A loss on your Schedule K-1 can offset ordinary income like wages, interest, and self-employment earnings, but only if it survives a strict sequence of limitations. K-1 losses from a partnership or S corporation must clear three tests in order — basis, at-risk, and passive activity — before they touch a dollar of your other income, and high earners face a fourth cap on top. Most K-1 losses get stuck at the passive activity stage, and the ones that keep moving usually do so because the owner materially participates in the business or qualifies under a real estate exception.
The Three Tests Every K-1 Loss Must Clear
A partnership or S corporation pays no income tax itself. It passes its results through to owners on Schedule K-1, and you report your share on Form 1040. Before any loss reduces your other income, the IRS runs it through three filters in a fixed order. A loss blocked at an earlier stage never reaches the later ones.
Basis
You cannot deduct more than your adjusted basis in the entity. For partnerships, this rule comes from IRC Section 704(d). For S corporations, IRC Section 1366(d) imposes the same cap, limiting deductible losses to the combined adjusted basis of your stock and any loans you have personally made to the corporation.
Your basis starts with whatever cash or property you contributed. It goes up when the entity earns income allocated to you and, for partnerships, when your share of entity liabilities increases. It goes down when you take distributions and when you claim your share of losses and nondeductible expenses. It can never fall below zero.
S corporation owners get tripped up by the debt component. Only direct loans from you to the corporation add to your debt basis. Guaranteeing a bank loan the corporation takes out does not. Partnership basis is more generous: your share of entity-level debt, including debt you did not personally guarantee, generally counts.
Losses blocked here do not disappear. They carry forward indefinitely and become deductible whenever your basis recovers through new contributions or future income.
At-Risk
Losses that clear basis then face IRC Section 465. The at-risk rules ask something narrower: how much would you actually lose out of pocket if the business collapsed? Your at-risk amount covers cash you contributed, the adjusted basis of property you put in, and borrowed amounts for which you are personally liable or have pledged other property as collateral.
Nonrecourse debt is where at-risk and basis diverge. A nonrecourse loan lets the lender seize only specific collateral on default. For partnership basis, your share of nonrecourse debt increases basis. For at-risk purposes, it generally does not, because you are not personally on the hook. A partner can have plenty of basis and still fail this test.
There is a carve-out. Qualified nonrecourse financing secured by real property used in the activity does count toward your at-risk amount, provided the loan comes from a bank, government entity, or other qualified lender and no one is personally liable. Losses blocked here carry forward and become deductible when your at-risk amount goes back up. You report the calculation on Form 6198.
Passive Activity
This is where most K-1 losses stop. Under IRC Section 469, losses from passive activities can only offset income from other passive activities. They cannot reduce wages, salaries, interest, dividends, or other nonpassive income. A passive activity is any trade or business in which you do not materially participate.
That single test separates investors from operators. If you are a silent partner collecting K-1s from a business someone else runs, your losses are passive and blocked from touching your W-2. If you run the business, your losses may be nonpassive and free to offset ordinary income (assuming they cleared the first two tests).
When Passive Becomes Nonpassive: Material Participation
The IRS regulations give seven ways to establish material participation. Meeting any one is enough:
- More than 500 hours in the activity during the year.
- Your participation is substantially all the participation by everyone involved.
- More than 100 hours, and no one else participated more than you.
- Multiple significant participation activities of more than 100 hours each, totaling more than 500 hours.
- Material participation in the activity for any five of the ten preceding years.
- A personal service activity in which you materially participated in any three preceding years.
- Facts and circumstances showing regular, continuous, and substantial participation. Participation of 100 hours or less does not qualify under this test.
The 500-hour test is the easiest to prove. Roughly 10 hours a week year-round clears it. The facts-and-circumstances route invites IRS scrutiny and offers no bright line above the 100-hour floor.
Limited partners face tighter rules. The IRS presumes a limited partner is not materially participating, and only three tests are available to them: the 500-hour test, the five-of-ten-years test, and the personal service activity test. Many syndicated real estate and fund K-1s come as limited partnership interests, and those investors almost never log the hours needed.
Real Estate Exceptions That Reach Ordinary Income
Rental real estate is treated as passive by default, even when you actively manage it. Two carve-outs in Section 469 let rental losses reach nonpassive income anyway.
The $25,000 Allowance
If you actively participate in a rental real estate activity, you can deduct up to $25,000 of passive rental losses against nonpassive income each year. Active participation is a lower bar than material participation: own at least 10% of the property and be involved in management decisions like approving tenants, setting rental terms, or authorizing repairs. Day-to-day operations are not required.
The allowance phases out as income climbs. For every dollar of modified adjusted gross income above $100,000, the allowance drops by 50 cents, disappearing completely at $150,000 of MAGI. Limited partners cannot use this exception at any income level.
Real Estate Professional Status
The bigger break is qualifying as a real estate professional. If you meet the standard, your rental real estate activities are no longer passive, and your K-1 rental losses can offset wages, business income, and anything else without a dollar cap (assuming basis and at-risk are satisfied).
You must meet two tests every year. First, more than half of all personal services you perform across every trade or business must be in real property businesses in which you materially participate. Second, you must log more than 750 hours in those real property businesses. Real property businesses include development, construction, acquisition, rental, management, and brokerage.
For married couples filing jointly, only one spouse needs to satisfy both tests, and spouses cannot combine hours to reach the thresholds. If one spouse has a full-time job outside real estate, that spouse almost certainly fails the “more than half” test, so the other spouse must independently qualify.
The High-Income Cap on Business Losses
Even after a loss clears basis, at-risk, and passive activity, high earners hit one more limit. IRC Section 461(l) caps the total business losses a noncorporate taxpayer can deduct in a single year. For 2026, the threshold is $256,000 for single filers and $512,000 for joint filers. Losses above those figures are reclassified as a net operating loss carryforward rather than a current deduction.
The calculation compares your aggregate business deductions to your aggregate business income. Excess loss gets pushed to the following year as an NOL. You report it on Form 461, filed with your Form 1040. The thresholds adjust for inflation each year. This limitation was made permanent by legislation enacted in 2025 and applies to tax years beginning after December 31, 2025.
What Happens to Losses You Cannot Deduct
Blocked losses are suspended, not lost. Basis-limited losses carry forward until your basis recovers. At-risk losses carry forward until your at-risk amount goes up. Passive losses carry forward until you have passive income to soak them up, or until you dispose of the activity.
The disposition rule is the reliable exit. Under IRC Section 469(g), when you dispose of your entire interest in a passive activity in a fully taxable transaction to an unrelated buyer, all accumulated suspended passive losses from that activity are released and treated as nonpassive. They can then offset any type of income, including wages.
Three conditions matter. The sale must be fully taxable, so all gain or loss is recognized. Like-kind exchanges and contributions to another entity do not trigger the release. The buyer must be unrelated. And you must dispose of your entire interest; a partial sale does not free the suspended losses.
If the sale itself produces a capital loss, the normal $3,000 annual capital loss cap still applies, but the excess carries forward as an ordinary capital loss no longer subject to the passive rules.
Records You Need to Defend the Deduction
Every one of these limitations requires numbers the IRS cannot verify without your records. The burden of proof is on you.
For basis, keep a running annual calculation showing starting basis, additions from income and contributions, and reductions from distributions and losses. S corporation shareholders should track stock basis and debt basis separately. No IRS form does this for you.
For material participation, contemporaneous logs beat reconstructions built after an audit notice. Entries should carry specific dates, start and end times, and descriptions of what you did. “Managed properties — 8 hours” is far weaker than “reviewed three tenant applications for Unit 4B at 123 Main St; called references for top candidate — 2.5 hours.” The regulation allows any reasonable method, but specificity and timing carry the day in disputes.
For at-risk, keep copies of loan agreements, personal guarantees, and any changes to financing. Report the at-risk calculation on Form 6198 and passive activity limitations on Form 8582. File both whenever they apply, and retain prior-year copies to support suspended loss carryforwards you claim in a later disposition year.