On a Form 1040, loss carryforwards go in three different places depending on the type of loss. Capital loss carryforwards from prior years go on Schedule D, Line 6 (short-term) and Line 14 (long-term). Net operating loss carryforwards go on Schedule 1, Line 8a, with Form 172 attached. Passive activity loss carryforwards enter through the worksheets to Form 8582 and, once allowed, flow to Schedule E. Each has its own limits, so the line entry is only half of the answer.
Capital Loss Carryforwards on Schedule D
Schedule D (Form 1040) is the entry point for any capital loss you couldn’t use last year. The form splits the carryover by holding period. Short-term carryovers from assets held one year or less go on Part I, Line 6, labeled “Short-term capital loss carryover.” Long-term carryovers from assets held more than one year go on Part II, Line 14, labeled “Long-term capital loss carryover.”1IRS.gov. Schedule D (Form 1040) The two categories are kept separate because short-term and long-term amounts are taxed differently, and losses of each type must first offset gains of the same type.
The exact numbers for Lines 6 and 14 come from the Capital Loss Carryover Worksheet in your prior year’s Schedule D instructions. Line 8 of that worksheet gives the short-term figure; Line 13 gives the long-term figure.2Internal Revenue Service. Instructions for Schedule D (Form 1040) (2025) If you filed with tax software last year, the software carried these forward. If not, you can pull a copy of last year’s return from your IRS online account.3Internal Revenue Service. Get Your Tax Records and Transcripts
The $3,000 Cap and Why the Carryforward Doesn’t Expire
After Schedule D nets your current-year gains and losses against the carryover, only $3,000 of net capital loss can offset ordinary income like wages in a single year. The cap drops to $1,500 for married filing separately.4Internal Revenue Service. 2025 Instructions for Schedule D (Form 1040) Anything above the cap rolls to next year automatically.
For individuals, capital loss carryforwards never expire. The statute moves any unused loss into the “succeeding taxable year” and keeps doing so until it’s absorbed.5Office of the Law Revision Counsel. 26 USC 1212 – Capital Loss Carrybacks and Carryovers A $50,000 loss with no offsetting gains works down at $3,000 per year, and you’re expected to keep records the whole time.
Net Operating Loss Carryforwards on Schedule 1
If prior-year business deductions exceeded your income, the resulting net operating loss carries forward on Schedule 1 (Form 1040), Part I, Line 8a, labeled “Net operating loss.”6Internal Revenue Service. 2025 Schedule 1 (Form 1040) Enter the amount as a negative number. Without the minus sign, you’d be adding the loss to your income rather than subtracting it.
You also attach Form 172, Net Operating Losses, when claiming an NOL carryforward. Form 172 replaced the informal worksheets taxpayers used to compute and track NOLs, and it walks through how the loss was calculated, how much has been used, and how much remains.7Internal Revenue Service. Instructions for Form 172 (12/2024) Attach one Form 172 for each NOL year you’re still carrying.
The Line 8a deduction reduces adjusted gross income directly, which then flows to the front of Form 1040 and affects the credits and deductions that key off AGI.
The 80% Limit and the Excess Business Loss Gate
Under the Tax Cuts and Jobs Act, NOLs arising in tax years after 2017 can offset at most 80% of current-year taxable income. The remaining 20% stays taxable regardless of how large the carryforward is, and the excess rolls forward again.8Internal Revenue Service. Tax Cuts and Jobs Act – A Comparison for Businesses Post-2017 NOLs carry forward indefinitely.
Before an NOL is even created, Section 461(l) caps how much business loss a non-corporate taxpayer can deduct in a single year. For 2025 the threshold is $313,000 for single filers and $626,000 for joint filers, both indexed for inflation.9Internal Revenue Service. 2025 Instructions for Form 461 Anything above that is computed on Form 461 and treated as an NOL carryforward, feeding into next year’s Form 172.
Corporate NOLs on Form 1120
C-corporations don’t use Schedule 1 or Form 172. A corporation reports its NOL deduction on Form 1120, page 1, Line 29a, labeled “Net operating loss deduction,” and attaches a statement showing how the deduction was computed.10Internal Revenue Service. Instructions for Form 1120 (2025) The 80% limit applies to corporate NOLs arising after 2017 as well.
Passive Activity Loss Carryforwards on Form 8582
Losses from rental property or a business you don’t actively run are passive, and they can only offset passive income. When the current year’s passive income isn’t enough, the disallowed portion carries forward and gets reconciled on Form 8582, Passive Activity Loss Limitations.11Internal Revenue Service. 2025 Instructions for Form 8582 – Passive Activity Loss Limitations
Prior-year carryforwards enter through the worksheets, not the face of the form. Part IV of the worksheets covers rental real estate with active participation; Part V covers all other passive activities. In both, the carryforward goes in column (c), labeled “Prior years’ unallowed losses.” Those numbers come from Part VII, column (c) of last year’s Form 8582.12Internal Revenue Service. Form 8582 (2025) Passive Activity Loss Limitations The worksheet totals feed Part I of the form, where they’re combined with current-year activity.
Once Form 8582 determines how much loss is allowed for the year, the allowed amount lands on the appropriate schedule. Rental losses go to Schedule E, Part I, Line 22. Partnership or S-corporation passive losses go to Schedule E, Part II.11Internal Revenue Service. 2025 Instructions for Form 8582 – Passive Activity Loss Limitations
The $25,000 Rental Real Estate Allowance
If you actively participate in a rental, meaning you make management decisions like approving tenants and setting rent, you can deduct up to $25,000 of rental losses against non-passive income without needing passive income to absorb it. For married filing separately taxpayers who lived apart all year, the limit is $12,500.13Internal Revenue Service. Publication 925 (2025), Passive Activity and At-Risk Rules
The allowance phases out once modified adjusted gross income exceeds $100,000, at a rate of 50 cents lost for every dollar over the threshold, disappearing entirely at $150,000.13Internal Revenue Service. Publication 925 (2025), Passive Activity and At-Risk Rules Losses blocked by the phase-out become part of the following year’s carryforward.
Disposing of the Activity Frees the Suspended Losses
Selling your entire interest in a passive activity unlocks the accumulated suspended losses. In the year of a complete disposition, the full amount becomes deductible against any income, not just passive income.13Internal Revenue Service. Publication 925 (2025), Passive Activity and At-Risk Rules The sale must be a fully taxable transaction and the buyer cannot be a related party.
Capital Loss Carryover Under the AMT
If the alternative minimum tax applies to you, your capital loss carryover for AMT purposes may differ from the regular-tax figure. Gains and losses from incentive stock options and basis differences are computed differently under the AMT, and the adjustment shows up on Form 6251, Line 2k.14Internal Revenue Service. Instructions for Form 6251 The Schedule D instructions include a separate AMT Capital Loss Carryover Worksheet for computing the AMT figure. Most filers won’t need it; if you’ve exercised ISOs or have significant depreciation adjustments, check.
What Happens to Carryforwards After Death
Capital loss carryforwards belong to the individual and can only be claimed on the decedent’s final income tax return.15Internal Revenue Service. Publication 559 (2025), Survivors, Executors, and Administrators A joint return filed for the year of death counts as the final return, so a surviving spouse can use the carryover there. After that, any remaining balance is gone. It does not move to the estate.
Estates and trusts follow a different rule. When an estate or trust terminates and distributes its remaining assets, any unused NOL or capital loss carryovers pass through to the beneficiaries receiving the property, who pick them up in the year the estate closes.16eCFR. 26 CFR 1.642(h)-1 – Unused Loss Carryovers on Termination of an Estate or Trust
Keep the Supporting Records the Whole Time
A carryforward creates a records problem that catches filers off guard. The IRS asks you to keep records supporting any item on a return until the statute of limitations for that return expires, and a loss that spans years extends the window to the life of the carryforward plus the limitations period on the final return that uses it.17Internal Revenue Service. How Long Should I Keep Records A capital loss that takes ten years to absorb at $3,000 per year needs the original documentation for all ten years and three more after the final use. For worthless securities the IRS recommends seven years. The safe practice is to hold the original Schedule D worksheets, brokerage statements, and Form 172 calculations as long as any carryforward balance is still open.