Does the STR loophole work for state income taxes the same way it does federally?

In most states, yes. States that conform to federal adjusted gross income automatically pick up the non-passive characterization you established at the federal level under IRC §469. A few states with outdated or decoupled conformity rules may require a separate analysis, so confirm your state's conformity status with a CPA.

Which states do not conform to federal bonus depreciation for STR cost segregation?

States that have historically decoupled from IRC §168(k) bonus depreciation include California, Illinois, New Jersey, New York, and Pennsylvania, among others. In these states, the year-one paper loss on your state return will be smaller than your federal paper loss because the reclassified components must be depreciated over their MACRS lives rather than expensed immediately.

If I own an STR in a different state than where I live, how does the state tax treatment work?

You will file a nonresident return in the state where the property is located and a resident return in your home state. The non-passive characterization from the STR loophole still applies, but each state applies its own conformity rules and rates. Multi-state STR ownership adds complexity and makes CPA review especially important.

Can the STR loophole reduce state taxes in California given its high marginal rate?

Yes, California generally conforms to the non-passive treatment under IRC §469, so a properly documented STR loss offsets California ordinary income at up to a 13.3% marginal rate. However, California decouples from federal bonus depreciation, so the year-one state deduction is smaller than the federal deduction. The benefit is real but not identical to the federal savings.

What tax court cases support the material participation documentation requirements?

Almquist v. Commissioner established that after-the-fact reconstructions of hours are unreliable and can be disregarded. Penley v. Commissioner showed that rounded hours without start and end times fail scrutiny. Moss v. Commissioner held that vague 'on call' time does not count toward material participation. These cases underscore why contemporaneous logs with specific tasks and time blocks are essential.

STR Loophole and State Income Tax: What to Expect

Name: STR Loophole
Author: Jennifer Beadles

Your CPA nails the federal side. The STR loophole unlocks the non-passive loss, it offsets your W-2, and your federal tax bill drops. Then you file your state return and wonder why the savings are smaller than you expected, or in a few states, why they disappeared entirely.

State income tax treatment of STR loophole losses is the part of this strategy that most investors never think about until they are staring at an unexpected state tax bill. Here is what you actually need to know.

TL;DR: Most states conform to the federal passive-activity rules under IRC §469, so when the STR loophole makes your rental losses non-passive at the federal level, those losses usually offset state ordinary income too. A few states decouple from federal rules, cap the deduction, or impose their own passive-activity limits. The dollar impact depends on your state's tax rate and conformity status, and it can swing your total savings by thousands.

Jennifer Beadles is a real estate investor and short-term rental owner who uses the STR loophole on her own properties. She writes from hands-on operating experience plus current IRS guidance (IRC §469 and Treas. Reg. §1.469-1T(e)(3)(ii)(A)).

How the STR Loophole Creates a Non-Passive Loss in the First Place

Before getting into state rules, a quick recap of the mechanism, because it matters for understanding what states are actually conforming to (or not).

Under Treas. Reg. §1.469-1T(e)(3)(ii)(A), a rental property whose average guest stay is 7 days or fewer is not treated as a rental activity for passive-activity-loss purposes. That means it falls outside the normal rule that traps rental losses as passive. Instead, it is treated like a trade or business.

Once it is a trade or business activity, you only need to materially participate to make the losses non-passive. The most common way to clear that bar is the 100-hour test under Treas. Reg. §1.469-5T: you put in more than 100 hours AND more than anyone else (cleaners, co-hosts, property managers included). Hit that, and your losses flow directly against W-2 income and other ordinary income, dollar for dollar. No real estate professional status. No 750 hours. You can read how the 7-day average stay is calculated and why it matters in this breakdown of the 7-day rule.

The resulting paper loss usually comes from depreciation, particularly when a cost segregation study front-loads 5-, 7-, and 15-year components into year one using 100% bonus depreciation under IRC §168(k), as restored permanently by the One Big Beautiful Bill Act (signed July 2025). For a worked example of what that looks like against a high W-2 income, see this STR loophole high-income W-2 example.

Now. When you take that federal non-passive loss and carry it to your state return, what happens?

How State Income Tax Conformity Works for STR Losses

States generally build their income tax codes on top of federal adjusted gross income (AGI) or federal taxable income. If they start from federal AGI, they are automatically picking up the non-passive characterization you established at the federal level, because that characterization already flowed through your Schedule E and into your federal AGI.

This is called rolling conformity or static conformity, and it is the most important concept here. A state that conforms to the IRC as currently in effect (rolling conformity) will almost always recognize your non-passive STR loss without any additional state-level filing gymnastics. A state with static conformity, where the state adopted the IRC as of a specific date and has not updated since, may or may not recognize the current version of the passive-activity rules.

The practical takeaway: most states conform well enough that your federal non-passive characterization carries through. But "most" is doing real work in that sentence.

States That May Not Play Along (and What That Costs You)

A handful of states have meaningful departures from federal passive-activity treatment. The categories to watch:

States with no income tax. If you live in Texas, Florida, Nevada, Wyoming, South Dakota, Washington, Tennessee, or New Hampshire (on wages), this conversation is largely academic. You get the full federal benefit and no state income tax friction.

States with their own passive-activity rules. California is the biggest example. California conforms to IRC §469 for most purposes, but it has its own rate structure and its own adjustments. California does generally conform to the non-passive characterization from the STR loophole, so a properly documented STR loss will offset California ordinary income. At California's top marginal rate of 13.3%, that is significant. A $60,000 paper loss saves you up to $7,980 in California state tax on top of the federal savings.

States with bonus depreciation decoupling. This is the sneaky one. About half of U.S. states do not conform to federal bonus depreciation under IRC §168(k). They require you to depreciate assets on the normal MACRS schedule instead, which means the massive year-one paper loss you created through cost segregation plus 100% bonus depreciation may be much smaller on your state return. You still get the deduction eventually, but it gets spread over 5, 7, or 15 years rather than hitting all at once.

States that historically decouple from bonus depreciation include Illinois, New Jersey, New York, Pennsylvania, and several others. This does not eliminate the benefit of the STR loophole on your state return. It delays it and shrinks the year-one state savings.

States with passive-activity conformity gaps. A small number of states have not kept their conformity dates current or have enacted their own passive-activity rules that do not mirror the federal exception. If your state starts its income calculation from a federal base year that predates the current Treasury regulations, you may need to demonstrate non-passive treatment separately under state law. Your CPA needs to check the specific conformity date.

A Worked Example: Federal vs. State Tax Savings Side by Side

Here are the assumptions:

W-2 income: $250,000
STR purchase price: $600,000
Depreciable basis after land: $480,000
Cost segregation identifies $144,000 in 5/7/15-year components (30% of depreciable basis, a typical range)
100% bonus depreciation applies to those components
First-year paper loss from depreciation alone: $144,000
Assume total STR loss after expenses: $160,000
Federal marginal rate: 32%
State: California (13.3% top marginal rate, conforms to non-passive treatment, but decouples from bonus depreciation)

Federal calculation:

$160,000 non-passive loss × 32% = $51,200 in federal tax savings

State calculation (California, with bonus depreciation decoupling):

California requires you to depreciate the $144,000 of reclassified components over their MACRS lives instead of expensing them in year one. A rough weighted average over 5- and 7-year property gives you roughly $22,000 of depreciation in year one on those components, instead of $144,000.

Revised state paper loss: $160,000 - $144,000 (removed) + $22,000 (allowed) = $38,000 $38,000 × 13.3% = $5,054 in California state tax savings

Combined first-year savings: $56,254

Compare that to a state without bonus depreciation decoupling, like Tennessee (no state income tax on wages) or a state with full conformity and a 5% rate:

$160,000 × 5% = $8,000 in additional state savings, bringing the combined total to $59,200

The difference between a conforming state and a non-conforming one is not the STR loophole itself. The loophole works the same federally either way. What changes is how much of the year-one paper loss your state lets you use right now. Want to run your own numbers? Try the cost segregation calculator at strhours.com to see how the components break down for your property.

Key Takeaways: What to Check Before You File

Confirm your state's IRC conformity type. Rolling conformity states generally pass through the federal non-passive characterization automatically. Static conformity states may require a separate review.
Check whether your state conforms to IRC §168(k) bonus depreciation. If it does not, your state paper loss in year one will be smaller than your federal paper loss. The depreciation is not lost, just spread out.
Verify the non-passive characterization flows to your state return. In most states, this is automatic from Schedule E. In a few, your CPA may need to add a state-specific disclosure or adjustment.
Do not forget state-level estimated taxes. If the federal loss drops your federal withholding obligation significantly but your state decouples from bonus depreciation, you could still owe state estimated tax payments even in the same year you get a big federal refund.
Multi-state situations add complexity. If you own an STR in a state other than where you live, you will file a nonresident return in the property's state. The non-passive characterization still applies, but the state where the property sits may have its own rules on how that loss interacts with your nonresident filing.

How This Affects Your Documentation Strategy

The state angle is actually one more reason to keep tight hour logs. To understand why, think about what happens in an audit. If a state starts from federal AGI and your federal non-passive treatment gets challenged, the state loss evaporates with it. Your documentation, specifically the contemporaneous time logs that show you hit the 100-hour material participation test, protects both your federal and your state position simultaneously.

Tax court cases like Almquist have shown that after-the-fact estimates do not hold up. Rounded hours with no start and end times lose (Penley). Your logs need to record the date, the task, and the actual time block. The STR Loophole app at strhours.com is built specifically for this: it logs your hours as you go, tracks your totals against the 100-hour threshold, and gives you a defensible record that works for both federal and state purposes.

For more on what the IRS looks at when it examines STR participation claims, see how STR losses offset W-2 income and the complete STR loophole guide.

What This Means for Your Total Tax Picture

The STR loophole is a federal strategy first. The non-passive characterization under Treas. Reg. §1.469-1T(e)(3)(ii)(A) and the material participation rules under Treas. Reg. §1.469-5T live in the federal code. State conformity is real and valuable, but it is not guaranteed to be identical to the federal benefit.

Honestly, most investors focus entirely on the federal savings and treat the state benefit as a bonus. That is not wrong. But understanding the state layer, especially if you are in a high-income-tax state that decouples from bonus depreciation, helps you set accurate expectations and avoid surprises at filing time.

Is the state benefit worth chasing on its own? No, not really. The strategy makes sense because of the federal impact. The state benefit is a multiplier, not the reason to do it.

Sources

Bottom line: Check your state's conformity status and whether it conforms to IRC §168(k) bonus depreciation. In most states, the non-passive characterization from the STR loophole carries through to your state return automatically and saves you real money at the state rate. Where bonus depreciation decoupling applies, the year-one state savings are smaller but not zero. Either way, the federal benefit is the engine. Keep your hour logs tight, run your numbers on both returns, and make sure your CPA has worked with STR investors before.

This article is for educational purposes only and is not tax or legal advice. Talk to a CPA who knows short-term rentals before you act on it.

How Does the STR Loophole Affect Your State Income Tax Bill