How Short-Term Capital Losses Work on Your Taxes

Short-term capital losses are losses on investments you held for one year or less, and they work on your taxes through a fixed order: they offset your short-term gains first, then any leftover long-term gains, then up to $3,000 of ordinary income like wages or interest. Anything still unused carries forward to future years with no expiration date. You don’t have to itemize to get the deduction, so it stacks on top of the standard deduction.

What Makes a Loss Short-Term

A short-term capital loss happens when you sell a capital asset for less than you paid and you held it for one year or less. Capital assets include stocks, bonds, mutual fund shares, real estate held for investment, and digital assets like cryptocurrency.¹

The holding period starts the day after you acquire the asset and ends the day you sell. Buy stock on March 10, 2025 and sell on March 10, 2026 and it’s still short-term at exactly one year. Sell on March 11 and it becomes long-term. That one-day difference changes both the tax rate on any gain and how a loss moves through the netting rules below.

Digital assets follow the same rules. The IRS treats cryptocurrency, NFTs, and similar property as capital assets, not currency, so a sale or trade held one year or less produces a short-term gain or loss reported on the same forms as stock transactions.²

When a Security Becomes Worthless

You don’t need an actual sale to claim a loss on a stock or bond that becomes completely worthless. The tax code treats it as sold on the last day of the taxable year for zero dollars.³ That deemed December 31 sale date is what determines whether the loss is short-term or long-term, so count from your actual purchase date to year-end when classifying the holding period.⁴

Losses That Never Qualify

Personal-use property is the trap most people don’t see coming. Selling your home, your car, or your furniture at a loss produces no deduction at all. The capital loss rules only reach investment property and business property, meaning assets you held to generate income or profit.

How the Netting Works

You can’t just subtract short-term losses from your paycheck. The IRS requires a netting process that pairs gains and losses against each other before any deduction against ordinary income becomes available.

Add up all your short-term gains and all your short-term losses for the year. If losses exceed gains in that bucket, you have a net short-term capital loss. Do the same for long-term transactions.⁵ If one bucket ends in a net loss and the other in a net gain, they offset each other. Net short-term losses wipe out net long-term gains, and vice versa.

Absorbing long-term gains with short-term losses is quietly favorable. Long-term gains would otherwise be taxed at preferential rates of 0%, 15%, or 20%, while short-term losses that make it through to ordinary income offset wages taxed at your full marginal rate. Either use of the loss helps, but soaking up ordinary income usually helps more.

If both buckets are net losses, or if a loss remains after cross-category netting, the combined amount moves to the deduction stage.

The $3,000 Deduction Against Ordinary Income

After netting, any leftover net capital loss offsets up to $3,000 of ordinary income per year. The cap drops to $1,500 if you’re married filing separately.¹ The deduction reduces your adjusted gross income, which can pull you under income-based phaseouts for other credits and deductions.

Two details catch people. You don’t have to itemize. The deduction lands on line 7a of Form 1040, in the income section, so it applies on top of your standard deduction.¹ And the deduction is capped at the lesser of $3,000 or your actual net loss. A net loss of $1,800 gives you an $1,800 deduction, not $3,000.

Carrying the Rest Forward

A net capital loss above the annual cap carries into the next tax year. The carryover keeps its original character: short-term stays short-term, long-term stays long-term.⁶ Next year it enters the same netting process, first absorbing gains in its own bucket, then crossing over, then applying the $3,000 rule.

There’s no time limit for individual taxpayers. A $50,000 net short-term loss could take more than 16 years to burn off if you never generate offsetting gains, but it doesn’t expire. You calculate the amount that rolls forward each year using the Capital Loss Carryover Worksheet in the Schedule D instructions.⁷

One hard deadline does exist. Capital loss carryovers die with the taxpayer. A loss carried forward by someone who passes away can only be used on their final income tax return; the estate cannot inherit it and family members cannot claim it on their own returns.⁸ If large carryovers are sitting on your return and health is a concern, that’s worth raising with a tax professional, because accelerating gains to absorb the losses first may be possible.

The Wash Sale Rule

The wash sale rule blocks a loss deduction when you sell a security at a loss and buy the same or a substantially identical security within 30 days before or 30 days after the sale.⁹ That’s a 61-day window around the sale during which repurchasing kills the deduction for the year.

The disallowed loss isn’t destroyed in a normal wash sale. It gets added to the cost basis of the replacement shares, so when you eventually sell those in a clean transaction, the original loss is baked into the calculation. The rule delays the deduction rather than erasing it.⁹

The IRA Version Is Worse

Sell stock at a loss in your taxable brokerage account and buy the same stock inside your IRA or Roth IRA within 30 days, and the IRS treats that as a wash sale. Because retirement accounts don’t track individual cost basis for tax purposes, the basis adjustment has nowhere to go. The loss disappears permanently.¹⁰

Crypto Sits Outside the Rule

The wash sale statute applies to “stock or securities.” Because the IRS classifies digital assets as property rather than securities, the wash sale rule does not currently apply to cryptocurrency.² You can sell Bitcoin at a loss and immediately repurchase it without disqualifying the loss. Congress has proposed closing this gap in multiple sessions, but as of 2026 no such law has passed. Verify the current rules before relying on it.

The Small Business Stock Exception

Some stock losses skip the capital loss system entirely. If you bought stock directly from a domestic corporation that had received no more than $1 million in total capital contributions at the time of issuance, and the company earned more than half its revenue from active business operations rather than passive income, the stock may qualify under Section 1244.¹¹

Losses on Section 1244 stock are treated as ordinary losses. They bypass the $3,000 annual cap and offset ordinary income dollar for dollar, up to $50,000 per year, or $100,000 on a joint return.¹¹ A failed startup investment that would otherwise take decades of $3,000 deductions to write off can be recovered in a single year. Any loss beyond those caps drops back into standard capital loss treatment.

Forms You Actually File

Three forms handle capital losses. Getting them wrong won’t change what you owe, but it can generate IRS notices you’ll have to answer.

Every individual sale goes on Form 8949, with short-term transactions in Part I and long-term in Part II.¹² Starting in 2026, brokers must report cost basis on certain digital asset transactions, so crypto investors will face the same 1099-B reconciliation that stock investors already do.²

The totals from Form 8949 feed into Schedule D, where the netting happens on paper. Short-term nets in Part I, long-term in Part II, and the bottom of the form combines them.⁷ Schedule D also calculates the deductible amount for the year, capped at $3,000 or $1,500, on line 21. That figure moves to line 7a of Form 1040, reducing total income before deductions.¹

If a carryover remains, the Capital Loss Carryover Worksheet in the Schedule D instructions tells you how much rolls into next year. Keep a copy with your return so you have the figure ready when you file again.⁷

1
Internal Revenue Service. Topic No. 409, Capital Gains and Losses
2
Internal Revenue Service. Digital Assets
3
Office of the Law Revision Counsel. 26 USC 165 – Losses
4
eCFR. 26 CFR 1.165-5 – Worthless Securities
5
Office of the Law Revision Counsel. 26 USC 1222 – Other Terms Relating to Capital Gains and Losses
6
Office of the Law Revision Counsel. 26 USC 1212 – Capital Loss Carrybacks and Carryovers
7
Internal Revenue Service. Instructions for Schedule D (Form 1040)
8
Internal Revenue Service. Decedent Tax Guide
9
Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities
10
Internal Revenue Service. Revenue Ruling 2008-5
11
Office of the Law Revision Counsel. 26 USC 1244 – Losses on Small Business Stock
12
Internal Revenue Service. Instructions for Form 8949 (2025)