The capital loss deduction limit is $3,000 per year against ordinary income for single filers, heads of household, and married couples filing jointly, and $1,500 for married individuals filing separately.1Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses Anything above that cap doesn’t disappear. It carries forward to future tax years, with no expiration, until you’ve used every dollar.
The cap has sat at $3,000 since 1978 and has never been indexed for inflation.
Losses Offset Gains Before the Cap Applies
The $3,000 ceiling only comes into play after your losses have first been used to cancel out your capital gains for the year. Say you had $10,000 in gains and $18,000 in losses. The first $10,000 in losses erases the gains entirely. Of the remaining $8,000, you deduct $3,000 against wages and other ordinary income, and $5,000 carries into next year.
If your losses only slightly exceed your gains, the whole net loss may fit under the $3,000 limit, and nothing carries forward.
Short-Term and Long-Term Netting
The IRS requires a specific netting process because short-term and long-term results are taxed differently. Assets held one year or less produce short-term gains or losses; assets held longer produce long-term gains or losses.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses
Combine all short-term transactions into a single net figure. Do the same for long-term. If both categories show a net loss, add them for your total. If one shows a gain and the other a loss, subtract to find the net. A net long-term loss can reduce a net short-term gain, and the reverse also works. Whatever remains is what runs through the $3,000 cap and any carryover calculation.
How Carryovers Work Year After Year
Excess losses carry forward indefinitely and keep their original character: short-term losses stay short-term, long-term losses stay long-term.3Office of the Law Revision Counsel. 26 USC 1212 – Capital Loss Carrybacks and Carryovers There is no time limit at all. If you have $60,000 in unused losses and no future gains, it takes twenty years of $3,000 deductions to consume them, and that is a legitimate use of the rule.
Each year, the carried amount enters the netting process as if it were a fresh loss for that year. It offsets any new gains first, then reduces ordinary income up to the annual cap. Even in a year with no investment activity, you still claim the $3,000 deduction against wages and push what’s left forward again.
The Capital Loss Carryover Worksheet in the Schedule D instructions handles the tracking.4Internal Revenue Service. Instructions for Schedule D (Form 1040) Filling it out each year is the cleanest way to avoid mistakes once several years have stacked up.
Carryovers End When the Taxpayer Dies
Unused carryovers can be claimed on the decedent’s final income tax return, still subject to the $3,000 limit, but they do not pass to the estate or to surviving family.5Internal Revenue Service. IRS Resource Guide – Decedents and Related Issues Anyone sitting on a large carryover with appreciated assets elsewhere may want to realize gains in a year when the losses can absorb them, rather than leave the deduction stranded.
Losses That Don’t Count Toward the Deduction
Some losses at sale never help you at tax time. Two categories catch people repeatedly.
Personal-Use Property
A loss on your home, car, furniture, or other personal-use property is not deductible. Federal law limits individual loss deductions to trade or business losses, transactions entered into for profit, and certain casualty or theft events.6Office of the Law Revision Counsel. 26 USC 165 – Losses A house bought for $400,000 and sold for $320,000 produces no tax benefit.7Internal Revenue Service. What if I Sell My Home for a Loss? The loss doesn’t count toward the $3,000 ceiling and doesn’t carry forward.
Sales to Related Parties
Sell an investment at a loss to a family member, a trust you control, a corporation you own more than half of, or certain other related parties, and the IRS disallows the loss entirely. Family here means siblings, spouse, parents, grandparents, children, and grandchildren.8Office of the Law Revision Counsel. 26 USC 267 – Losses, Expenses, and Interest With Respect to Transactions Between Related Taxpayers
If the related buyer later sells at a gain, that gain is taxed only to the extent it exceeds the previously disallowed loss. The benefit isn’t destroyed, but it shifts to the buyer and only shows up if a profitable sale actually happens.
The Wash Sale Rule Can Quietly Erase a Loss
The wash sale rule blocks a loss deduction when you buy a substantially identical security within a 61-day window: 30 days before the sale, the day of the sale, and 30 days after.9Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities The disallowed amount is added to the basis of the replacement, so you generally recover the benefit later when you sell the replacement, unless you trigger another wash sale in the meantime.
“Substantially identical” is not tightly defined in the statute. Swapping one S&P 500 index fund for a near-clone from another provider could be challenged. Selling a stock and buying a call option on the same stock plainly counts. The safe route when harvesting losses is to wait out the 30 days or move into something meaningfully different.
The IRA Version Is Worse
Selling a stock at a loss in your taxable account and buying the same stock in your IRA within the window still triggers the wash sale rule. In this version there is no consolation. The disallowed loss cannot be added to the basis of shares held inside the IRA, so the deduction is gone for good.10Internal Revenue Service. Publication 550 – Investment Income and Expenses
Cryptocurrency Sits Outside the Rule
The wash sale statute covers “stock or securities.”9Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities Cryptocurrency and other digital assets do not fall within that definition under current law, so a Bitcoin loss followed by an immediate repurchase is not disallowed as a wash sale. Legislation to close the gap has been proposed, so the window may not stay open.
Reporting the Loss
Your broker sends Form 1099-B after year-end. It shows proceeds and, for covered securities, cost basis, acquisition date, and whether the result is short-term or long-term.11Internal Revenue Service. Instructions for Form 1099-B Check the basis figures. Brokers sometimes report them incorrectly, especially for shares from reinvested dividends, stock splits, or transfers between firms.
Each transaction goes on Form 8949, split between short-term (Part I) and long-term (Part II), with any adjustments such as wash sale disallowances entered in the adjustment column.12Internal Revenue Service. Instructions for Form 8949 The totals flow to Schedule D, which handles the netting, applies the $3,000 cap, and calculates the carryover to next year.4Internal Revenue Service. Instructions for Schedule D (Form 1040) Tax software does the arithmetic, but knowing the flow helps you catch a bad basis figure before it costs you.
Keep the supporting records for at least three years after filing.13Internal Revenue Service. How Long Should I Keep Records If you’re carrying losses forward, keep the records from the original loss year until three years after the final return that uses the carryover, even if that stretches well past the usual retention period.