How Does the Excess Business Loss Limitation Work in 2026?
Loss limitations for business owners and real estate investors.
The short answer
The excess business loss rule limits how much a noncorporate taxpayer can deduct when aggregate business deductions exceed aggregate business income and gains. The excess is deferred as a net operating loss carryforward. For 2026, the threshold is $256,000 for non-joint returns and $512,000 for joint returns.
By AE Tax Advisors Team. Published . Updated .
A business loss and an excess business loss are different
A business can report a legitimate tax loss without producing an excess business loss on its owner’s return. Section 461(l) asks a second question: after combining the owner’s qualifying business activity, how much of the net loss exceeds the annual threshold? It applies to noncorporate taxpayers, including individual owners of sole proprietorships, partnerships and S corporations. A C corporation is outside this particular rule.
This is a limit on the current deduction, not a tax rate or a cap on the amount a business can lose. It also does not give each LLC its own allowance. On a joint return, both spouses’ qualifying business items enter one calculation.
Use the threshold for the correct tax year
| Tax year | Non-joint returns | Joint returns |
|---|---|---|
| 2025 | $313,000 | $626,000 |
| 2026 | $256,000 | $512,000 |
The 2025 legislation made the limitation permanent and changed the inflation-adjustment framework used for 2026. Do not carry the 2025 amount into a 2026 projection. A return filed in 2026 for tax year 2025 still uses the 2025 rules. Revenue Procedure 2025-32, section 4.31, supplies the 2026 amounts.
The simplified calculation
Excess business loss = the greater of zero or qualifying business deductions minus qualifying business income and gains minus the applicable threshold. This summary assumes the earlier loss limitations have already been applied. Form 461 contains adjustments that a simple profit-and-loss statement does not capture.
Employee compensation, including W-2 wages, is excluded from the business-income side of this calculation. NOL and Section 199A deductions are also excluded when figuring business deductions. Capital asset losses are excluded, and business capital gains enter under a specific statutory limit. Portfolio income does not become business income simply because it appears on the same return.
Example: a joint filer with two businesses
Assume a married couple filing jointly in 2026 has a $900,000 allowable loss from Business A and $200,000 of qualifying net income from Business B. Their aggregate net business loss is $700,000. Subtracting the $512,000 threshold produces a $188,000 excess business loss. The Section 461(l) adjustment leaves a $512,000 net business loss for the current return, subject to the rest of the return calculation.
If Business B instead produces $500,000 of qualifying net income, the aggregate loss becomes $400,000. That is below the joint threshold, so this example has no excess business loss. The rule aggregates income as well as losses. Neither result is a promise of a specific refund.
Apply the other limitations first
For pass-through owners, review basis, then the at-risk rules, then passive activity restrictions, and then Section 461(l). A loss suspended for insufficient basis or under the passive activity rules is not automatically an NOL. Track each limitation separately so a future release goes through the remaining rules correctly.
What happens to the deferred amount?
The disallowed excess is treated as an NOL carryforward for subsequent years. Modern NOL carryforwards generally face an 80% limitation based on specially computed taxable income. The excess-business-loss threshold and the NOL limit are separate tests applied at different stages.
What to review before year-end
Prepare one schedule covering every qualifying business, both spouses if filing jointly, projected depreciation and losses released from earlier years. Reconcile it to basis schedules, participation records and prior carryforwards. Then compare current tax, future NOL use and cash needs. A large deduction can be valid while its immediate tax benefit is much smaller than the headline amount.
Frequently Asked Questions
Is the limit per business?
No. It applies to aggregate qualifying business items at the taxpayer level, including both spouses on a joint return.
Is the deferred deduction lost forever?
The excess becomes an NOL carryforward. Its future use depends on the NOL rules and the taxpayer’s later income.
Does a profitable business avoid the rule?
Its income enters the aggregate calculation, but the owner can still have an excess loss if other qualifying businesses produce larger losses.
Primary sources and scope
- IRS Instructions for Form 461 (2025): definition, employee-income exclusion and ordering rules
- IRS Revenue Procedure 2025-32, section 4.31: 2026 thresholds
- IRS Publication 925: passive activity and at-risk rules
- IRS Instructions for Form 172: NOL calculations and carryforwards
- IRS: S corporation shareholder loss limitations
Sources checked September 30, 2026. The 2025 Form 461 instructions explain the framework; Revenue Procedure 2025-32 supplies the 2026 threshold. Examples are hypothetical federal income tax illustrations. They omit other deductions, credits, state taxes and special facts unless stated. Read our editorial policy.
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