STR Loss Limitations: Basis, At Risk, Passive Activity and Excess Losses

By AE Tax Advisors · Published 2026-08-11 · Updated November 8, 2026.

A short-term rental can satisfy material participation and still produce a suspended or deferred deduction. Model each applicable limitation before comparing the tax benefit with the purchase price or cost of a study.

Start with the applicable basis limitation

Partnership losses face the outside-basis rules, while S corporation losses depend on shareholder stock and qualifying debt basis. Direct ownership is different: property basis determines depreciation, but it is not the same as a shareholder or partner loss-basis test.

A partnership liability allocation can affect outside basis, subject to the applicable rules. Corporate bank debt does not automatically create S corporation shareholder debt basis. A personal guarantee alone ordinarily does not establish that basis.

Calculate the amount at risk separately

Basis and at-risk amounts can differ. Cash investment and certain borrowing can count, but nonrecourse debt generally requires an exception. Qualified nonrecourse financing for holding real property has conditions involving the security, lender and financing terms. Do not assume every mortgage qualifies.

Apply passive-activity rules

An average customer-use period of seven days or less is one exception to the rental-activity definition. It does not by itself establish material participation. Keep records that support the relevant test, including work by other individuals when that test requires a comparison.

A nonpassive classification addresses Section 469. It does not override basis, at-risk or other loss limits. Existing passive carryforwards also require separate analysis when participation changes.

Apply the excess business loss limitation

For an applicable noncorporate taxpayer, Section 461(l) limits aggregate business losses after the other relevant limitations. Use the current Form 461 instructions and the correct tax year's threshold. Employee wages are excluded from business income for this computation.

The disallowed excess is generally treated as a net operating loss carryforward under the applicable rules. It is different from a passive-activity carryforward and should be tracked separately.

Use a limitation worksheet rather than a headline deduction

For example, an S corporation shareholder might have enough property-level depreciation but insufficient shareholder basis. Even after that issue is resolved, at-risk and other limits may still apply. A partnership structure does not establish that the entire loss is deductible either.

Request an STR loss review with ownership records, debt documents, activity logs, prior carryforwards and the proposed depreciation schedule.

Frequently Asked Questions

Sources and review notes

Reviewed November 8, 2026 by AE Tax Advisors. Examples are illustrative; apply the rules to the relevant tax year and records. See our editorial policy.

• IRS Publication 925: at-risk and passive-activity rules
• IRS Form 461 instructions
• IRS Form 7203 instructions