Unrealized Gain Tax–A Coming Sea Change in FY2025 Budget Proposal?

Scope and Mechanics of the Proposal

• Several commenters clarify the proposal as: a 25% minimum tax on “total income,” including unrealized gains, for households with wealth above $100M, phasing in fully by $200M.
• Some frame it as a kind of new Alternative Minimum Tax on very high-net-worth households, not a general tax on all unrealized gains.
• Others note that this context is often omitted in media framing, causing confusion and fear among people it likely wouldn’t touch directly.

Fairness, Loopholes, and Alternatives

• Strong focus on the “buy-borrow-die” strategy: ultra-wealthy using appreciated stock as collateral for loans to fund consumption, then passing assets with stepped-up basis so gains are never taxed.
• Multiple suggestions: treat borrowing against assets as a deemed sale and repurchase; tax such loan proceeds as income; or reform step-up in basis at death.
• Some argue these targeted changes would address abuse without taxing all unrealized gains.

Slippery Slope and Threshold Concerns

• Widespread concern that thresholds (e.g., $100M) will drift downward over time via new laws or lack of inflation indexing, citing income tax history, AMT, “mansion taxes,” and sales/Social Security taxes.
• Others challenge the slippery-slope framing, arguing that tax systems evolve with needs and that some taxes haven’t massively expanded.

Economic and Behavioral Effects

• Fears of forced asset sales, market selloffs, capital flight, and pressure on small or illiquid asset holders if thresholds ever widen.
• Counterpoints: even large required asset sales by ultra-wealthy would be a small fraction of total market volume and unlikely to “end the economy.”
• Debate over whether shifting tax burden from top-end wealth to broader public increases total “stuff” produced; some emphasize demand effects and redistribution to lower-income households.

Process and Uncertainty

• One commenter asks how and when budget-linked tax changes take effect and how to track them; response notes Congress can change rates at any time with any effective date, leaving timing and predictability unclear.