Taxes

Taxing Unrealized Gains: What It Is and Why It Matters

By
Alexander Harmsen
Alexander Harmsen is the Co-founder and CEO of PortfolioPilot. With a track record of building AI-driven products that have scaled globally, he brings deep expertise in finance, technology, and strategy to create content that is both data-driven and actionable.
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PortfolioPilot Compliance Team
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Taxing Unrealized Gains: What It Is and Why It Matters

Let’s be honest, taxes can feel like a maze sometimes. And when you hear a term like “unrealized gains,” it’s easy to think, “Oh no, more confusing stuff to deal with!” But don’t worry, we’ve got your back. By the time you finish this article, you’ll understand what taxing unrealized gains means, why it’s such a hot topic, and how it might affect you. Let’s break it down together.

Key Takeaways

  • Unrealized gains are the increase in value of something you own, like stocks or property, that you haven’t sold yet.
  • Taxing unrealized gains would mean paying taxes on that growth even if you haven’t cashed in on it.
  • The idea is meant to address wealth inequality, but it’s raising lots of questions about fairness and practicality.
  • Knowing this concept is crucial, especially if you invest or follow tax policy changes.

What Are Unrealized Gains?

Let’s start with the basics: Unrealized gains happen when something you own—say, a stock or a house—goes up in value, but you haven’t sold it yet. It’s like seeing your home’s value increase on Zillow; you know it’s worth more, but you haven’t pocketed the cash.

Hypothetical Example

Picture this: You buy stock in a company for $1,000. A year later, it’s worth $1,500. That’s a $500 unrealized gain because you haven’t sold it yet. It’s just numbers on paper (or your app).

Currently, under U.S. tax rules, you don’t owe taxes on that $500 unless you sell the stock. At that point, it becomes a realized gain, and you pay taxes on it. Easy enough, right?

What Does It Mean to Tax Unrealized Gains?

Now here’s where things get tricky: Taxing unrealized gains means you’d owe taxes on that $500 gain even if you didn’t sell your stock. Yep, you’d be paying taxes on paper gains. It’s a big shift from how things work now.

Hypothetical Scenario

Let’s go back to your $500 gain. Imagine the government says, “We’re taxing unrealized gains.” At the end of the year, you might owe taxes on that $500 even though you didn’t sell the stock and don’t have extra cash from it.

Why Is This Being Discussed?

The idea of taxing unrealized gains is being floated as a way to reduce income inequality. In the U.S., the top 1% of earners hold over 30% of the nation’s wealth, much of it in investments. Recent proposals, such as those targeting billionaires, suggest taxing the yearly growth of their investments even if they haven’t sold any assets, which could generate an estimated $360 billion annually for public programs, according to some analysts. Here’s the thinking:

  • Wealth Concentration: The wealthiest Americans often make most of their money from investments. By holding onto assets, they can avoid taxes for years.
  • Revenue Potential: Taxing unrealized gains could generate billions of dollars for government programs.

But it’s not without controversy. Critics argue:

  • It could be unfair to people who have valuable assets but no cash to pay the taxes.
  • Some assets, like real estate or art, are tough to value annually. For instance, a unique painting might have wildly different appraisals depending on market trends or the appraiser’s opinion. Similarly, real estate valuations can fluctuate due to location demand, zoning changes, or local market conditions. These variations make it difficult to establish a consistent yearly value, adding complexity to implementing such a tax.
  • It might cause investors to sell off assets earlier than planned, shaking up the markets.

Practical Challenges of Taxing Unrealized Gains

It might sound simple in theory, but in practice, taxing unrealized gains comes with some big hurdles:

Asset Valuation

Not everything has an obvious price tag. Stocks are easy to value because they have a market price. But what about a private business or a rare painting? Figuring out their value each year could be a headache.

Liquidity Issues

Imagine owning a house that goes up in value, but you don’t have any cash to pay the taxes on that increase. You might be forced to sell the house just to cover your tax bill. Not ideal.

Market Impact

If investors know they’ll face yearly taxes on gains, they might sell assets sooner or make riskier moves to offset the costs. This could lead to more volatility in the financial markets.

Real-Life Consequences 

One recent proposal focused on taxing billionaires’ unrealized gains. For instance, if a billionaire’s stock portfolio grew by $1 billion in a year, they could owe taxes on that amount even if they didn’t sell anything (White House, 2022).

While this might seem like a way to target the ultra-wealthy, it’s sparked debates about whether it’s fair or practical. For smaller investors, such rules could have unintended consequences, like new tax burdens on retirement accounts or property investments. Middle-income families saving for a child’s college education, for example, might face taxes on the growth of a 529 plan’s investments even if they haven’t used the funds yet. Similarly, someone relying on a rental property as a source of income might see higher tax obligations if the property value increases, potentially straining their cash flow (US Funds, 2022). 

Pros and Cons of Taxing Unrealized Gains

Pros Cons
Could reduce wealth inequality May create liquidity challenges for asset-rich individuals
Generates additional tax revenue Difficult to value certain assets annually
Encourages more equitable contributions to society Could lead to unintended market consequences

How to Prepare for Possible Changes

If you’re an investor, here are some steps to help you stay ahead of the game:

  1. Track Asset Values: Keep an eye on how much your investments are worth. If these taxes come into play, this info will be critical.
  2. Diversify Your Portfolio: A mix of assets—some liquid (like cash) and some less so (like property)—can help you manage potential tax hits.
  3. Talk to a Tax Pro: Seriously, don’t go it alone. A professional can help you navigate any changes and make smart decisions.

Realized vs. Unrealized Gains & Taxation — FAQs

What is the main difference between realized and unrealized gains under current U.S. tax rules?
Unrealized gains are increases in asset value before sale and aren’t taxed. Realized gains occur when the asset is sold, triggering capital gains taxes on the profit.
How long can a charge-off remain visible on a credit report?
A charge-off stays on a credit report for up to seven years from the first missed payment, affecting borrowing ability during that time.
How much wealth is held by the top 1% of U.S. earners, often cited in debates on taxing unrealized gains?
The top 1% of Americans hold over 30% of national wealth, much of it tied to investments that may avoid taxation until sold.
What revenue potential has been estimated for taxing billionaires’ unrealized gains?
Analysts estimate taxing unrealized gains among billionaires could raise about $360 billion annually, creating significant new funding for public programs.
How would taxing unrealized gains affect someone with a $500 stock gain they haven’t sold?
Under such a policy, the investor could owe taxes on the $500 gain at year-end, despite not having liquidated the stock for cash.
What makes valuing assets like real estate or art challenging for unrealized gains taxation?
Unlike publicly traded stocks, assets such as real estate or art lack clear daily pricing. Valuations depend on market conditions and appraisers, often producing inconsistent results.
Why do liquidity issues matter if unrealized gains are taxed?
If an asset like a home increases in value but produces no cash, an investor might need to sell it simply to cover the tax bill on paper gains.
How could taxing unrealized gains change investor behavior in markets?
Investors might sell assets earlier than planned or adopt riskier strategies to offset yearly tax bills, potentially increasing market volatility.
In the example given, how would a billionaire’s portfolio growth be taxed under recent proposals?
If a billionaire’s stock portfolio rose by $1 billion in a year, they could owe taxes on that $1 billion increase even without selling shares.
What potential impact could taxing unrealized gains have on retirement savings plans like 529s?
If applied broadly, such taxation could create new burdens by taxing growth in accounts like 529 college savings plans before funds are withdrawn.

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1: As of February 20, 2025