Are Capital Gains Passive Income for Tax Purposes?

Capital gains are not passive income in most situations. Under federal tax law, profits from selling stocks, bonds, mutual funds, and similar investments belong to a separate category the IRS calls portfolio income, which has its own rules for tax rates and loss deductions. There is one meaningful exception: when you sell your entire stake in a business you did not actively help run, the resulting gain keeps the passive character of the underlying activity. That distinction changes which losses you can use, which forms you file, and whether a 3.8% surtax lands on top.

The Three Income Buckets

The IRS sorts income into three categories, and each one has its own rules. You cannot freely move losses from one bucket to offset gains in another, which is why classification carries real money consequences.

Active income covers wages, salaries, tips, and self-employment earnings from work you perform directly.
Portfolio income covers interest, dividends, and gains from selling investment assets like stocks and bonds.
Passive income covers earnings from a trade or business in which you do not materially participate, plus nearly all rental income.

The passive category is defined under Internal Revenue Code Section 469. An activity qualifies as passive if it involves a trade or business and the taxpayer does not materially participate.¹ Material participation is not vague. IRS Publication 925 lays out seven tests, and the most common one requires logging more than 500 hours in the activity during the tax year.² Clear that bar and the activity is not passive for you.

Why Stock and Fund Sales Are Portfolio Income

Sell shares of stock, a mutual fund, an ETF, or a bond at a profit and the gain is portfolio income. Holding period doesn’t change that. Neither does the depth of your research before buying. The IRS draws a bright line: gains from assets held for investment purposes fall outside the passive activity rules.²

The practical consequence catches people off guard. If you lost money on a rental property or a side business where you were a silent investor, you generally cannot apply that passive loss against a profit from selling a stock. The tax code keeps those worlds separate. Your stock gains land on Schedule D of Form 1040, while passive activity gains and losses run through different forms entirely.³

When a Capital Gain Does Count as Passive

The main exception kicks in when you sell your entire interest in a business you did not materially participate in. A limited partnership stake, shares in an S-corporation you never managed, a membership interest in an LLC someone else ran. Because the activity was passive while you owned it, the gain from selling that interest keeps its passive character.¹

This is where the classification actually pays off. Many passive investors accumulate suspended losses over the years. Passive losses can only offset passive income, and if you haven’t had enough passive income to absorb them, those losses pile up. When you finally sell your entire passive interest, two things happen at once: the gain is passive, so your suspended losses can offset it, and any remaining excess losses get released as ordinary deductions against your other income.¹

Say you sell a limited partnership stake for a $60,000 gain and have $45,000 in suspended passive losses from that same investment. The $45,000 wipes out most of the gain, leaving only $15,000 taxable. If the suspended losses had exceeded the gain, the leftover would have come off the shelf and reduced your active or portfolio income for that year. The word “entire” matters. A partial sale does not unlock suspended losses the same way.

Rental Property Sales

Rental real estate has its own corner of Section 469. Rental income is automatically treated as passive regardless of how many hours you spend managing the property.¹ When you eventually sell, the capital gain is passive, and suspended losses from that property can offset it under the same entire-interest disposition rule.

The $25,000 Allowance for Smaller Landlords

If you actively participate in a rental real estate activity, you can deduct up to $25,000 of rental losses against your nonpassive income each year, even though the rental is technically passive.⁴ Active participation is a lower bar than material participation. Approving tenants, setting rent, and authorizing repairs generally satisfies it.

The allowance starts phasing out once your modified adjusted gross income exceeds $100,000, and it disappears entirely at $150,000.² Above the phase-out, rental losses get suspended until you either generate passive income or sell the property.

Real Estate Professional Status

A separate exception applies if real estate is your primary work. Spend more than 750 hours per year in real property businesses where you materially participate, and have those hours represent more than half of all personal services you perform in any trade or business, and your rental activities escape the automatic passive classification.¹ You still need to materially participate in each specific rental activity. Meet both thresholds and rental losses become fully deductible against all income types.

Classification Does Not Set the Rate

Whether a capital gain is portfolio or passive does not change the tax rate applied to it. Rate depends on holding period. Assets held for one year or less produce short-term gains, taxed at the same graduated rates as your wages, running from 10% to 37% in 2026. Assets held more than one year qualify for lower long-term rates.⁵

The 2026 long-term thresholds, from IRS Revenue Procedure 2025-32:⁶

0% on taxable income up to $49,450 for single filers, or $98,900 for married couples filing jointly.
15% on taxable income from $49,451 to $545,500 for single filers, or $98,901 to $613,700 for joint filers.
20% on taxable income above those upper figures.

The 3.8% Net Investment Income Tax

Portfolio or passive, both types of capital gain can trigger an additional 3.8% surtax under Section 1411. The Net Investment Income Tax applies when your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for married couples filing jointly.⁷ The tax equals 3.8% of the lesser of your net investment income or the amount by which your modified AGI exceeds the threshold.

Those thresholds are not adjusted for inflation. They have been frozen at $200,000 and $250,000 since the tax took effect in 2013.⁸ Ordinary tax brackets, the standard deduction, and the long-term capital gains thresholds all get annual inflation adjustments. The NIIT does not. If your household income sits anywhere near $250,000, a single large capital gain from a stock sale or property disposition can push you over and create a tax bill you did not plan for.

Which Forms the Classification Sends You To

How a gain is classified determines what gets attached to your return.

Schedule D (Form 1040) reports sales of stocks, bonds, mutual funds, and other investment assets. This is the standard form for portfolio capital gains and losses.³
Form 8582 calculates the allowable passive loss deduction and tracks suspended losses carried to future years. The $25,000 rental allowance is figured here too.⁴
Form 8960 calculates the 3.8% surtax, which lumps portfolio gains and passive income together for that purpose.⁹

Sell a rental property or a passive business interest and you may need all three: Schedule D for the gain, Form 8582 to release suspended passive losses against it, and Form 8960 if your income is high enough to trigger the surtax. Clean records of your participation hours, cost basis, and accumulated suspended losses through the year make filing far less painful than reconstructing everything in April.

1
Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited
2
Internal Revenue Service. Publication 925, Passive Activity and At-Risk Rules
3
Internal Revenue Service. About Schedule D (Form 1040), Capital Gains and Losses
4
Internal Revenue Service. Instructions for Form 8582, Passive Activity Loss Limitations
5
Internal Revenue Service. Topic No. 409, Capital Gains and Losses
6
Internal Revenue Service. Rev. Proc. 2025-32
7
Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax
8
Congressional Research Service. The 3.8% Net Investment Income Tax: Overview, Data, and Policy Options
9
Internal Revenue Service. About Form 8960, Net Investment Income Tax