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An Economic Perspective on Wealth Taxes

The idea of imposing a tax on individual wealth has
appeared in policy debates with increasing frequency.
Proponents of a wealth tax have primarily argued that such
a tax would achieve three objectives. First, a wealth tax
would mitigate rising wealth inequality. Second, the tax
would raise significant revenue that could be used to
address debt and deficit concerns, and fund a variety of
social policies. Finally, the tax would capture some income
sources that currently are not taxed (e.g., unrealized capital
gains or types of imputed income).
This In Focus presents an economic perspective on wealth
taxes. Because no federal wealth tax currently exists, the
discussion in this In Focus is primarily in terms of a
general wealth tax. Designing such a tax would require
careful consideration about a number of specific issues.
Where appropriate, the discussion highlights specific points
of consideration.
At its most basic level, wealth is the value of all assets (e.g.,
stocks, bonds, real estate, art) owned by an individual
minus the value of their liabilities. As shown in Figure 1,
the concentration of wealth in the top 10% (i.e., top 1% plus
next 9%) of the wealth distribution in the United States has
increased over the past 30 years. The increase has been
largest for the wealthiest households. The share owned by
the top 1% rose by the greatest amount, from 23.4% in the
third quarter of 1989 to 31.4% in the fourth quarter of 2020.
Over the same time period, the holdings of the top 1% of
the wealth distribution have shifted toward stocks and
business holdings.
Figure I. Share of Total Wealth by Wealth Percentile
Group in the United States, 1989 to 2020

Source: Board of Governors of the Federal Reserve System.
Note: Quarterly data from Q3 1989 to Q4 2020.

Updated April 1, 2022

Selected Policy Considerations
Enactment of a wealth tax would represent a significant
change in U.S. tax policy. The change would raise a
number of policy issues and questions that Congress may
choose to consider.
Revenue Yield
The Joint Committee on Taxation (JCT) would provide
Congress with an official revenue estimate of any wealth
tax proposal. A number of outside think-tank and academic
researchers have proposed revenue estimates of wealth
taxes, which vary depending on the assumed design of the
tax.
For example, the Tax Policy Center (TPC) examined three
stylized wealth taxes:
1. a tax equal to 1% of net wealth over $20
million ($40 million for joint filers);
2. a tax equal to 1% of net wealth between
$20 million and $100 million ($40
million and $200 million for joint filers)
and 2% of net wealth over $100 million;
and
3. a tax equal to 1% of net wealth between
$100 million and $1 billion and 2% of net
wealth over $1 billion.
The TPC estimates these three versions would raise $1.1
trillion, $1.6 trillion, and $800 billion in revenues,
respectively, in the first 10 years, though they emphasize
the revenue estimates are highly uncertain.
The uncertainty surrounding wealth tax revenue estimates is
illustrated by the broad range of estimates of a legislative
proposal by Senator Warren (S. 510). The proposal would
levy a 2% tax on net wealth above $50 million plus a 1%
surtax on wealth over $1 billion. Annual estimates for this
proposal range from $117 billion (Smith, Zidar, and Zwick)
to $300 billion (Saez and Zucman). The $300 billion figure
is an increase from an earlier $275 billion estimate. Saez
and Zucman partly attribute the revised estimate to an
increase in the concentration of wealth. Authors of these
estimates have noted the difficulty in determining the
magnitude of behavioral responses and avoidance behavior
that would occur if the proposal were enacted.
Valuation
Determining the value of assets is a crucial aspect of
implementing a wealth tax. Valuations of bank accounts
and assets that are readily traded on financial markets, such
as stocks and bonds, would be relatively straightforward,
although when such valuations were made would be
important given fluctuations in asset values over time.

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