Real Estate Investor Case Studies Using REPS, STRs & More

What’s the real-world impact of using strategic tax planning as a real estate investor? In a recent episode of the TaxSmart REI Podcast, CPAs Thomas Castelli and Ryan Carriere shared real-life client case studies that show exactly how investors have saved thousands, sometimes hundreds of thousands, by leveraging the real estate professional status (REPS), the short-term rental (STR) loophole, and cost segregation strategies.

Here are some of the top takeaways and most compelling examples from that conversation.

REPS Case Studies: Turning Active Involvement into Major Savings

1. Brian & Susan: $285K Saved in One Year

Susan qualified for REPS as both a real estate agent and active portfolio manager. After cost segregation and using IRS Form 3115, she and her high-income W-2 husband saved $285,000 in one year, and carried forward over $1 million in net operating losses.

2. Mason & Kate: $20K–$25K Annual Savings

They had never heard of REPS before working with the team. After qualifying, they unlocked $20K in tax savings for the first year—and expect even more in the years ahead.

3. Alex & Peter: $100K Saved + Smart Timing

With over $500K in total income and several property exits, timing was everything. Strategic cost seg studies helped them hit the 0% long-term capital gains tax bracket and save nearly $100K, while preserving depreciation for future use.

Takeaway: REPS can lead to massive savings, but timing, documentation, and execution matter just as much as eligibility.

STR Loophole in Action: Six-Figure Wins (and Losses Avoided)

1. Blaine: $300K+ in STR Savings + Business Restructure

A high-earning business owner with a luxury STR saved over $300,000 using the STR loophole and cost segregation, and another $25,000 annually just by restructuring his business to an S Corp.

2. High-Income Attorney: $130K Saved via Retroactive Planning

By applying 100% bonus depreciation from 2022 to their 2023 return using Form 3115, this W-2 earner saved $130,000 in taxes, all thanks to strategic timing.

3. Alex & Kate (Again): Missed Opportunity from CPA Error

Their previous CPA opted them out of bonus depreciation—a permanent and irreversible mistake. They recovered some of the benefit through amended returns but still left significant money on the table.

Takeaway: The STR loophole is powerful, but if you’re not working with a specialist, you may miss out or make costly, permanent mistakes.

Non-REPS Wins: You Don’t Need REPS to Save Big

1. Rosie: $40K Annual Tax Reduction Without REPS

A full-time W-2 earner with a growing portfolio used cost seg studies on new acquisitions to shelter income from her older rentals. No REPS or STR loophole needed—just solid, proactive planning.

2. Ryan & Jen: C-Corp + STR Combo = $80K Tax-Free Withdrawal

With five STRs and cash trapped in a C Corporation, they used depreciation to reduce taxable income and entered the 0% LTCG bracket, allowing them to withdraw $80K in dividends tax-free.

Takeaway: Strategic layering of tax tools can create advanced planning opportunities, even for non-REPS investors.

Mistakes & Missed Opportunities: What NOT to Do

• Missed Cost Seg + Expensing: One client failed to apply the de minimis safe harbor or conduct a cost seg study, costing them $17K until we amended the return.
  
• Over-Deducting with a Generalist CPA: A taxpayer had unknowingly deducted personal expenses, leading to hundreds of thousands in back taxes. A second opinion—and several amended returns—saved them from worse penalties.
  
• Schedule C vs. Schedule E Error: Misreporting STR income led to financing issues and disqualified the investor from STR benefits due to average stay miscalculations on a multi-unit property.

 Takeaway: Mistakes don’t just cost you money—they can prevent financing, trigger audits, or worse. Don’t wait until it’s too late to seek expert advice.

Final Thoughts: The Cost of Doing It Yourself

This episode was a reminder that tax strategy isn’t just theory—it has real financial consequences. From six-figure wins to costly missteps, the difference comes down to who’s on your team and when you get started.

If you’re ready to optimize your tax strategy, stop overpaying the IRS, and avoid costly mistakes, book a discovery call with the Hall CPA team today.

Schedule a free discovery call with our team

Transcript

Introduction

Thomas Castelli, CPA [00:00]:
Thanks for tuning into this week’s episode of the TaxSmart REI Podcast. Today, Ryan and I are going to walk through real-life case studies focused on tax savings strategies, like real estate professional status (REPS), the short-term rental loophole, and other planning opportunities. These are actual examples from recent client experiences, and we’ll also talk about some of the mistakes and missed opportunities we’ve seen along the way. Stick around—some of these will definitely surprise you.

We want to be clear up front: while these are real stories, we’ve redacted names, rounded the numbers, and altered details just slightly to protect client privacy. We’ll be covering three REPS case studies, three short-term rental case studies, two non-REPS examples, and finally, a few real-world mistakes that cost investors serious money.

If this is your first time tuning in, just know, we don’t usually do episodes like this. We’ve published over 300 episodes with expert interviews and deep dives into tax strategy. But today, we wanted to show what’s actually possible with the right planning and execution. All right, let’s dive in. Ryan, want to kick us off?

REPS Case Study #1: Brian & Susan

Ryan Carriere, CPA [02:00]:
Sure thing. So our first case study involves Brian and Susan. They’re high-income earners in the 37% federal tax bracket. Susan is a real estate agent who actively manages their rental portfolio, and Brian is a high-income W-2 earner.
We helped Susan qualify as a real estate professional under REPS and recommended cost segregation studies across several of their properties. We then used IRS Form 3115 to retroactively capture $1.5 million in depreciation. That allowed them to offset $210,000 of Susan’s real estate income and $568,000 of Brian’s W-2 income. Altogether, that generated over $285,000 in tax savings in one year.

Thomas Castelli, CPA:
Right, and they still had more than $1 million in net operating losses to carry forward into future years. The kicker? They had owned these properties for years without ever doing cost segs or leveraging REPS. No one had ever given them this advice, so when we came in and applied these strategies all at once, the results were huge. This isn’t rare, we’ve done this before for plenty of clients in similar situations.

REPS Case Study #2: Mason & Kate

Thomas Castelli, CPA [06:45]:
Our next REPS case is Mason and Kate. Mason is a high W-2 earner and Kate is a real estate agent. They had never even heard of REPS or its benefits.

Ryan Carriere, CPA:
Exactly. We helped them qualify for REPS, conducted a cost segregation study, and they saved $20,000 in taxes that year. While that number may not be as dramatic as the first case, they’re planning to do the same thing again this year, which will save them another $25,000. So now they’ve got a repeatable strategy in place, which adds up to significant savings over time.

REPS Case Study #3: Alex & Peter

Ryan Carriere, CPA [07:51]:
Alex and Peter had over $50,000 in taxable rental income each year and a sizable portfolio. But they had never claimed REPS, and never performed cost segregation. Peter works full-time in business, and Alex handles all the property management full-time, so REPS was definitely on the table.

For 2024, their total income came in just over $500,000 after a few successful exits. We advised cost segregation studies to offset the rental income, business income, and depreciation recapture, and we timed it strategically to keep them in the 0% long-term capital gains bracket. That saved them nearly $100,000 in taxes this year and allowed them to preserve additional cost segs for future use.

Thomas Castelli, CPA:
This one really shows the importance of timing. Sometimes it’s not just about knowing the strategy—it’s knowing when to apply it.

Transition to Short-Term Rental Case Studies

Thomas Castelli, CPA [10:47]:
All right, that wraps up our REPS case studies. Let’s pivot to short-term rental examples. But before we do, quick plug: now is the perfect time to start your 2025 tax planning. We’re fresh off Q1, and with nine months left, there’s plenty of time to implement strategies properly—before you’re scrambling at year-end. If bonus depreciation is reinstated this May, there will be a rush. Don’t wait. Head to www.therealestatecpa.com/podcast to book a free call with our team.

STR Case Study #1: Blaine – Business Owner + STR

Thomas Castelli, CPA [13:04]:
Let’s start off with Blaine. He’s a financial services professional, making over $500,000 per year and typically filing as a sole proprietor on Schedule E. Blaine also owned a high-end short-term rental property.
Our first recommendation was to restructure his business into an S Corporation. That allowed him to pay himself a salary, which limited his exposure to self-employment tax, while the rest of his earnings passed through as distributions—not subject to self-employment tax. That structural change alone saved him about $25,000 per year, going forward.

But it didn’t stop there. With that STR property, we advised a cost segregation study and applied the short-term rental loophole. The result? He saved over $300,000 in taxes. This is a classic case of how business owners can combine STR and entity strategies for massive tax wins.

STR Case Study #2: High-Income Attorney

Ryan Carriere, CPA [14:25]:
This next example is a high-income W-2 attorney, earning over $500,000 a year. When they came to me, they had one short-term rental placed in service in 2022—but they hadn’t used a cost segregation study yet.
So in 2023, we used IRS Form 3115 to take advantage of the 100% bonus depreciation that was still available from the prior year. It was a perfect scenario—2023 ended up being an even higher-income year for them, so each dollar of deduction was even more valuable. End result: they saved about $130,000 in taxes on their 2023 return.

This case highlights the power of retroactive planning, especially when timing aligns well with income spikes.

STR Case Study #3: Alex & Kate – CPA Error

Thomas Castelli, CPA [15:53]:
This one’s a bit painful. Alex and Kate had heard of the STR loophole and had been prepping for it—but their prior CPA made a critical mistake by opting them out of bonus depreciation on one of their returns. That election is permanent and irreversible. So even though they later did a cost segregation study, the accelerated depreciation had to be taken over 5, 7, and 15 years, instead of all upfront.
When they started working with us, we amended their return and still managed to increase depreciation from $14,000 to $32,000 over five years. That translated into about $10,000 of tax savings in Year 1 and $12,000 in Year 2. Still helpful, but a far cry from what they could have saved.

Had they worked with a specialist from the beginning, they likely would have avoided the opt-out entirely—and saved significantly more. This example underscores why working with a generalist can cost you, sometimes permanently.

Ryan Carriere, CPA:
Yeah, and just to reinforce that—some mistakes, like this one, are truly permanent. You can’t amend out of an opt-out. That’s why it’s critical to work with a tax team before you acquire or place properties into service. Fixing things later often means missed dollars—and additional costs to amend returns.

Non-REPS Case Study #1: Rosie – Long-Term Investor

Thomas Castelli, CPA [20:56]:
Let’s move into the non-REPS examples now. Rosie is a full-time W-2 employee who had been growing her rental portfolio for years. She was profitable—but she was paying a ton of taxes on her rental income every year.
When she came to us, we helped her understand and apply cost segregation and bonus depreciation strategies to her newer acquisitions. The depreciation from those newer properties helped shelter income from her older, profitable rentals. This strategy reduced her tax bill by over $40,000 annually.

Ryan Carriere, CPA:
What’s great about this one is that she didn’t need to meet REPS or STR qualifications. No 750-hour requirement, no time logs—just straightforward application of bonus depreciation to offset rental cash flow. Super clean, and repeatable year after year.

Non-REPS Case Study #2: Ryan & Jen – STR + C-Corp Strategy

Thomas Castelli, CPA [23:36]:
This one’s a bit more complex. Ryan and Jen had five short-term rentals and about $60,000 in taxable rental income. On top of that, they had a C Corporation holding a large chunk of retained earnings—money they couldn’t access without triggering big tax liabilities.

We performed cost segregation studies on their STRs to wipe out the income from their W-2 earnings, which alone saved them about $25,000. But the real win came when we were able to drop them into the 0% long-term capital gains tax bracket. That allowed them to take an $80,000 qualified dividend out of the C-Corp—completely tax-free.
This case was incredibly strategic—layering entity planning, depreciation, and income timing all in one. Now, they’re planning to repeat the same setup in future years.

Mistake #1: Missed Cost Seg + De Minimis Expensing [25:44]

Ryan Carriere, CPA:
Let’s move into the last section—mistakes and missed opportunities. These are real client stories where things either went wrong or nearly did. First up, we reviewed a 2023 tax return and saw that the client had missed a prime opportunity to perform a cost segregation study on a property placed in service that year. They also failed to apply the de minimis safe harbor rule correctly to expense eligible costs.
After amending the return and applying both strategies, we unlocked $17,000 in tax savings. I’ve actually seen a few clients in almost this exact scenario. And in most of these cases, it’s not that the taxpayer did anything wrong intentionally—they just didn’t know what was available to them or had a preparer who didn’t specialize in real estate.

Mistake #2: Unintentional Fraud by Over-Deducting [27:06]

Thomas Castelli, CPA:
This one is more serious. We had a client who’d been working with a general CPA who was writing off significant personal expenses as business deductions—things that definitely shouldn’t have been deducted. This had been going on for years.

Once we discovered it, we worked with the client to amend their prior returns. Yes, they had to pay hundreds of thousands in back taxes, but they likely avoided even larger penalties and interest—and potentially legal consequences. They even consulted an attorney who confirmed our concerns. This wasn’t someone trying to commit fraud—it was someone unknowingly relying on a CPA who was cutting corners. The takeaway here is: just because your CPA says it’s okay doesn’t mean it is. You need to work with specialists who know the rules.

Mistake #3: Wrong Form + Lost STR Strategy [29:12]

Thomas Castelli, CPA:
This next one really hurt to watch. A potential client came to us after attempting to use the short-term rental loophole to reduce their high W-2 income. But their general CPA had incorrectly reported their rental income on Schedule C instead of Schedule E, which not only created a huge loss but also triggered red flags with their lender—making it harder to secure financing.
That wasn’t the only issue. They also had a multi-unit short-term rental, but had rented one of the units as a long-term rental. Because the IRS calculates average stay across the entire building, this disqualified the whole property from meeting the STR loophole requirements.
With proper guidance, these errors could have easily been avoided. Instead, they missed out on significant tax savings and incurred the cost of amending a return—and they still didn’t get the full benefit they were hoping for.

Ryan Carriere, CPA:
Yeah, even just reporting income on the wrong schedule—C versus E—can make or break financing. It sounds small, but it can delay deals or disqualify you entirely. Add in the STR disqualification due to average stay, and it’s just a cascade of missed opportunities. The client had the right intentions—they just didn’t have the right guidance. And that’s unfortunately all too common.

Final Thoughts: Don’t Go It Alone

Thomas Castelli, CPA [33:06]:
We see this stuff all the time. These case studies? They’re just a snapshot of what comes across our desks. The real message today is this: once you’re in the business of real estate—whether rentals, short-term, syndications, or flips—taxes become more complex. That complexity creates opportunities, but also risks.
If you want to succeed in this space, you need a team: a great property manager, a great attorney, and a great accountant who specializes in real estate. And don’t go with the cheapest option just to save a buck. The wrong advisor might save you $500 today and cost you $50,000 over the next few years.

Ryan Carriere, CPA:
100%. And if you’re just getting started, the best time to work with a specialist is before you buy your first property. I talk to a lot of people who say, “Let me buy a property first, and then I’ll come back.” But by then, some decisions are already locked in. Like electing out of bonus depreciation—that’s permanent. You can’t undo that.
And also, just be careful who you listen to on social media. There are some great tax experts out there, but there are also a lot of marketers who know how to go viral but don’t know the tax code. Flashy doesn’t always mean factual.

Outro

Thomas Castelli, CPA [37:26]:
We don’t do case study episodes like this often, but after reviewing the results we’ve helped clients achieve, we knew we had to bring this to the table. You hear about strategies like REPS, STR loopholes, and cost seg all the time—but today, you got to see how the rubber meets the road.

If you’re a real estate investor who wants to avoid critical mistakes, capture all the tax benefits you’re entitled to, and work with a specialist team that knows this stuff inside and out, book a discovery call with us. The link’s in the show notes. We’d love to learn more about your situation.

Ryan Carriere, CPA:
And make sure whoever you choose to work with really understands real estate. At our firm, 100% of our clients own rental properties. That’s all we do. So if you want that depth of experience, we invite you to reach out. Thanks for listening—and see you next time.

Disclaimer: This podcast summary and transcript were partly generated and may contain some errors or miss key points from the audio recording.