The short-term rental loophole is the combination of two tax rules that lets a rental property's paper losses offset wage and business income. When a property's average stay is seven days or less it is not a rental activity under the passive activity rules, and when the owner also materially participates the resulting loss is non-passive and usable against W-2 income.
My BnB Accelerator, LLC is a real estate acquisition firm, not a CPA firm. This is a plain English explanation of the mechanics so you can have an informed conversation with a qualified professional. It is not tax advice. See our partner firm, AE Tax Advisors.
The mechanics, in order
- Average stay of seven days or less. This removes the automatic passive classification that applies to rental activities.
- Material participation. Satisfy one of the IRS tests, most commonly more than 100 hours with no other individual participating more, or more than 500 hours.
- A loss worth using. Ordinary depreciation on a $900,000 property is modest. A cost segregation study reclassifies components into 5, 7, and 15-year lives, front-loading a much larger deduction into year one.
- Apply the loss. With the first two conditions met, the loss is non-passive and can offset W-2 and business income in the year it arises.
Why "loophole" is the wrong word
Nothing here is a gap or an oversight. The seven-day rule sits in the regulations under Section 469 and was written deliberately. Cost segregation is a long-established engineering-based method of allocating basis. The provisions are being used exactly as drafted.
The word persists because the outcome surprises people: a real estate purchase reducing tax on salary income runs against the intuition that rental losses are trapped. That intuition is correct for long-term rentals and wrong for short-term ones.
Where it fails in practice
Almost always at step two, and almost always because of a management decision. A full-service property manager's hours count as participation by another individual, which can defeat both the substantially-all test and the 100-hour test. The deduction that justified the purchase disappears for reasons that had nothing to do with the property.
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Frequently asked questions
Is the short-term rental loophole legal?
Yes. It relies on the passive activity regulations under Section 469 and on cost segregation, both long established and used as written. It is not an aggressive position, though it does require the seven-day average and material participation to be genuinely met and documented.
How much can the STR loophole save?
It depends on purchase price and marginal rate. A cost segregation study on a $900,000 property might accelerate $250,000 to $320,000 of depreciation into year one. At a 37% federal marginal rate plus state tax, the reduction can exceed $100,000, though only to the extent you have income to offset.
Does the STR loophole still work in 2026?
The underlying rules are unchanged. What varies year to year is the bonus depreciation percentage, which affects how much of the reclassified basis can be deducted immediately rather than over the accelerated schedule. Confirm the current-year figure with your CPA.
Do I need a cost segregation study to use it?
Not technically, but without one the deduction is usually too small to matter. Standard depreciation spreads a residential building over 27.5 years or a nonresidential one over 39. A study front-loads the components that qualify for much shorter lives.