Schedule C Loss Limit: At-Risk, Passive, and Excess Business Rules

The Schedule C loss limit isn’t one rule but three, applied in a fixed order: the at-risk limitation, the passive activity loss rules, and the excess business loss cap. For 2026, that last cap is the one most sole proprietors run into if their loss is large — it prevents you from deducting more than $256,000 in net business losses against non-business income on a single return, or $512,000 on a joint return.¹ Any loss that fails one of the three tests doesn’t disappear; it gets suspended and carried forward under that test’s own rules. And before any of these limits apply, the IRS can throw out the loss entirely if it decides your activity isn’t really a business.

Start With the Number on Line 31

Every limitation works off the same starting figure: the profit or loss on Line 31 of Schedule C, which is your gross income minus all ordinary and necessary business expenses.² A loss flows to Schedule 1 (Form 1040), Part I, Line 3 as a negative number.³ Schedule C itself won’t show any reduction from the limitation rules. The Schedule C instructions flag that business loss limits may apply but leave the adjustments to other forms.

The Hobby Rule Comes First

If the IRS decides your activity lacks a genuine profit motive, it can reclassify it as a hobby under Section 183. That doesn’t just cap the loss; it wipes it out. You’d still report any income the activity generates, but you couldn’t use expenses to create a deductible loss.

There’s a safe harbor. Your activity is presumed to be a real business if it shows a profit in at least three of the last five tax years, including the current year. Horse breeding, training, showing, and racing get a longer window: two profitable years out of seven.⁴ Miss the presumption and the IRS weighs nine factors from the Treasury Regulations, including whether you run the activity in a businesslike manner, your expertise, the time you put in, your income and loss history, and how much personal recreation is baked in.⁵ No factor decides it alone, but activities like dog breeding, farming, auto racing, and collecting draw the most scrutiny.

The At-Risk Limit

The first of the three formal caps is the at-risk rule under Section 465.⁶ You can only deduct a loss up to the amount you could actually lose economically. This test runs before the passive activity rules.⁷

Your at-risk amount is the cash you’ve put in, the adjusted basis of any property you’ve contributed, and borrowed money for which you are personally liable. A standard commercial loan you personally guaranteed counts. What doesn’t count is nonrecourse debt, where the lender’s only remedy is the collateral.⁸ Real estate gets one carve-out: qualified nonrecourse financing from a bank or government entity, secured by the real property itself and with no one personally liable, does count toward at-risk basis.⁹

For most sole proprietors funded by personal savings and standard bank loans, this rule rarely bites. It matters more for businesses using complex financing structures. Any loss above your at-risk amount is suspended on Form 6198 until you increase your basis by contributing more capital or by converting nonrecourse debt to recourse debt.¹⁰

The Passive Activity Rules

The second hurdle is Section 469, which blocks losses from a business you don’t actively run from offsetting wages, salary, or investment income.¹¹ Your Schedule C is passive only if you fail to “materially participate.” Most owners who work in their business day-to-day clear this without difficulty.

There are seven material participation tests, and satisfying any one is enough. The cleanest is working more than 500 hours in the activity during the year. Others include doing substantially all the work in the activity, or working more than 100 hours when no one else worked more than you did. If you run several businesses, you can combine hours across all “significant participation activities” to hit 500. History counts too: material participation in any five of the prior ten years satisfies the test, and for personal service fields like law, medicine, and consulting, three prior years is enough.⁷

Fail all seven and the loss is suspended on Form 8582. It can then offset only income from other passive activities, not wages or investment returns. The suspended amount sits there until you generate enough passive income to absorb it, or until you sell your entire interest in a fully taxable transaction to an unrelated party, at which point every accumulated suspended loss releases at once.¹²

The Excess Business Loss Cap

The third limit is the excess business loss rule under Section 461(l), and it’s the one with the fixed dollar ceiling.¹³ The rule had been set to expire after 2028, but the One Big Beautiful Bill Act (P.L. 119-21), signed in July 2025, made it permanent.¹⁴

For 2026, the threshold is $256,000 for single filers and $512,000 for joint filers.¹ Those numbers are noticeably lower than the 2025 thresholds of $313,000 and $626,000 because the new law reset the inflation adjustment formula. Future annual adjustments continue, but from this lower baseline.

Unlike the first two tests, this one aggregates. Your Schedule C, partnership, and S corporation activities all get combined into one net business loss figure, calculated after the at-risk and passive activity rules have already been applied to each activity. If the combined net loss beats the threshold for your filing status, the excess is your “excess business loss” and gets disallowed for the year. The calculation is reported on Form 461.¹⁵

Say a married couple filing jointly has an aggregated net business loss of $700,000. Their excess business loss is $188,000, the amount above the $512,000 threshold. That $188,000 can’t reduce their wages or investment income for 2026. It moves to next year instead.

Where Disallowed Losses Go

Each type of suspended loss carries forward on its own track, and the path back to a deduction is different for each.

A loss stopped by the at-risk rules stays on Form 6198 until you increase your at-risk basis. Add more capital, or take on debt for which you become personally liable, and the suspended amount becomes deductible in the year your basis catches up.¹⁰

A loss stopped by the passive activity rules stays on Form 8582 until you generate passive income to absorb it, or until you fully dispose of your interest through a taxable sale to an unrelated buyer. Selling to a family member doesn’t trigger the release; the suspended losses stay with you until that family member later sells to someone unrelated. Gifting the activity doesn’t release them either. Instead, the suspended amount is added to the recipient’s basis in the property.¹²

An excess business loss is treated as a net operating loss (NOL) carried forward to future years.¹⁶ Once it becomes an NOL carryforward, it can offset only up to 80% of taxable income in any future year, under Section 172.¹⁷ You’ll always owe tax on at least 20% of taxable income in a year you use this carryforward, no matter how large the accumulated NOL.

Side Effects Worth Knowing

The QBI Deduction Shrinks or Disappears

The Section 199A qualified business income (QBI) deduction, worth up to 20% of net income from a qualifying pass-through business, interacts with Schedule C losses in a way that surprises people. A net loss on Schedule C reduces total QBI. If your overall QBI across all businesses is negative, you get no QBI deduction for the year.¹⁸

Losses suspended by any of the three limits don’t hit QBI in the year they’re suspended. They hit later, in the year the loss is actually allowed into taxable income. When that happens, the qualifying portion becomes a QBI loss carryforward treated as coming from a separate business, even if the original business is gone.¹⁸ A net QBI loss that carries forward will then offset QBI from profitable businesses in later years, cutting or eliminating the deduction those years.¹⁹

Social Security Credits Stop Accruing

A Schedule C loss drops your net self-employment earnings to zero, so you owe no self-employment tax for the year. The trade-off is that you earn no Social Security credits for that year either.

In 2026, one Social Security credit takes $1,890 in net self-employment earnings, and the maximum four credits for the year take $7,560. You generally need 40 credits, roughly ten years of work, to qualify for retirement benefits. Repeated loss years can create gaps that lower your future benefit or delay eligibility. If you’re regularly self-employed and earnings are too low to generate credits, an optional reporting method may let you count some earnings anyway. For non-farm income, the method is available up to five times over a lifetime, and you need net earnings of at least $400 in two of the three prior years to use it.²⁰

1
Internal Revenue Service. Rev. Proc. 2025-32
2
Internal Revenue Service. Instructions for Schedule C (Form 1040)
3
Internal Revenue Service. Schedule 1 (Form 1040)
4
Internal Revenue Service. Is Your Hobby a For-Profit Endeavor?
5
Internal Revenue Service. Activities Not Engaged in for Profit Audit Technique Guide
6
Office of the Law Revision Counsel. 26 U.S. Code 465 – Deductions Limited to Amount at Risk
7
Internal Revenue Service. Publication 925 – Passive Activity and At-Risk Rules
8
Internal Revenue Service. Instructions for Form 6198 – At-Risk Limitations
9
eCFR. 26 CFR 1.465-27 – Qualified Nonrecourse Financing
10
Internal Revenue Service. Instructions for Form 6198 – At-Risk Limitations
11
Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited
12
Internal Revenue Service. Instructions for Form 8582 – Passive Activity Loss Limitations
13
Office of the Law Revision Counsel. 26 U.S. Code 461 – General Rule for Taxable Year of Deduction
14
Internal Revenue Service. Instructions for Form 461 – Limitation on Business Losses
15
Internal Revenue Service. About Form 461 – Limitation on Business Losses
16
Internal Revenue Service. Excess Business Losses
17
Office of the Law Revision Counsel. 26 U.S. Code 172 – Net Operating Loss Deduction
18
Internal Revenue Service. Instructions for Form 8995
19
Internal Revenue Service. Instructions for Form 8995-A
20
Social Security Administration. If You Are Self-Employed