Tax Loss Carryforward Examples: Individual and Business Rules

A tax loss carryforward lets you apply a loss from one tax year against income in a later year instead of losing the deduction when the calendar flips. For individuals, the ceiling is $3,000 of net capital loss against ordinary income per year, with the rest rolling forward indefinitely. For businesses, a net operating loss can offset up to 80% of taxable income in a future profitable year, also with no expiration. The mechanics differ, but the principle is the same: a loss that lands in the wrong year doesn’t have to go to waste.

How the Individual Carryforward Works

Two sections of the Internal Revenue Code do the work. Section 1211 sets the annual limit, and Section 1212 governs the leftover. Capital losses first offset capital gains for the year. If losses exceed gains, you can deduct up to $3,000 of the remaining net loss against ordinary income such as wages, salary, or interest. Married filing separately drops that to $1,500.¹

Whatever you can’t use in the current year carries into the next under Section 1212. That continues year after year until the loss is absorbed. No expiration, no cap on the number of years.²

Short-Term and Long-Term Losses Keep Their Character

A carried-forward loss keeps its original character. Short-term stays short-term; long-term stays long-term. Short-term losses first offset short-term gains, long-term losses first offset long-term gains, and only what’s left after that internal netting combines across categories. Since short-term gains are taxed at ordinary rates and long-term gains at preferential rates, the character of your carryforward affects the actual dollars of tax you save.²

A Worked Example for Individuals

Say you sell a tech stock at a $10,000 long-term capital loss. Same year, you sell another investment for a $2,000 long-term capital gain. Net them: an $8,000 net long-term capital loss.

You deduct $3,000 against ordinary income this year, reducing your taxable wages. The remaining $5,000 carries into next year, still long-term.¹

The pattern from there:

Year 1: $10,000 loss minus $2,000 gain equals $8,000 net loss. Use $3,000 against wages. Carryforward $5,000.
Year 2 with no gains: use $3,000 against wages. Carryforward $2,000.
Year 3 with no gains: use the last $2,000. Carryforward zero.

If gains appear in Year 2 or 3, the carryforward offsets those gains first, and only the remainder goes against ordinary income. That’s where character matters: a $5,000 long-term carryforward offsetting a long-term gain taxed at 15% saves $750, while $3,000 displacing ordinary income at 24% saves $720. Same loss, different value depending on what it lands against.

How the Business Carryforward Works

Businesses use a separate provision: the net operating loss deduction under Section 172. When deductible expenses exceed gross income for the year, the difference is an NOL. Before the Tax Cuts and Jobs Act of 2017, businesses could carry losses back to prior profitable years and claim a refund. The 2017 law eliminated most carrybacks and replaced them with indefinite carryforwards for losses arising after December 31, 2017.³

The trade for unlimited carryforward years is an annual cap. For losses arising after 2017, the NOL deduction can’t exceed 80% of taxable income for the year (computed before the NOL deduction). A business always pays tax on at least 20% of its income no matter how large the accumulated loss.³

A Worked Example for a Business NOL

A manufacturing startup spends heavily on equipment and research in Year 1, producing a $100,000 NOL. In Year 2 it earns $50,000 in taxable income. The 80% cap is $40,000. The company deducts $40,000 of the prior loss, pays tax on the remaining $10,000, and carries $60,000 forward.³

In Year 3 the company earns $100,000. The 80% cap is $80,000, but only $60,000 of carryforward remains. Since $60,000 is under the cap, the full amount is deductible. Tax is owed on $40,000. Carryforward: zero.

Year 1: $100,000 NOL. No income. Full $100,000 carries forward.
Year 2: $50,000 income times 80% is $40,000 allowed. Tax on $10,000. Carryforward $60,000.
Year 3: $100,000 income times 80% is $80,000 cap. Deduct remaining $60,000. Tax on $40,000. Carryforward zero.

The 80% rule stretches things for a business that barely returns to profit. A company earning $20,000 a year after a $100,000 loss can only deduct $16,000 annually, spreading the carryforward across more than six years.

How the Wash Sale Rule Can Erase a Carryforward You Expected

The wash sale rule under Section 1091 can quietly reshape a capital loss carryforward. Sell a stock at a loss and buy the same or a substantially identical security within 30 days before or after the sale, and the IRS disallows the loss for that tax year. You don’t lose the economic benefit forever, but you don’t get the deduction when you planned.⁴

The disallowed loss gets added to the cost basis of the replacement security. Sell 100 shares at a $2,000 loss, repurchase them for $6,000 inside the window, and your new basis becomes $8,000. When you eventually sell the replacement shares, the higher basis reduces your taxable gain or increases your deductible loss. The original holding period tacks onto the replacement shares.⁴

What this means for the carryforward: a wash sale triggered in December while harvesting losses doesn’t show up on this year’s return, and it isn’t available to roll forward either. It’s baked into the basis of the new position. Wait at least 31 days before repurchasing, or buy a different security that isn’t substantially identical. The IRS decides “substantially identical” on the facts and circumstances, though stocks of different companies are generally not treated as substantially identical.⁵

Section 382 Can Cap a Business Carryforward After an Ownership Change

Businesses sitting on large NOLs need to watch Section 382. It caps how much of a pre-change loss a company can use after a significant ownership change. An ownership change happens when one or more shareholders who each hold at least 5% of the company increase their combined stake by more than 50 percentage points over a rolling three-year testing period. Mergers, acquisitions, and large equity raises can each trigger it.⁶

Once triggered, the annual amount of pre-change NOL usable is capped at the value of the old loss corporation multiplied by the federal long-term tax-exempt interest rate. A $5 million company at a 4% rate can use only $200,000 of pre-change NOLs per year no matter how profitable it becomes. Unused portions of the annual cap roll forward, but the ceiling can strip a large carryforward of much of its apparent value.⁶

Raising venture capital, taking on a new majority partner, or selling the company can inadvertently cap the NOL a founder has been counting on. An acquiring company may find that $10 million in target carryforwards is worth a small fraction of face value.

Section 1244 Can Bypass the $3,000 Cap for Small Business Stock

Most stock losses are capital losses stuck behind the $3,000 annual ceiling against ordinary income. Section 1244 carves out an exception for qualifying small business stock. If your stock qualifies, losses are ordinary rather than capital, up to $50,000 per year for single filers or $100,000 for married couples filing jointly.⁷

Ordinary treatment means the loss offsets ordinary income with no cap beyond those dollar limits. That compares against years of $3,000 annual deductions to absorb the same amount under regular capital loss rules. Anything above the Section 1244 limits reverts to capital loss treatment and follows the standard carryforward rules.

To qualify, the stock must meet several requirements:⁷

The company must be a U.S. corporation.
The corporation’s total capital (money and property received for stock, capital contributions, and paid-in surplus) cannot exceed $1 million when the stock was issued.
The corporation must have derived more than 50% of its gross receipts from active operations rather than passive sources like dividends, rents, or royalties during the five years before the loss.
You must have acquired the stock directly from the corporation for money or property. Stock received as compensation or bought on the secondary market doesn’t qualify.

If you invested in a friend’s startup that collapsed, this provision could let you deduct up to $50,000 against your salary in a single year rather than $3,000 at a time for the next 17. The catch is that the stock has to have been structured correctly from the beginning.

What Happens to a Carryforward When You Die

A capital loss carryforward is personal to the taxpayer who sustained it. Unused amounts can still be claimed on the final joint return for the year of death. Whatever remains after that final return is permanently lost. The carryforward doesn’t pass to the estate, heirs, or surviving spouse.

One partial exception applies to married couples. If the asset that generated the loss was jointly owned, half of the remaining carryforward is allocated to each spouse. The survivor keeps their half and continues carrying it forward. If the asset was solely owned by the spouse who died, the entire carryforward disappears after the final joint return.

Anyone sitting on a large balance should think about the pace of use. A $50,000 unused capital loss with no gains in sight takes more than 16 years to absorb at $3,000 a year. If health is a concern, realizing capital gains to absorb the carryforward sooner preserves tax value that would otherwise vanish.

How to Calculate and Report Your Carryforward

Individual investors compute their carryforward using the Capital Loss Carryover Worksheet in the IRS instructions for Schedule D (Form 1040). The worksheet nets short-term and long-term gains and losses, applies the $3,000 deduction, and produces the amount that carries into the following year, split into short-term and long-term components. You enter those on lines 6 and 14 of next year’s Schedule D.⁸

You’ll need your prior year’s Schedule D (lines 7, 15, 16, and 21) and prior year’s Form 1040 line 15 (taxable income). Keep records of every capital asset sale, including purchase dates, sale dates, and amounts. A brokerage year-end 1099-B has most of it, but confirm against your own records because brokers sometimes report incorrect cost basis.

Business NOL Tracking

No single IRS form tracks NOL carryforwards year to year. Corporations report the NOL deduction on Form 1120 and keep their own records of the remaining balance. IRS Publication 536 lays out the calculation for both the NOL amount and the carryforward. Individuals and estates with NOLs from sole proprietorships or other pass-through activities use the same publication.⁹

A common mix-up: Forms 1045 (individuals, estates, and trusts) and 1139 (corporations) apply for a quick refund from carrying a loss back to a prior year. They don’t track carryforwards.¹⁰ Since carrybacks were mostly eliminated for losses arising after 2017, those forms rarely apply outside specific exceptions such as farming losses.

1
Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
2
Office of the Law Revision Counsel. 26 USC 1212 – Capital Loss Carrybacks and Carryovers
3
Office of the Law Revision Counsel. 26 USC 172 – Net Operating Loss Deduction
4
Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities
5
Internal Revenue Service. Publication 550 – Investment Income and Expenses
6
Office of the Law Revision Counsel. 26 USC 382 – Limitation on Net Operating Loss Carryforwards and Certain Built-In Losses Following Ownership Change
7
Office of the Law Revision Counsel. 26 USC 1244 – Losses on Small Business Stock
8
Internal Revenue Service. Instructions for Schedule D (Form 1040) – Capital Gains and Losses
9
Internal Revenue Service. About Publication 536, Net Operating Losses (NOLs) for Individuals, Estates, and Trusts
10
Internal Revenue Service. About Form 1045, Application for Tentative Refund