H.R. 5427 (119th)Bill Overview

Billionaires Income Tax Act

Taxation|Taxation
Cosponsors
Support
Democratic
Introduced
Sep 17, 2025
Discussions
Bill Text
Current stageCommittee

Referred to the House Committee on Ways and Means.

Introduced
Committee
Floor
President
Law
Congressional Activities
01 · The brief
Plain-English summaryWhat this bill actually does

The bill, titled the Billionaires Income Tax Act, amends the Internal Revenue Code to require certain very high‑income or very high‑asset taxpayers (“applicable taxpayers”) to recognize and pay tax annually on appreciation of covered assets (mark‑to‑market treatment for tradable assets and deemed realization for many transfers of nontradable assets). It defines thresholds for applicable taxpayers (e.g., $100 million adjusted gross income or $1 billion in assets over prior years), imposes a deferral recapture interest charge on previously deferred gains, and eliminates or limits a range of preferential rules for these taxpayers (including step‑up at death, certain like‑kind and §351 nonrecognition transactions, QSBS exclusion, and some Opportunity Zone benefits).

Why people may split

Scope and method of taxation: liberal and centrist accept mark‑to‑market/deemed realization for very wealthy as fairness; conservative rejects taxation of unrealized gains as overreach.

Watch point

Relative to its intended legislative type, this bill is a detailed substantive tax reform measure that specifies new tax concepts, concrete calculations, thresholds, reporting duties, and amendments across the Internal Revenue Code; it embeds many anti‑avoidance and coordination rules and delegates substantial implementation detail to Treasury rulemaking.

The bill, titled the Billionaires Income Tax Act, amends the Internal Revenue Code to require certain very high‑income or very high‑asset taxpayers (“applicable taxpayers”) to recognize and pay tax annually on appreciation of covered assets (mark‑to‑market treatment for tradable assets and deemed realization for many transfers of nontradable assets).

It defines thresholds for applicable taxpayers (e.g., $100 million adjusted gross income or $1 billion in assets over prior years), imposes a deferral recapture interest charge on previously deferred gains, and eliminates or limits a range of preferential rules for these taxpayers (including step‑up at death, certain like‑kind and §351 nonrecognition transactions, QSBS exclusion, and some Opportunity Zone benefits).

The bill also tightens treatment of deferred compensation and private placement life insurance for applicable taxpayers, expands reporting requirements, and includes special rules for applicable entities, trusts, expatriates, and foreign trusts.

Passage18/100

Judged only by the text and typical legislative dynamics, this is a large, technically complex, high‑impact tax rewrite aimed at a politically salient population. That combination usually faces strong organized opposition (financial industry, wealthy taxpayers, some business groups), legal and administrative questions, and difficulty gaining the broad consensus required in the Senate for controversial tax legislation. While aspects could be negotiated or parceled into narrower, more bipartisan technical changes, the bill in its current sweeping form is unlikely to become law without significant modification, compromise, or packaging into a larger legislative vehicle that balances interests.

CredibilityPartially aligned

Relative to its intended legislative type, this bill is a detailed substantive tax reform measure that specifies new tax concepts, concrete calculations, thresholds, reporting duties, and amendments across the Internal Revenue Code; it embeds many anti‑avoidance and coordination rules and delegates substantial implementation detail to Treasury rulemaking.

Contention75/100

Scope and method of taxation: liberal and centrist accept mark‑to‑market/deemed realization for very wealthy as fairness; conservative rejects taxation of unrealized gains as overreach.

02 · What it does

Who stands to gain, and who may push back.

Likely benefits vs burdens50% / 50%
Federal agenciesTaxpayers · States

These are examples from the analysis, not a ranked list of the most-affected groups.

Likely helped
  • Federal agenciesLikely to increase federal revenue by taxing unrealized gains of very wealthy individuals and entities and reducing 'bu…
  • Potential benefitReduces opportunities for indefinite tax deferral and sheltering through trusts, private placement contracts, and some…
  • Potential benefitCreates demand for expanded tax compliance, valuation, and reporting work (accountants, tax lawyers, valuation speciali…
Likely burdened
  • TaxpayersRaises compliance costs and administrative burden for affected taxpayers and for the IRS because annual unrealized‑gain…
  • StatesCould create liquidity pressures or force sales of illiquid assets (private company stock, real estate, private equity…
  • Local governmentsMay reduce incentives for certain investment vehicles targeted at economic development (qualified opportunity funds) an…
03 · Why people split

Why the argument around this bill splits.

Scope and method of taxation: liberal and centrist accept mark‑to‑market/deemed realization for very wealthy as fairness; conservative rejects taxation of unrealized gains as overreach.
Progressive85%

A mainstream progressive would view this bill as a targeted, equity‑oriented reform that closes long-standing loopholes allowing the ultra‑wealthy to defer or avoid tax on investment gains.

They would see the mark‑to‑market and deemed‑realization rules, the step‑up repeal, and limits on other preferential treatments as restoring parity between wage earners and billionaires.

They would expect meaningful additional revenue and a reduction in tax‑driven wealth accumulation across generations.

Leans supportive
Centrist55%

A pragmatic moderate would acknowledge the intent to tax very large unrealized gains and close egregious avoidance, but would be concerned about complexity, cash‑flow effects, and unintended consequences for real businesses and capital formation.

They would want to weigh projected revenue against administrative costs, compliance burdens, and potential impacts on investment, and would press for careful phase‑in and clear Treasury guidance.

Overall they would view the bill as potentially useful but requiring refinements to reduce economic disruption and legal uncertainty.

Split reaction
Conservative10%

A mainstream conservative would view the bill as a large expansion of federal tax reach and administrative power that taxes unrealized gains and penalizes wealth creation.

They would see mark‑to‑market and deemed realization as a radical change that risks driving investment, entrepreneurs, and capital overseas, raising compliance costs and stifling economic growth.

They would likely oppose the bill unless substantially narrowed or replaced by reforms that preserve realization as the tax event and protect capital formation.

Likely resistant
04 · Can it pass?

The path through Congress.

Introduced

Reached or meaningfully advanced

Committee

Reached or meaningfully advanced

Floor

Still ahead

President

Still ahead

Law

Still ahead

Passage likelihood18/100

Judged only by the text and typical legislative dynamics, this is a large, technically complex, high‑impact tax rewrite aimed at a politically salient population. That combination usually faces strong organized opposition (financial industry, wealthy taxpayers, some business groups), legal and administrative questions, and difficulty gaining the broad consensus required in the Senate for controversial tax legislation. While aspects could be negotiated or parceled into narrower, more bipartisan technical changes, the bill in its current sweeping form is unlikely to become law without significant modification, compromise, or packaging into a larger legislative vehicle that balances interests.

Scope and complexity
86%
Scopesweeping
86%
Complexityhigh
Why this could stall
  • No official Congressional Budget Office (CBO) or Joint Committee on Taxation (JCT) revenue/cost estimate is included in the text — the magnitude and distribution of fiscal effects are therefore unknown and would materially affect legislative support.
  • The bill relies heavily on Secretarial authority for many definitions, valuation rules, and anti‑avoidance regulations; how those delegated powers would be exercised (and legal challenges to them) is uncertain and could alter implementation and political acceptability.
05 · Recent votes

Recent votes on the bill.

No vote history yet

The bill has not accumulated any surfaced votes yet.

06 · Go deeper

Go deeper than the headline read.

Included on this page

Scope and method of taxation: liberal and centrist accept mark‑to‑market/deemed realization for very wealthy as fairness; conservative reje…

Judged only by the text and typical legislative dynamics, this is a large, technically complex, high‑impact tax rewrite aimed at a politica…

Unlocked analysis

Relative to its intended legislative type, this bill is a detailed substantive tax reform measure that specifies new tax concepts, concrete calculations, thresholds, reporting duties, and amendments across the Internal…

Go beyond the headline summary with full stakeholder mapping, legislative design analysis, passage barriers, and lens-by-lens tradeoff breakdowns.

Perspective breakdownsPassage barriersLegislative design reviewStakeholder impact map
Open full analysis