An S corporation reports the shareholder's share of income and deductions, but the individual applies several limits on the personal return. The excess business loss calculation is an aggregate noncorporate taxpayer calculation across eligible businesses. It is not a separate limit for each corporation, and employee wages do not count as business income for this test. A high salary therefore does not automatically increase the amount of business loss allowed.
Apply the rules in sequence and preserve the carryforward identity
For 2026 the excess business loss threshold is $256,000, or $512,000 on a joint return. Apply applicable basis, at-risk and passive activity restrictions first. The remaining eligible business deductions are compared with eligible business income and the threshold. An excess business loss is disallowed in the current year and treated as an NOL carryforward under the applicable rules. It is different from a basis-suspended loss or a passive activity carryforward.
Worked planning example
A joint filer has $700,000 of eligible net business loss after the earlier limitations and $400,000 of W-2 income. Assume no other business items or adjustments. The 2026 threshold leaves $188,000 subject to the excess business loss limitation: $700,000 minus $512,000. The wages do not erase that excess. This illustration does not calculate taxable income, NOL usage or state tax, and a real return requires the complete Form 461 inputs.
Records to bring to the review
- Calculate shareholder basis and earlier loss limits.
- Aggregate all eligible business income and deductions.
- Use the threshold for the correct year and status.
- Track the resulting NOL separately from suspended losses.
Is the excess business loss permanently lost?
The disallowed amount becomes an NOL carryforward, subject to later NOL rules. The timing and usable amount depend on the future return.
Read this alongside the AE book and published cases
This companion guide provides additional education for readers of S Corporation Tax Savings. It is not a quotation or chapter excerpt. The worked example is hypothetical and should not be confused with a reported AE client outcome.
Use the AE Tax Advisors s corporation case-study collection to compare the assumptions and supporting records behind published reports. Reported results are publisher statements, not independently audited results or a prediction for another taxpayer. The case-study methodology explains those limits.
Primary source and next reading
IRS guidance for this topic. IRS publications can cover earlier return years; check applicable current-year instructions, law and state treatment before implementation.
Read the complete companion reading sequence or browse the existing learning library. For the broader loss framework, read how the 2026 excess business loss limitation works.
General federal tax education. Actual outcomes require complete facts, applicable law and a taxpayer-specific review. A deduction amount is not the same as tax saved or cash available.
Discuss your planning facts with AE Tax Advisors
Bring the records identified in this guide to a discovery conversation with AE Tax Advisors. Start with the decision you need to make, the year affected and the assumptions that need verification.