Unrealized Capital Gains Tax: the Law vs the Lobbying

The IRS does not tax a single dollar of unrealized gains under current law. Yet a single Biden-era proposal and one Supreme Court decision that deliberately left the question open have made the concept a live concern among wealth-preservation-minded investors. As of May 2026, the policy environment has moved in the opposite direction, with the Trump administration pursuing capital gains tax cuts rather than expansion. The constitutional question left unresolved by Moore v. United States (2024) and active state-level developments, however, keep the unrealized capital gains tax on the analytical agenda for long-term investors and financial planners. What follows maps the specific mechanics of such a tax, where the legal and legislative lines currently sit, how a parallel historical risk has resurfaced in investment commentary, and what strategies are being examined in response.

What an unrealized capital gains tax would actually do to private wealth

Under current U.S. tax law, gains exist on paper until a sale triggers a taxable event. This is the realisation principle, and it is foundational. IRS Topic 409 and Publication 544 (updated 2025) confirm that unrealized appreciation is not subject to capital gains liability until the asset is sold or otherwise disposed of.

IRS Publication 544 confirms that unrealized gains are not currently taxable. Capital gains tax liability arises only upon realisation, typically through a sale or exchange of the appreciated asset.

The Biden administration’s proposed Billionaire Minimum Income Tax (BMIT) would have removed that deferral for individuals with net worth exceeding $100 million, imposing a 25% minimum tax on unrealized gains across stocks, bonds, and real estate. Exclusions were debated for primary residences and qualified small business stock. The proposal was never enacted.

The distinction from a wealth tax matters. A wealth tax assesses total net worth. An unrealized gains tax targets the annual change in asset values, creating a specific mechanism: as fiat-driven nominal prices rise, annual tax bills on paper gains force asset sales to cover liabilities. That compulsory divestiture cycle is the damage pathway.

The asymmetry across asset types is pronounced. Liquid securities, with observable daily prices, are far more exposed to an annual mark-to-market regime than illiquid holdings.

• Current law (realisation principle): Gains are taxed only when an asset is sold; paper appreciation carries no tax liability
• Proposed mark-to-market taxation: Gains would be assessed annually regardless of sale, creating tax liability on unrealized appreciation

The valuation problem that makes implementation contested

Annual taxation of illiquid assets creates a persistent dispute: what is a private business interest, a real estate partnership, or a piece of art worth on any given assessment date? No readily observable annual price exists for these holdings.

Every legislative proposal in this space has struggled to define a workable methodology. The IRS and taxpayers would face recurring disagreements over fair market value, and the administrative burden of resolving those disputes at scale remains one of the primary practical obstacles to implementation.

Where the law actually stands in May 2026

No federal unrealized capital gains tax exists. The current administration’s direction is explicitly toward cuts, not expansion. The 119th Congress is debating capital gains indexing for inflation and rate reductions, not new taxation mechanisms.

The constitutional picture is less settled. In Moore v. United States (2024), the Supreme Court upheld a specific repatriation tax but ruled narrowly.

The Court in Moore v. United States explicitly declined to resolve the broader question of whether taxing unrealized gains is constitutionally permissible under the Sixteenth Amendment. That question remains legally undecided as of May 2026.

The Biden-era BMIT was proposed but never passed by Congress. It does not represent current law.

At the state level, the landscape is moving in both directions simultaneously. The table below maps the divergence.

The gap between the policy conversation and the actual legal landscape is wide. The Committee for Responsible Federal Budget has estimated that the administration’s proposed cuts could add approximately $1 trillion to the national debt, a fiscal reality that could revive revenue-expansion proposals under a future administration. Investors who mistake advocacy commentary for enacted law risk misallocating protective strategies.

How currency debasement links paper gains to compelled asset disposal

The analytical thread linking unrealized gains taxation and physical asset seizure is currency debasement. When fiat-driven nominal prices inflate asset values, an unrealized gains tax converts that inflation into a tax liability, even when no real wealth has been created.

The forced-sale cycle operates in three steps: 1. Nominal asset prices rise due to fiat currency debasement 2. Tax liability emerges on the paper gain, regardless of whether the asset has been sold 3. The holder must sell a portion of the asset to cover the liability, reducing real holdings

This mechanism operates without any deliberate confiscation intent. The erosion occurs through the tax code rather than executive order. The Biden-era BMIT, had it been enacted, would have been the concrete policy expression of this cycle for individuals with net worth exceeding $100 million.

The Dow-to-gold ratio illustrates the gap between nominal and real performance. At the time of recent source commentary, the ratio stood near 6-6.5, down from a 1999 peak of approximately 45. Measured in gold ounces rather than dollars, equity performance over the past quarter-century looks materially different.

A countervailing force exists. Proposals to index capital gains for inflation, currently under discussion in the 119th Congress, would partially offset this dynamic:

• Inflation indexing would reduce taxes on purely inflationary gains, narrowing the forced-sale mechanism
• Current legislative discussions include this as part of broader capital gains reform
• If enacted, it would function as a structural limiter on the fiat-debasement-driven tax burden

The connection between currency debasement and nominal-gains taxation is why finance-minded investors treat these as related risks rather than two separate policy debates.

Inflation-linked positioning, including allocations to Treasury Inflation-Protected Securities, real assets, and physical gold, represents the category of tools most directly responsive to the fiat-debasement-driven nominal gains risk the BMIT would have accelerated, because each of those instruments is designed to hold real value when currency purchasing power declines.

Executive Order 6102 and the legal anatomy of the 1933 gold requisition

Executive Order 6102, signed in April 1933, required most U.S. citizens to deliver gold coins, bullion, and certificates to the Federal Reserve at $20.67 per troy ounce. The legal authority came from the Trading with the Enemy Act of 1917, as amended by the Emergency Banking Act of 1933. Exemptions covered jewellery, dental use, industrial and artistic use, and coin collections up to $100 face value.

Private gold ownership remained banned from 1933 until 1 January 1975, when President Ford restored the right. Today, gold is legal to own in all forms and is classified by the IRS as a collectible, subject to a 28% maximum long-term capital gains rate, compared with 20% for most other assets.

Central bank gold accumulation at the sovereign level reflects the same systemic motivation that made private gold reserves strategically significant in 1933: institutional actors are repositioning physical gold as a monetary hedge outside the fiat system, a behaviour pattern that underpins the current elevated price environment.

The gold standard context was structurally necessary to the 1933 order. The government needed private gold reserves to manage monetary policy under a system where the currency was convertible to gold. That structural dependency has no equivalent under the current fiat system.

Four factors that determine whether confiscation risk is real or theoretical

The following framework isolates the conditions that would need to be present for a comparable action today:

1. Monetary system dependency: In 1933, the gold standard made private gold reserves a matter of monetary policy. The current fiat system removes that systemic motivation entirely.
2. Legal authority required: Any future confiscation would require new legislative authority or novel application of emergency powers statutes that have evolved significantly since 1933.
3. Political feasibility: No current administration or legislative faction has proposed restricting private gold ownership.
4. Compensation obligations: The Fifth Amendment’s Takings Clause would require just compensation at current market prices, raising the fiscal and political cost far above the 1933 precedent.

The 1933 precedent is real, but its conditions were structurally specific. The fiat monetary structure removes the primary systemic motivation that existed at the time.

What investors are doing: legal strategies across physical assets and jurisdictions

Three documented strategies have emerged in response to these interconnected risks, each addressing a different dimension of the exposure.

The physical asset conversion strategy involves reframing bullion holdings into functional or decorative forms, such as jewellery, dishware, or sculpture, to fall under exemption categories that existed in 1933 and could recur in any future policy action. The logic is specific to confiscation risk rather than taxation risk.

Domestic jurisdictional planning leverages the divergence between states. Relocating to Missouri or Texas, where legislative bans on unrealized gains taxes are in place, addresses state-level exposure. It does not resolve federal-level risk.

A common misconception involves IRS Section 475, which permits a mark-to-market election for active traders. This is a narrow provision related to loss deductions and is unrelated to the broader wealth taxation proposals.

The U.S. citizenship complication in international diversification

U.S. citizens owe federal taxes on worldwide income regardless of residence. Geographic relocation alone does not eliminate federal tax exposure; it is a partial solution rather than a complete one.

For those considering renunciation, the exit tax under IRC Section 877A applies to expatriating high-net-worth individuals. The strategic timing dimension is relevant: if exit tax regimes become more restrictive under future legislation, the window for tax-efficient expatriation could narrow. Each strategy carries distinct legal complexity and cost, and understanding which specific mechanism each addresses prevents investors from applying the wrong tool to their particular risk profile.

Investors exploring the mechanics of reducing appreciated positions without triggering avoidable tax events will find our full explainer on tax-efficient rebalancing execution, which covers the sequencing logic for new contributions, dividend redirection, tax-advantaged account sales, and taxable account liquidation, along with alternative capital destinations including private credit and market-neutral strategies.

The policy trajectory worth watching and what would change the calculus

Three observable developments would most significantly shift the risk calculation, ordered by near-term probability:

1. California’s 2026 ballot result: Initiative 25-0024 proposes a 5% one-time tax on net worth exceeding $1 billion. While structured as a net worth tax rather than a pure unrealized gains levy, its passage or defeat would signal the political viability of wealth-based taxation at the state level.
2. A Supreme Court case directly testing unrealized gains constitutionality: Moore v. United States left this question explicitly open. Acceptance of a case that squarely addresses whether the Sixteenth Amendment permits taxation of unrealized appreciation would be the most consequential legal development in this space.
3. A federal administration shift that revives BMIT-style proposals: The current direction is toward cuts and indexing, but fiscal pressure could change the political calculus.

The Committee for Responsible Federal Budget has estimated that the current administration’s proposed capital gains tax cuts could add approximately $1 trillion to the national debt, creating fiscal conditions that could revive revenue-expansion proposals under a future administration.

The current policy direction reduces near-term federal risk. It does not resolve the constitutional ambiguity that Moore left open, and it does not prevent state-level experimentation from proceeding independently.

The evidence demands proportionality, not complacency

The unrealized capital gains tax risk is real as a policy concept. Constitutional ambiguity persists, and state-level experimentation is active. It is not, however, enacted federal law, and the current legislative direction is away from it.

The two risk mechanisms examined here, fiat-driven nominal gains taxation and physical asset seizure, share a common analytical thread rooted in currency debasement. Each requires a distinct legal and practical response. Conflating them or treating either as imminent without monitoring the specific signals leads to misallocated protective strategies.

The actionable monitoring framework is specific: track the California 2026 ballot initiative result and any future Supreme Court acceptance of a case directly testing unrealized gains constitutionality. These are the two nearest-term signals that would warrant recalibrating portfolio positioning.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. These statements regarding future legislative or judicial outcomes are speculative and subject to change based on political developments, market conditions, and legal proceedings.