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Updated December 17, 2021
Trends and Proposals for Corporate Tax Revenue

Since the mid-1960s, U.S. corporate tax revenues have
declined, relative to the size of the economy. Corporate tax
revenue as a percentage of gross domestic product (GDP),
which was 3.9% in 1965, has fallen to approximately 1.0%
in 2020. The decline in corporate tax revenue since 1965 is
due to several factors. Average tax rates have declined,
primarily due to reductions in the statutory rate and changes
in depreciation. The corporate tax base has also been
reduced through declining profitability (return on assets),
increased use of the pass-through organizational form for
businesses, and international profit shifting.
Whereas U.S. corporate tax revenue has decreased,
corporate tax revenue in other Organization for Economic
Co-operation and Development (OECD) member countries
has, on average, increased. Since 1965, average corporate
tax revenue collected by OECD countries has increased
from 2.1% of GDP to 3.1% of GDP in 2018 (see Figure 1).
Figure 1. Corporate Tax Revenue, as a Percentage of
GDP, 1965-2018
4
s          /
25
2
Source: OECD Tax on Corporate Profits, https://data.oecd.org/tax/
tax-on-corporate-profits.htm, downloaded March 31, 2021.
Note: Tax on corporate profits includes taxes levied by all levels of
government.
Figure 1 also shows that the United States collected 1.8
times as much corporate tax revenue compared to the
OECD average in 1965. Since 1981, however, U.S.
corporate tax revenue as a percentage of GDP has been less
than the OECD average (which includes the United States).
In 2018, OECD average corporate tax revenue as a
percentage of GDP was 3.1 times U.S. corporate tax
revenue as a percentage of GDP.
Corporate Tax Proposals
President Biden's budget proposes an increase in the
amount of revenue raised by the corporate tax system by
about $2 trillion over the next 10 years. Several legislative
proposals would increase corporate taxes, in most cases by
altering the international tax structure. The House-passed
Build Back Better Act (BBBA; H.R. 5376) would raise
around $800 billion in corporate taxes in FY2022-FY2031.

The Senate Finance Committee draft of the BBBA contains
similar provisions.
Raising the Corporate Tax Rate
The corporate tax rate is currently 21%, levied as a flat rate,
reduced from a top marginal rate of 35% before 2018 by the
2017 tax law commonly known as the Tax Cuts and Jobs
Act (TCJA; P.L. 115-97). President Biden has proposed an
increase to 28% with a revenue gain of $858 billion for
FY2022-FY2031. Senator Sanders has proposed (S. 991) a
graduated corporate rate with most corporate income taxed
at 35%. President Biden has also proposed an alternative
minimum tax based on financial or book income for
corporations with more than $2 billion in earnings. The
BBBA would impose a minimum tax of 15% on firms with
$1 billion or more in earnings. Senator Warren's proposal
(S. 2680) would impose a minimum tax on corporations
with over $100 million in earnings.
increasing the Minimum Tax on Foreign Source
Income (GILTI)
Several bills in the 117th Congress, including S. 20
(Klobuchar), S. 714 (Whitehouse), H.R. 1785 (Doggett), S.
991 (Sanders), and the BBBA would increase the minimum
tax on foreign source income, known as the tax on Global
Intangible Low Taxed Income or GILTI, enacted in 2017.
(See CRS Report R45186, Issues in International
Corporate Taxation: The 2017 Revision (P.L. 115-97), by
Jane G. Gravelle and Donald J. Marples for a discussion of
international tax rules.) Under current law, GILTI targets
intangible income by allowing a deemed deduction equal to
10% of tangible assets. Any remaining income is allowed a
deduction of 50% (37.5% after 2025) and then taxed at
21%, leading to a tax rate of 10.5% (13.125% after 2025).
Foreign oil extraction income is excluded and not subject to
any U.S. tax.
Current law allows credits for foreign taxes paid; the credits
are limited to U.S. taxes due on foreign-source income, but
are imposed on an overall basis across countries. This
treatment allows for the use of credited taxes paid in high-
tax countries to offset U.S. income tax due in low-tax
countries. For GILTI, the credit is limited to 80% of foreign
taxes paid.
The Biden Administration's budget and four bills in the
117th Congress-S. 20, S. 714, H.R. 1785, and S. 991-
would eliminate the deemed deduction for tangible assets
and tax GILTI at 21% (35% in S. 991). The BBBA would
reduce the deemed deduction to 5% and tax GILTI at
15.051%. In all of the proposals, the foreign tax credit
would be limited by country, and most proposals would
increase the GILTI credit to 100% (95% in the BBBA).
Foreign oil extraction income is included in GILTI in both
BBBA and the Administration proposal.

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