A capital loss is a disposition loss with capital character, generally measured when adjusted basis exceeds the applicable amount realized.
A capital loss occurs when the adjusted basis of a capital asset exceeds the net amount realized from its sale, exchange, or other recognized disposition. It is not simply a decline in market value, and a calculated loss is not necessarily deductible in the current tax year.
Tax treatment depends on the asset’s character, the taxpayer, holding period, recognition rules, other gains and losses, and limitations such as the wash-sale and related-party rules. The term should therefore be separated from an unrealized portfolio loss, an ordinary business loss, and a current tax deduction.
A useful measurement framework is:
When that result is negative and the transaction has capital character, the absolute value is the preliminary capital loss:
The words preliminary and capital matter. Recognition, deductibility, holding period, wash-sale treatment, related-party rules, and year-wide netting still need to be evaluated.
| Calculation input | What to establish | Typical evidence |
|---|---|---|
| Amount realized | Cash, fair value of noncash consideration, and relevant liabilities under the applicable rule | Trade confirmation, closing statement, contract, and valuation support |
| Selling costs | Commissions, redemption fees, and qualifying disposition costs | Broker statement, invoice, and settlement record |
| Adjusted basis | Original cost or other prescribed basis plus and minus required adjustments | Purchase records, lot history, distribution notices, improvement invoices, and depreciation schedules |
| Character | Whether the asset and transaction produce capital, ordinary, section 1231, or another result | Asset use, taxpayer activity, contract, and governing tax rule |
flowchart LR
A["Asset value declines"] --> B{"Sale, exchange, worthlessness, or other disposition rule?"}
B -->|"No"| C["Unrealized economic loss"]
B -->|"Yes"| D["Compare net amount realized with adjusted basis"]
D --> E{"Negative result?"}
E -->|"No"| F["No realized loss"]
E -->|"Yes"| G["Determine asset and loss character"]
G --> H["Apply recognition and loss limitations"]
H --> I["Classify short-term or long-term"]
I --> J["Net with gains, losses, and carryovers"]
J --> K["Determine current deduction or future carryover"]
A brokerage account can show a loss without a recognized tax event. It can also show an estimated realized loss that differs from the return because the platform lacks external-account transactions, inherited or gifted basis, wash sales, or another required adjustment.
Assume an investor buys 200 shares for $8,000 and pays a $20 purchase commission. A later return-of-capital distribution reduces the lot’s basis by $300. The investor sells all 200 shares for $6,500 and pays a $15 sale commission.
First determine adjusted basis:
Then determine the preliminary loss:
The transaction produces a preliminary $1,235 loss. If the shares were investment capital assets, the loss generally has capital character. The investor must still determine the holding period, inspect replacement purchases for wash-sale treatment, combine the result with the full year’s other transactions, and apply the rules for the relevant taxpayer and year.
The economic loss from the initial cash outlay is not necessarily identical to the tax loss because the return-of-capital distribution returned value earlier and reduced basis.
Assume an individual has these recognized capital transactions in one tax year. The figures are fictional and omit specialized rate and limitation rules.
| Category | Gains | Losses | Category result |
|---|---|---|---|
| Short-term | $4,000 | ($9,000) | ($5,000) |
| Long-term | $12,000 | ($3,000) | $9,000 |
The short-term category produces a $5,000 net loss, while the long-term category produces a $9,000 net gain. Netted against each other, the simplified result is a $4,000 net long-term gain.
It would be wrong to describe the $12,000 long-term gain as fully taxable while treating all $12,000 of losses as a separate ordinary deduction. Capital transactions are combined under category and cross-netting rules before the final result is used.
If losses exceeded gains after netting, an individual might be able to deduct a limited amount against other income and carry the unused loss forward. The current limit, filing-status treatment, and carryover worksheet should be taken from the applicable Schedule D instructions rather than hard-coded into a long-lived article.
These labels describe different stages:
| Measure | Meaning | Main limitation |
|---|---|---|
| Economic loss | Wealth or expected value has declined | Can exist without a tax event |
| Unrealized loss | Current market value is below a selected historical amount while the asset remains held | Basis, valuation source, currency, and accrued income affect interpretation |
| Realized loss | A disposition produces amount realized below adjusted basis | Character and recognition still need analysis |
| Recognized loss | Tax rules recognize the realized loss in the relevant period | A deferral or disallowance rule can change timing or amount |
| Deductible capital loss | Recognized capital loss allowed in the current tax calculation after netting and limits | May be absorbed by gains, limited, or carried to another year |
A realized loss can be genuine even when it is not currently deductible. Wash sales, related-party sales, straddles, personal-use property rules, and account-specific provisions can defer or disallow a tax benefit without changing the fact that the asset fell in value.
The loss calculation does not establish tax character by itself. Under U.S. federal rules, investment shares, bonds, and many other investments can be Capital Assets. Inventory, property held mainly for sale to customers, many business receivables, depreciable business property, business real estate, and certain specialized assets follow other rules.
| Situation | General starting point | Caution |
|---|---|---|
| Investment stock sold below adjusted basis | Capital loss | Wash-sale, lot-identification, and holding-period rules may apply |
| Merchandise sold below cost | Ordinary business result | Inventory accounting, not capital-loss treatment, controls |
| Depreciable equipment sold below adjusted basis | Business-property analysis | Section 1231 and recapture rules can apply |
| Personal vehicle sold for less than basis | Personal-use capital loss | Generally not deductible for U.S. federal income tax |
| Security becomes completely worthless | Deemed disposition rules can produce capital loss | Worthlessness and the correct tax year must be substantiated |
| Loan becomes uncollectible | Business or nonbusiness bad-debt rules may apply | Not every unpaid loan is a capital-asset sale |
The same economic decline can therefore produce a capital loss, ordinary loss, deferred loss, nondeductible loss, or no current tax event.
U.S. individual capital losses are generally classified as short-term or long-term using the disposed asset’s tax holding period. Investment property held for one year or less is generally short-term; property held for more than one year is generally long-term. Gifts, inherited property, short sales, options, commodity positions, and other transactions can follow special rules.
The categories are important because short-term gains and losses are combined separately from long-term gains and losses before opposing category results are netted. A loss does not lose its holding-period character merely because it becomes a Capital Loss Carryover.
Under the U.S. wash-sale rule, a loss on stock or securities can be disallowed currently when substantially identical stock or securities are acquired within the statutory period around the loss sale. In a standard taxable-account example, the disallowed loss is generally added to the replacement property’s basis and the holding period can be affected.
Suppose an investor sells shares with an $800 loss and purchases the same number of substantially identical shares ten days later. If the full wash-sale rule applies, the $800 generally is not a current deductible loss; it is typically added to the replacement shares’ basis, deferring its effect until a later qualifying disposition.
The rule is broader than a same-day repurchase in one account. Contracts or options, purchases by a spouse, and transactions involving retirement accounts can create additional issues. Broker reporting may not identify every cross-account or cross-broker wash sale. The dedicated Wash-Sale Rule article covers the mechanism in more detail.
U.S. federal rules generally do not allow a deduction for loss on the sale or exchange of personal-use property. A car, furniture, or primary residence can decline in value and be sold at a real economic loss without creating a deductible capital loss. A gain on personal-use property can still be reportable.
Other restrictions can apply to:
This asymmetry is important: tax law does not promise equal treatment for every gain and loss.
An investor does not always need an ordinary market sale to recognize a capital loss. IRS Publication 550 explains that qualifying stocks, stock rights, and bonds that become completely worthless during the year are generally treated as sold on the last day of that tax year for U.S. federal purposes.
The standard is complete worthlessness, not merely a severe decline, exchange delisting, trading halt, bankruptcy filing, or illiquidity. Evidence can include court records, liquidation information, issuer financial statements, canceled rights, and the absence of residual value. Establishing the correct year matters because it affects the return, holding-period classification, and amendment deadline.
For U.S. individuals, capital losses first offset capital gains under short-term and long-term netting rules. A limited remaining net loss may offset other income, and unused amounts can generally move to later years under the individual carryover calculation.
U.S. C corporations follow a different framework. Corporate capital losses generally offset capital gains rather than ordinary income, and corporate carryback and carryforward periods differ from the individual rules. Trusts, estates, regulated investment companies, partnerships, nonresidents, and state tax systems also require separate analysis.
Do not apply an individual Schedule D limit or indefinite individual carryforward assumption to a corporation merely because both taxpayers sold a capital asset at a loss.
Capital losses affect after-tax return, liquidity, portfolio rebalancing, and the timing of tax payments. They can also reveal that a reported performance figure and a tax-return result use different bases, valuation dates, currencies, or transaction populations.
Tax-Loss Harvesting can accelerate recognition of selected losses while maintaining a portfolio allocation through a different investment. It does not recover the money lost, guarantee that the loss will be usable, or make a replacement investment equivalent. Trading costs, bid-ask spreads, market movement, tracking error, wash-sale treatment, and future gain recognition can reduce or reverse the expected benefit.
The following sources describe U.S. federal treatment. Other jurisdictions can use different definitions, netting systems, deduction limits, and carryover periods.
This article provides general financial and U.S. tax education. It is not individualized tax, legal, accounting, retirement, business, or investment advice and does not establish a filing position. Current law, jurisdiction, taxpayer type, account structure, basis records, and transaction facts control the result.