The short answer
What is the short-term rental tax loophole?
If your rental’s average guest stay is 7 days or less, the IRS doesn’t treat it as a “rental activity” under the passive loss rules. If you also materially participate, its losses are non-passive and can offset W-2 income. A cost segregation study moves 20% to 30% of the building into short-lived property, and since 2025 that property qualifies for 100% bonus depreciation in year one. The result is a large first-year paper loss, even when the property makes money.
The problem
Why most rentals can’t lower a W-2 tax bill
Long-term rentals are passive by default. Their losses can only offset passive income, not your salary. There is a $25,000 allowance for owners who actively participate, but it phases out between $100,000 and $150,000 of income, so most high earners get nothing. The losses just carry forward.
Real estate professional status can fix that, but it takes 750+ hours a year and more than half your working time in real estate. That rules out anyone with a full-time job. The short-term rental rule is the path that still works for a busy W-2 earner.
How it works
The three things that have to be true
| Requirement | What it means | How to prove it |
|---|---|---|
| 1. Short average stay | Average guest stay of 7 days or less for the year (or 30 days or less with hotel-like services). | Total days of all stays ÷ number of stays, from booking platform reports. |
| 2. Material participation | Most owners use one of three tests: 500+ hours; 100+ hours and more than anyone else, including your cleaner and manager; or you do substantially all the work. Spouse hours count. | A written log as you go: date, task, hours. Keep cleaner and manager invoices. |
| 3. In service this year | The home must be ready and available to rent during the tax year, and you must meet the tests that same year. The hour tests are not prorated. | Listing live date, first availability, and your log. |
Hours that don’t count: investor-type work like reviewing statements, and work done mainly to qualify. A full-service property manager usually out-hours the owner and breaks the 100-hour test. That matters in Hawaii, where many resort condos are run by an on-site rental program. Most people using this strategy self-manage or co-host.
The accelerator
Cost segregation and 100% bonus depreciation
Normally a short-term rental building is depreciated over 39 years. Units rented mostly on stays under 30 days are “transient,” which takes them out of the 27.5-year residential category. Using 39 years is the conservative position. Land is never depreciable, and in Hawaii land is often a large share of the price, so get a realistic land value.
A cost segregation study, done by an engineer, breaks out the parts of the property with shorter lives: appliances, flooring, cabinets and fixtures (5 and 7 years), plus fencing, driveways and landscaping (15 years). For single-family rentals that is typically 20% to 30% of the building’s value. Furniture you buy for the rental adds more.
Under the 2025 tax law, property acquired after January 19, 2025 gets permanent 100% bonus depreciation. All of that short-lived property can be written off in the first year. A binding contract signed before January 20, 2025 does not qualify.
Worked example
A $600,000 rental for a couple earning $450,000
A married couple filing jointly earns $450,000 in W-2 wages. They buy a $600,000 short-term rental, put it in service in July 2026, self-manage, log 100+ hours, and average 3-night stays.
| Step | Amount |
|---|---|
| Purchase price | $600,000 |
| Land at 20% (not depreciable) | $120,000 |
| Building basis | $480,000 |
| Cost segregation: 25% reclassified, written off at 100% bonus | $120,000 |
| Remaining $360,000 over 39 years (July start, mid-month) | $4,231 |
| Total first-year depreciation | $124,231 |
| Less rental profit for the partial year | ($15,000) |
| First-year tax loss | ($109,231) |
| Federal tax before (2026 brackets, standard deduction) | $86,608 |
| Federal tax after the loss | $59,253 |
| Estimated federal tax savings | $27,355 |
That loss is well under the 2026 excess business loss limit of $512,000 for joint filers, so it is fully usable this year. The savings are about 25% of the loss, not 32%, because the loss pulls income down through the 32% and 24% brackets. Anyone who quotes a flat top-bracket savings number is overselling it. This depreciation is mostly recaptured if you sell, unless you defer it with a 1031 exchange, so this strategy works best for owners who plan to hold.
Hawaii state tax is different. Hawaii does not adopt federal bonus depreciation (HRS §235-2.4), so your Hawaii return uses regular depreciation. The example above is federal only. Ask your CPA what the state side looks like for you.
Run your numbers
Short-term rental tax savings calculator
A rough first-year federal estimate using 2026 brackets and the standard deduction. It assumes you meet the 7-day and material participation tests. Your CPA makes the final call.
Estimate only. Excludes Hawaii state tax, GET and TAT, closing costs, and recapture on sale. Not tax advice.
The mortgage side
How to finance a short-term rental the right way
| Option | Down payment | Good fit when |
|---|---|---|
| DSCR loan | Typically 20–25% | You qualify on the property’s projected rental income, not your tax returns. Can close in an LLC. Useful because the write-off itself lowers your taxable income on paper. |
| Conventional investment loan | Typically 15–25% | Strong W-2 income and you want the lowest rate. Your returns are used to qualify. The building must be warrantable. |
| Condotel loan | Typically 25–35% | Hotel-zoned Waikiki or resort units with a front desk or rental program. Most banks won’t lend on them; I shop lenders that do. |
| Second-home loan | As little as 10% | Only if it is truly your second home. It can’t be run as a full-time rental, and misstating occupancy is mortgage fraud. I’ll tell you straight which one fits. |
Timing matters. To claim the loss for a tax year, the home has to be closed and ready to rent in that year. December closings are tight: start the loan in the fall.
Hawaii rules
Where you can legally run a nightly rental in Hawaii
The tax strategy only works if the county lets you rent by the night. Hawaii is one of the strictest places in the country, and a 30-day minimum stay fails the 7-day test. Check the exact address and its zoning before you write an offer.
| County | What to know before you buy |
|---|---|
| Oahu (Honolulu) | Stays under 30 days are only legal in resort-zoned areas (Waikiki, Ko Olina, Turtle Bay and Hoakalei), for registered transient vacation units, and for the few homes holding a pre-1986 nonconforming use certificate. Ordinance 22-7 set a 90-day minimum elsewhere; a federal court protected some existing 30-to-89-day rentals, but neither path passes the 7-day test. Registration requires $1,000,000 of liability coverage, and every ad must show the registration number and TMK. |
| Maui County | Bill 9 (2025) ends transient vacation rentals in apartment-zoned districts, including Minatoya-list condos: West Maui by January 1, 2029 and the rest of the county by January 1, 2031. Lawsuits are pending. Hotel- and resort-zoned units and permitted short-term rental homes are not affected. Don’t buy an apartment-district condo for this strategy. |
| Hawaii County (Big Island) | Short-term rentals are allowed in resort, hotel and some commercial and multifamily zones. Most residential and agricultural areas require a nonconforming use certificate for a rental that was operating before the 2019 rules. |
| Kauai | Vacation rentals are largely limited to Visitor Destination Areas. Outside them, only homes with a valid nonconforming use certificate can operate, and the county revokes permits for violations. |
Hawaii taxes nightly rentals heavily: the state transient accommodations tax rose to 11% on January 1, 2026, plus a 3% county TAT and general excise tax (4.5% on Oahu). Build those into your cash flow. Act 17 (2024) also gives every county the power to phase out short-term rentals, so buy where nightly use is zoned, not just tolerated.
Read this before you buy
Where people get burned
| Pitfall | What to do |
|---|---|
| The condo’s rental program logs more hours than you | Self-manage or co-host, and keep invoices showing their hours. Their hours are not your hours. |
| Buying where nightly rentals aren’t legal | Confirm zoning and registration for the exact unit. A 30-day minimum kills the strategy. |
| Logs rebuilt at tax time | Track hours as you go: date, task, time. |
| Average stay calculated wrong | Divide total days by number of stays, using stays that ended in the year. Not nights booked. |
| Too many personal days | Using it yourself for more than the greater of 14 days or 10% of the days it’s rented at a fair price makes it a residence under IRC §280A and limits deductions. |
| A cheap or unsupported cost seg study | Use an engineering-based study that will hold up in an audit. |
| Forgetting recapture | Short-lived components are recaptured as ordinary income when you sell. Plan to hold, or plan a 1031 exchange. |
| Buying a bad rental for the tax break | The write-off is a bonus, not a business plan. Run the cash flow first, including TAT, GET and HOA dues. |
For CPAs and accountants
Partner with me on client education
I’m working with CPAs and accountants on co-hosted webinars that teach this strategy to high-income clients. If your firm handles cost segregation or short-term rental returns and wants to co-brand an event, send me a note or book a call.
Common questions
STR Tax Strategy FAQ
Can short-term rental losses offset my W-2 income?
They can, if the average guest stay is 7 days or less (or 30 days or less with hotel-like services) and you materially participate, usually 100+ hours and more than anyone else. Then the losses are non-passive and can offset wages. Confirm with your CPA.
Do I have to quit my job or be a real estate professional?
No. That is the point of this strategy. Real estate professional status needs 750+ hours and more than half your working time. The short-term rental rule only needs material participation in the rental itself.
Does my spouse’s time count?
Yes. For material participation, a spouse’s hours count toward the test, even if the spouse is not on the title.
Is 100% bonus depreciation still available?
Yes. The 2025 tax law made 100% bonus depreciation permanent for property acquired after January 19, 2025. Hawaii does not follow it on the state return.
Can I do this with an Oahu home outside Waikiki?
Usually not. Outside resort zones, Oahu requires stays of 30 days or more for most homes, which fails the 7-day average stay test. Look at resort-zoned condos, condotels or registered units.
What happens when I sell?
Depreciation is recaptured. The short-lived components are taxed as ordinary income, and the rest at up to 25%. A 1031 exchange can defer it.
What loan should I use for a short-term rental?
DSCR if you want to qualify on the rental income or buy in an LLC, conventional if your W-2 income is strong and the building is warrantable, and a condotel loan for hotel-zoned units.
Sources: Treas. Reg. §1.469-1T(e)(3); Treas. Reg. §1.469-5T; IRC §168(k) as amended by Pub. L. 119-21 (2025); Rev. Proc. 2025-32 (2026 brackets); IRC §280A; HRS §235-2.4 (Hawaii decoupling); Honolulu Ordinance 22-7; Maui County Bill 9 (2025); Act 17, SLH 2024; Hawaii Dept. of Taxation. Not tax advice. Richie is a licensed mortgage broker, not a CPA or tax attorney. Talk to a qualified CPA before you buy.
