Read twice and referred to the Committee on Finance.
Congressional Research Service
Official summary
Version 00 · Introduced in Senate · Mar 1, 2021
Ultra-Millionaire Tax Act of 2021
This bill imposes a tax on the net value of all taxable assets of the taxpayer on the last day of any calendar year (wealth tax). The amount of such tax shall be equal to the sum of 2% of the amount of taxpayer assets exceeding $50 million but not in excess of $1 billion, plus the applicable percentage (3% or 6% if certain legislation is in effect) of the net value of such taxable assets exceeding $1 billion. There is no tax on the net value of taxable assets not in excess of $50 million.
The bill defines net value of all taxable assets as the value of all property of the taxpayer, real or personal, tangible or intangible, wherever situated reduced by any debts (including secured debts) owed by the taxpayer. The definition excludes property with a value of $50,000 or less, tangible personal property, certain property used in a trade or business, and collectibles.
Showing the opening paragraphs of the official summary.
Read full official summaryShow less
The Internal Revenue Service (IRS) must audit annually not less than 30% of taxpayers required to pay the tax imposed by this bill.
The bill provides funding to the IRS for FY2022-FY2032 for enforcement of the requirements of this bill, taxpayer services, and for business system modernization.
Source last updated: Dec 5, 2025. Consult Congress.gov for the current record.
AI Conversation Starters
Explore the bill from different angles
Choose a perspective, copy a prompt, and paste it into your preferred AI. Each prompt includes the bill version and available official source links, and asks for counterarguments as well as supporting evidence.
Neutral evidence review
Objective
Analyze S.510 as objectively as possible. Explain its main provisions, who would be affected, possible benefits and harms, implementation, exceptions, and uncertainties. Present the strongest arguments for and against it, and identify evidence needed to assess its public impact.
View full prompt & sources
Fairness and public impact
Progressive lens
Examine S.510 through a progressive lens, focusing on fairness, access, economic inequality, and effects on vulnerable communities. Explain potential benefits, costs, and unintended consequences. Consider the strongest counterarguments and distinguish stated goals from demonstrated outcomes.
View full prompt & sources
Institutions and government scope
Conservative lens
Examine S.510 through a conservative lens, focusing on fiscal responsibility, institutional stability, federalism, and the scope of government. Explain potential benefits, costs, and unintended consequences. Consider the strongest counterarguments and any provisions that challenge this perspective.
View full prompt & sources
Individual rights and government power
Liberty lens
Examine S.510 through a civil-liberties and limited-government lens. Consider individual rights, privacy, voluntary choice, accountability, and government power. Explain tradeoffs, possible safeguards, and the strongest counterarguments without assuming the proposal is beneficial or harmful.