STR Bonus Depreciation Is Dropping to 20% in 2026. Here Is What Real Estate Investors Need to Do Now.

The Depreciation Rate Is Not Your Biggest Problem

If you own a short-term rental you acquired before January 20, 2025, the bonus depreciation rate on your cost segregation components drops to 20% this year. That is a real number. On a $500,000 property with $125,000 in segregated short-lived assets, the difference between 40% (last year) and 20% (this year) is $25,000 in first-year deductions you are not getting back.

But here is what keeps me up at night (and I say that as someone who reads IRS guidance documents recreationally): the depreciation rate is not the part of this strategy most likely to get you in trouble. The part most likely to get you in trouble is whether you can prove you materially participated in your STR. And the IRS is paying closer attention to that question than it was two years ago.

This article provides general information and should not be construed as legal advice. Consult a qualified attorney in your jurisdiction for advice specific to your situation.

First, the Rate: Where Things Stand After Congress Intervened

The Tax Cuts and Jobs Act created the bonus depreciation schedule most investors memorized like a countdown clock: 100% through 2022, then 80%, 60%, 40%, 20%, and zero. The phase-out was real and it was happening on schedule.

Then the One Big Beautiful Bill Act (OBBBA) was signed into law on July 4, 2025. It permanently restored 100% bonus depreciation for qualifying property acquired after January 19, 2025. The IRS confirmed the mechanics in Notice 2026-11, issued January 14, 2026.

This creates a split that matters for your 2026 return:

• STR acquired after January 19, 2025: You are eligible for 100% bonus depreciation on segregated components. The phase-out does not apply to you.
• STR acquired on or before January 19, 2025: You are still on the original TCJA schedule. That means 20% for property placed in service in 2026, and zero in 2027.

If you bought your STR in 2023 or 2024 and already took the higher rates on your cost segregation study, you are not affected retroactively. The 20% rate applies to any remaining eligible property you place in service this year. If you are planning a new acquisition in 2026, the OBBBA means you get the full 100%. (We covered the rate change in detail in our STR tax loophole guide.)

Either way, the rate is only half the equation. The other half is proving you qualify.

The 7-Day Rule: Why Short-Term Rentals Are Not “Rental Activities”

This is where most generic tax content gets sloppy, so let me be precise.

Under IRC Section 469, rental activities are classified as passive by default. Passive losses can only offset passive income. For a W-2 earner with a rental property generating a $50,000 paper loss from depreciation, that loss is stuck. It sits on your return doing nothing until you sell the property or generate passive income to absorb it.

Short-term rentals are different because of a specific exception in the temporary regulations. Under Treas. Reg. 1.469-1T(e)(3)(ii)(A), an activity is not a rental activity if the average period of customer use is seven days or less. Picture this: you own a beach house that books an average stay of 4.2 nights. That property is not a “rental activity” in the eyes of the IRS. It is a business activity.

This distinction is the entire foundation of what people call the “STR loophole.” It is not a loophole in the sense that anyone is gaming the system. Congress deliberately drew a line between passive rental investors and active business operators. Short-term rentals, by their nature, require hands-on management that long-term leases do not.

Once your STR clears the 7-day average stay threshold, it falls under the general passive activity rules for business activities. And that means the material participation tests apply.

Material Participation: What the IRS Actually Requires

The IRS provides seven tests for material participation under Treas. Reg. 1.469-5T. You only need to satisfy one. But not all seven are created equal for STR investors, and the two you are most likely to use are Test 1 and Test 3.

Test 1: The 500-Hour Test. You participated in the activity for more than 500 hours during the tax year. This is the cleanest, simplest test. If you can document 500 hours of direct involvement in your STR (guest communications, maintenance coordination, cleaning oversight, pricing adjustments, property inspections, supply management, bookkeeping), you pass.

Test 3: The 100-Hour Comparative Test. You participated for more than 100 hours, and no other individual (including employees, contractors, and property managers) participated more than you did. This is the test most STR investors with property managers rely on, and it is also the one most likely to trigger scrutiny. If you pay a co-host or management company to handle day-to-day operations, the IRS will ask how your hours exceeded theirs.

The other five tests exist but are less commonly applicable to STR investors. Test 4 involves aggregating significant participation across multiple activities. Tests 5 and 6 look at prior-year participation history. Test 7 is a facts-and-circumstances test requiring 100+ hours, but the IRS has been skeptical of taxpayers who rely solely on it.

One critical note: you must meet the material participation test for each STR separately unless you make the grouping election under Reg. 1.469-9. If you own three short-term rentals, the IRS can challenge your participation in each one independently.

The 750-Hour Confusion: Real Estate Professional Status vs. the STR Exception

I see this confused constantly, including by CPAs who should know better (yes, I have read their blog posts, and yes, some of them are wrong). So let me lay it out plainly.

Real estate professional status (REPS) is a separate classification under IRC 469(c)(7). It requires two things: (1) you spend more than 750 hours during the tax year in real property trades or businesses in which you materially participate, and (2) more than half of your total personal services are in real property trades or businesses.

REPS is the pathway for long-term rental investors to escape the passive activity rules. If you own a traditional 12-month lease property, REPS is how you turn those passive losses into deductions against active income.

STR investors using the 7-day average stay exception do not need REPS. The 7-day rule already removes the STR from the “rental activity” classification. You just need material participation (500 hours or 100+ hours comparative). The 750-hour threshold is irrelevant to the STR strategy unless your average stay exceeds 7 days, at which point your property is a rental activity and REPS becomes the relevant pathway.

Why does this matter? Because claiming REPS when you do not qualify (or claiming it unnecessarily alongside the STR exception) can complicate your return and create audit exposure. Keep the two pathways separate in your mind and on your return. Your CPA will thank you.

What the IRS Is Looking for Right Now

The IRS has not published a formal announcement saying “we are auditing more STR material participation claims.” But the signals are clear. IRS Commissioner Danny Werfel’s testimony to Congress in early 2025 flagged “high-income returns claiming substantial rental losses” as a priority area. The Inflation Reduction Act’s funding increase gave the agency resources to follow through. And practitioners across the country are reporting more information document requests (not full audits, but the politely worded letters that ask for specific documentation on specific line items) related to Schedule E losses from short-term rentals.

Imagine you are a host who just received one of those letters. The IRS is asking you to substantiate your material participation claim for tax year 2025. What do they want to see?

Contemporaneous time logs. This is the single most important document. A log maintained throughout the year (weekly or at least monthly entries) showing specific dates, specific hours, and specific tasks. “April 14: 3 hours, coordinated HVAC repair, responded to 4 guest inquiries, reviewed pricing for Memorial Day weekend.” Not “Q2: approximately 150 hours, various management tasks.”

Corroborating evidence. Email timestamps showing guest communications. Text messages with cleaners and maintenance contractors. Calendar entries. Credit card receipts for supply runs. Screenshots from your property management software showing manual adjustments you made. The IRS does not require a specific format (Treas. Reg. 1.469-5T(f)(4) says “any reasonable means”), but Tax Court has repeatedly given more weight to records kept contemporaneously than to year-end reconstructions.

Separation of owner hours from contractor hours. If you use a cleaning crew, a co-host, or a property manager, the IRS wants to know how many hours they logged. Under Test 3, your hours must exceed any single other individual’s involvement. A property manager who handles 200 hours of guest communication while you handle 210 hours of everything else means you pass. But if the property manager logs 250 hours and you log 200, you fail it.

The Reconstructed Log Problem

I need to be direct about this because it is where I see the most risk for otherwise well-intentioned investors.

A time log created in March 2027 for the 2026 tax year is a reconstructed log. The IRS knows what these look like. They have uniform formatting. The hours are suspiciously round. The entries lack the kind of granular detail that a real-time log contains. Nobody writing in real time notes “cleaned gutters, 2 hours” without also mentioning that the rain started at 3 pm and they had to finish the north side the next morning.

Tax Court does not treat reconstructed logs as worthless. But in case after case (Pohang Iron, Bailey, Tolin), the court has found that after-the-fact reconstructions without corroborating evidence are insufficient to carry the taxpayer’s burden of proof. The burden is on you, not on the IRS, to prove material participation.

Start your log now. Today. Use a spreadsheet, a note-taking app, or a dedicated tracking tool. The format does not matter. The timing does.

What Investors Should Do Before December 31, 2026

If you already own an STR (pre-January 20, 2025 acquisition):

1. Start or improve your time log immediately. If you have been tracking hours casually, formalize it. Date, hours, specific activity. Weekly entries at minimum.
2. Calculate your average guest stay. Pull your booking data from Airbnb, Vrbo, or your PMS. Divide total guest-nights by total bookings. If your average is above 7 days, the STR exception does not apply and you need to evaluate REPS instead.
3. Quantify your property manager’s hours. If you use a co-host or management company, ask them for a log of their hours by property. You need this for Test 3.
4. Talk to your CPA about the 20% rate. If you have remaining short-lived assets from a cost segregation study that have not been placed in service, 2026 is the last year you get any bonus depreciation on them. The rate drops to zero in 2027.
5. Consider a cost segregation study if you have not done one. Even at 20%, accelerating $100,000 in components generates a $20,000 first-year deduction. Combined with standard depreciation, the tax benefit is still meaningful.

If you are acquiring an STR in 2026:

1. Confirm your acquisition date is after January 19, 2025. If it is, you qualify for 100% bonus depreciation under the OBBBA. Order your cost segregation study before you file.
2. Set up your time tracking system on day one. From the moment you close, every hour you spend on that property should be logged. Your 2026 return will be the first year you claim losses, and it is the year most likely to draw attention.
3. Structure your management arrangement to support material participation. If you hire a property manager, ensure your agreement clearly defines their scope and your retained responsibilities. The IRS looks at the totality of the arrangement.
4. Run the numbers before you close. Use the StaySTRA Airbnb calculator to model cash flow, and have your CPA model the depreciation benefit separately. A deal that only works because of the tax deduction is a deal that stops working the moment you fail to prove material participation.

The Bottom Line

The depreciation rate gets the headlines. Material participation is what actually determines whether you get the deduction. Whether you are working with 20% on an older property or 100% on a new acquisition, the IRS is asking the same question: did you actually run this business, or did you just own it?

The answer is in your documentation. Start building it now.

We do our best to keep our regulatory guides accurate and up to date, but ordinances change and we are only human. Always verify current requirements directly with your local municipality before making business decisions.