a system
that applies the same tax burden to prospective (marginal)
foreign and domestic investment so that taxes do not distort
investment decisions. National welfare is maximized,


however, by encouraging more investment in the United
States. (For a discussion of these principles, as well as other
international issues and details of various proposals, see
CRS Report RL34115, Reform of US. International
Taxation: Alternatives, by Jane G. Gravelle.) Some of the
arguments for lowering the U.S. statutory corporate tax
rate, which is the highest of almost all countries, relate to
the concern about domestic investment. The location of
investment, however, is driven by effective rather than
statutory tax rates; U.S. effective tax rates are more in line
with those in other countries (see CRS Report R41743,
International Corporate Tax Rate Comparisons and Policy
Implications, by Jane G. Gravelle).


Profit shifting involves the movement of profits without
real activities to countries with low tax rates, such as the
Cayman Islands and Bermuda. Considerable evidence
points to significant profit shifting by U.S. multinationals.
Profit shifting is driven by statutory tax rates.

Profit shifting primarily rests on two methods: leveraging
and transfer pricing of intangibles. Firms can shift profits
by borrowing in high-tax countries. Transfer pricing
involves the sale of intangible assets (such as drug
formulas, technological advances, and trademarks),
charging a low price to subsidiaries in low-tax countries.
Firms also use cost contribution arrangements where a low-
tax subsidiary contributes to research in the United States
for a share of the rights to the intangible.


Deferral of tax causes a tax to be triggered when foreign
subsidiaries repatriate income. When there are no foreign
tax credits to offset U.S. tax, each dollar repatriated results
in a tax at the statutory rate. Estimates indicate that firms
have around $2.5 trillion of accumulated profits offshore.
This repatriation tax could be eliminated in a system that
taxed foreign source income currently (a worldwide tax
without deferral) or a territorial tax where foreign source
income is not taxed.


Inversions occur when a U.S. firm moves its headquarters
abroad, currently by merging with a foreign firm. Mergers
where the U.S. firm maintains 80% or more ownership are
treated as U.S. firms, while 60% to 80% ownership triggers
other, less costly tax effects. Inversions grew rapidly in
2014 and 2015, but have declined somewhat in 2016
according to Commerce Department data. Some of the
decline in inversions may be due to a series of regulations
that made it more difficult to invert and limited some of the
potential benefits, such as indirect repatriations through
loans to the new parent and leveraging. (See CRS Report


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