Realized vs. Unrealized Gains: Tax Rules Explained
A realized gain is profit you lock in the moment you sell an asset for more than you paid, and it's taxable that year, while an unrealized gain is a paper profit on an asset you still own that the IRS does not tax until you sell.
Realized Gains vs Unrealized Gains: Side-by-Side
| Realized Gains | Unrealized Gains | |
|---|---|---|
| Definition | Profit locked in after you sell | Paper profit on an asset you still hold |
| Taxed today? | Yes, in the year you sell | No — untaxed until sold |
| Tax rate (held ≤1 year) | Ordinary income rates (up to 37%) | Not applicable |
| Tax rate (held >1 year) | 0%, 15%, or 20% long-term rate | Not applicable |
| Tax form | Form 8949 and Schedule D | None required (most investors) |
| Can it disappear at death? | No — already taxed when sold | Yes, via step-up in basis for heirs |
| Affects net worth today? | Converts asset to cash | Yes, on paper, but value can still fall |
Which should you choose?
Realized vs unrealized gains comes down to one trigger: the sale. Hold an asset and the gain stays unrealized and untaxed, no matter how large it grows on paper.
Sell it and the gain becomes realized and taxable that year, at ordinary rates if you've held it a year or less and at the lower long-term rate if you've held it longer. The single biggest lever most investors control is timing that sale to cross the one-year mark — as the worked example below shows, waiting three weeks can cut a tax bill by thousands of dollars.
What is a realized gain?
A realized gain happens when you sell an asset for more than you paid for it. The profit becomes real cash (or trade proceeds) the moment the sale closes. Until that sale, any increase in value is just a number on a screen.
Say you bought 100 shares of a stock at $50 each, for a $5,000 cost basis. If you sell all 100 shares at $80, you realize a $3,000 gain. That $3,000 is now taxable income for the year you sold.
Realized gains apply to stocks, real estate, crypto, and most other investments. The IRS only cares about the sale date and the difference between your sale price and your cost basis.
What is an unrealized gain?
An unrealized gain is the increase in value of an asset you still own. It exists only on paper until you sell. Financial apps often call this your "gain/loss" column, and it changes every day the market moves.
If that same stock position climbs from $5,000 to $8,000 while you keep holding it, you have a $3,000 unrealized gain. You haven't collected a dollar of it yet, and you could lose it just as easily if the price drops back down.
Unrealized gains matter for tracking your net worth, but they carry zero tax consequence on their own. The net worth calculator can help you track how much of your total wealth sits in unrealized gains versus cash you've already banked.
Tax rules: why unrealized gains aren't taxed
The United States taxes investment gains on a realization basis, not a mark-to-market basis, for nearly all individual investors. That means the IRS waits for a sale before it counts the profit as income. You can watch a stock triple in value and owe nothing, as long as you keep holding it.
The narrow exception is a mark-to-market election available to investors who qualify as professional traders under IRS rules. That election forces year-end gains to be taxed as if everything sold, but it's rare and applies only to full-time trading businesses, not typical buy-and-hold investors. See the IRS guide to capital gains and losses for the general realization rule.
Realized gains, by contrast, are always taxed the year the sale happens. The rate you pay depends entirely on how long you held the asset before selling it.
Short-term vs. long-term: the holding period that changes your tax bill
Hold an asset for one year or less before selling and any gain counts as short-term. Short-term gains get taxed as ordinary income, stacked on top of your salary, at rates up to 37% depending on your bracket.
Hold the same asset for more than one year and the gain becomes long-term. Long-term gains get taxed at 0%, 15%, or 20% for 2026, depending on your total taxable income. For most middle-income earners, that rate lands at 15% — often less than half the short-term rate.
Here's the real-money version. Say you hold a stock position worth $50,000 with a $20,000 unrealized gain, and you're three weeks away from hitting the one-year mark. Sell today and that $20,000 gain is short-term, taxed in the 24% bracket, so you owe $4,800 in federal tax. Wait three weeks and the same $20,000 gain becomes long-term, taxed at 15%, so you owe $3,000. Waiting three weeks saves you $1,800 in taxes on this one sale alone, with zero change to the underlying investment. Model your own position and holding period in the investing calculator before you decide when to sell.
How to report each on your taxes
Realized gains get reported on Form 8949, where you list each sale, the date bought, the date sold, your cost basis, and the proceeds. Those totals then flow to Schedule D, which summarizes your net short-term and long-term gains for the year. Most brokerages send you a 1099-B with these numbers already filled in.
Unrealized gains require no reporting at all for typical investors. You don't list them anywhere on your tax return, because the IRS hasn't taxed them yet. The only exception is the rare mark-to-market trader election described above, which forces reporting of unrealized positions as if sold at year-end.
This is a common point of confusion: a brokerage statement showing a $20,000 unrealized gain is not a tax document. Nothing is owed, and nothing is reported, until you actually sell.
Tax planning tips for investors
Tax-loss harvesting pairs realized losses against realized gains to shrink your taxable income. If you sell one position at a $5,000 loss the same year you realize a $5,000 gain elsewhere, the two cancel out and you owe nothing on that gain.
Holding period timing is the simplest lever you control directly. Checking your purchase date before you sell, and waiting out the last few weeks to cross the one-year mark, routinely cuts a tax bill by thousands of dollars, as shown in the worked example above.
The step-up in basis at death is the most powerful unrealized-gain strategy of all. When an investor dies still holding an appreciated asset, their heirs inherit it at its current market value, not the original purchase price. A stock bought for $10,000 and worth $200,000 at death passes to heirs with a $200,000 basis — the entire $190,000 unrealized gain simply disappears for tax purposes and is never taxed to anyone.
Frequently asked questions
Do I owe taxes on unrealized gains?
No. Unrealized gains are not taxed under current IRS rules for typical individual investors. You only owe tax once you sell the asset and the gain becomes realized, with a narrow exception for traders who make a mark-to-market election.
What is the difference between short-term and long-term capital gains?
Short-term gains come from assets held one year or less and are taxed as ordinary income, up to 37%. Long-term gains come from assets held more than one year and are taxed at lower rates of 0%, 15%, or 20% depending on your income.
How do I report a realized gain on my taxes?
You report realized gains on Form 8949, listing the purchase and sale dates, cost basis, and proceeds for each sale. The totals then carry over to Schedule D, which summarizes your net short-term and long-term gains for the year.
Does an unrealized gain count toward my income?
No. An unrealized gain increases your net worth on paper but is not counted as income by the IRS until you sell. It can also shrink or vanish entirely if the asset's price falls before you sell.
Can unrealized gains ever avoid taxes permanently?
Yes, through the step-up in basis at death. When you inherit an asset, your cost basis resets to its value on the date of death, which erases any unrealized gain the original owner built up and means it's never taxed.
Free calculators to help you decide
Sources
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