Best Cost Segregation Companies for Short-Term Rentals (2026)
If you own a furnished short-term rental, your cost segregation study should look meaningfully different from someone with an unfurnished long-term rental down the street. The building structure is the same, sure. But the furniture, the kitchen supplies, the smart TVs, the outdoor patio set, the decorative lighting, the hot tub — all of that is 5-year personal property under MACRS. With 100% bonus depreciation permanently restored, you can write all of it off in year one.
The problem is that most cost segregation providers built their workflows around unfurnished rental houses and commercial buildings. They are perfectly competent at classifying a roof and HVAC system. But the FF&E component — the furniture, fixtures, and equipment that make a vacation rental a vacation rental — is where STR studies live or die. A provider that lumps your $40,000 in furnishings into a generic "personal property" line item is leaving specificity (and potential audit defensibility) on the table. You want component-level detail: beds, sofas, dining sets, appliances, window treatments, outdoor furniture, each with its own cost and MACRS class.
The other STR-specific consideration is speed. Many Airbnb investors are buying properties in Q4 and need a study done before the April filing deadline. A 6-week turnaround from a traditional firm means you are either filing an extension or scrambling. The best STR-focused providers understand this urgency and have built their process around it.
Top 10 Cost Segregation Companies for STR / Airbnb
Ranked by STR-specific score. Pricing and turnaround are estimates based on publicly available information.
| # | Provider | STR Score | Pricing | Turnaround |
|---|---|---|---|---|
| 1 | R.E. Cost Seg | ★★★★☆ 9.0 | $895–$5K+ | 5–10 days / 3–4 wks |
| 2 | Cost Seg Smart * | ★★★★☆ 8.5 | From $795 | Under 1 hour |
| 3 | KBKG | ★★★★☆ 8.0 | $5K–$15K+ | 4–8 weeks |
| 4 | Remote Cost Seg | ★★★☆☆ 7.5 | Est. $2K–$8K | 2–3 weeks |
| 5 | Maven Cost Seg | ★★★☆☆ 7.5 | From $1,900 | 3–4 weeks |
| 6 | Dimov Tax & CPA | ★★★☆☆ 7.0 | $3K–$8K (Est.) | 2–4 weeks |
| 7 | CSSI | ★★★☆☆ 6.5 | $5K–$15K+ | 4–8 weeks |
| 8 | CostSegEZ | ★★★☆☆ 6.5 | Low cost | 2 minutes |
| 9 | Madison SPECS | ★★★☆☆ 6.5 | $5K–$15K+ (Est.) | 2–4 weeks |
| 10 | Titan Echo | ★★☆☆☆ 5.5 | Subscription | Minutes |
* Cost Seg Smart is operated by us. Full disclosure.
#1. R.E. Cost Seg — The STR Default
★★★★☆ 9.0/10 • $895–$5K+ • 5–10 days (Rapid) / 3–4 weeks (full)
Yonah Weiss and R.E. Cost Seg have become the default answer on BiggerPockets, STR-focused podcasts, and Airbnb investor communities. There is a reason for that. They built the entire business around residential and short-term rental investors, and their $895 Rapid Report is specifically designed for the sub-$1M vacation rental that does not need an on-site inspection or a 40-page methodology narrative.
What matters for STR owners: they capture FF&E well. Furniture, appliances, decor, outdoor equipment — the report itemizes these as separate 5-year components rather than burying them in a generic lump sum. The Rapid Report turnaround (5-10 business days) also fits the filing-deadline crunch that most STR investors face.
The limitation is at the higher end. If you own a $3M luxury cabin with a custom pool, commercial kitchen, and spa, the Rapid Report probably is not sufficient. Their full engineering study handles that, but it is $3,000-$5,000+ and takes 3-4 weeks — at which point you are in the same pricing territory as bigger firms. For the typical Airbnb in the $300K-$800K range, though, R.E. Cost Seg is the obvious starting point.
#2. Cost Seg Smart — Fastest, Lowest Price
★★★★☆ 8.5/10 • From $795 • Under 1 hour
Disclosure: Cost Seg Smart is our company. We built it, we run it, and we are obviously biased. We are including it here because it would be dishonest to rank STR providers and exclude ourselves. Take this review with that context.
Cost Seg Smart is fully automated. You enter your property details, pay, and receive a completed cost segregation study — typically in under an hour. The report uses RSMeans 2024 cost data, IRS ATG methodology, and component-level detail across 5-year, 7-year, 15-year, and 39-year (or 27.5-year) MACRS classes. For STRs specifically, the engine accounts for furnished rental FF&E intensity, which means a short-term rental gets a different (higher) allocation to 5-year personal property than an identical unfurnished long-term rental.
The price-to-value case is straightforward: $795 for a study that would cost $3,000-$7,000 elsewhere, delivered in an hour instead of a month. The tradeoff is that there is no human engineer reviewing your specific property. For a standard vacation rental — a 3-bedroom house or condo listed on Airbnb — that tradeoff works. For a $5M mixed-use property with specialized systems, you probably want a human involved.
#3. KBKG — Best for Luxury and Complex STRs
★★★★☆ 8.0/10 • $5K–$15K+ • 4–8 weeks
KBKG is the gold standard in cost segregation. 30,000+ studies, staff who helped author the IRS Audit Techniques Guide, engineers who have testified in Tax Court. If your CPA has a preferred cost segregation provider, there is a good chance it is KBKG. Their methodology is unimpeachable.
The question for STR owners is whether you need that level of firepower. At $5,000-$15,000+, KBKG is priced for commercial buildings, hotels, and institutional investors. For a $600K Airbnb cabin, you would pay $5,000+ for a study that produces similar filing outcomes to an $895 report. The math does not work for most vacation rentals.
Where KBKG earns the #3 STR spot is for high-value and complex short-term rentals: luxury properties above $2M, boutique hotels, properties with specialized amenities (commercial pools, spa facilities, event spaces), or situations where you need the strongest possible audit defense. If your STR portfolio is worth $10M+ and your CPA wants a name they trust on every study, KBKG is the answer. For everyone else, it is overkill.
What to Look for in an STR Cost Segregation Provider
Not all cost segregation studies are created equal for vacation rentals. Here are the criteria that actually matter when you are choosing a provider for a furnished short-term rental.
1. FF&E capture and component detail
This is the single most important factor. A good STR study should separately itemize furniture, appliances, electronics, linens, kitchenware, outdoor equipment, and decorative items as 5-year personal property. If the report lumps everything into "building components" and "personal property" with no line-item detail, the provider is not doing STR-specific work. You want to see individual entries: dining table, sofa set, washer/dryer, smart TV, patio furniture. That level of detail is what makes a study defensible if the IRS asks questions.
2. Understanding of the STR business model
Short-term rental investing has specific tax considerations that a generalist cost seg firm may not handle well. Material participation vs. passive activity rules, the interaction between cost segregation and the short-term rental loophole, how renovation costs should be treated for a property converted to Airbnb use — your provider should understand these scenarios, or at minimum produce a report that your CPA can work with regardless of your tax situation.
3. Speed and turnaround
STR investors often buy properties late in the year and need a completed study before the April filing deadline. A provider with a 6-8 week turnaround means you are filing an extension or missing year-one deductions entirely. For standard vacation rentals, there is no technical reason a study should take more than a few weeks. Providers that deliver in days or hours have built their process specifically for this use case.
4. Pricing relative to property value
The math matters. If your Airbnb cost basis is $400,000 and the study reclassifies 35% into accelerated categories, that is $140,000 in accelerated depreciation. At a 32% marginal tax rate, the year-one tax benefit is roughly $45,000. A $795 study has a 56:1 ROI. A $7,000 study has a 6:1 ROI. Both are "worth it" in absolute terms, but the $795 study is objectively a better deal for a standard residential STR. Use our ROI calculator to run the numbers for your property.
5. CPA-ready deliverables
Your CPA needs specific things from a cost segregation study: a depreciation schedule with MACRS class assignments, placed-in-service dates, and cost allocations that tie to your tax basis. Some providers deliver polished PDF reports that look great but require the CPA to manually extract the numbers. The best providers include a structured depreciation schedule that your CPA can use directly when preparing your return.
Frequently Asked Questions
Does my furniture count for cost segregation on an Airbnb?
Yes. Furniture, appliances, decor, linens, kitchenware, electronics, and outdoor furniture in a furnished STR are all classified as 5-year personal property under MACRS. With 100% bonus depreciation permanently restored by the One Big Beautiful Bill Act (July 2025), you can deduct all of it in year one. This is the single biggest reason STR cost segregation studies produce larger deductions than unfurnished long-term rentals. A well-furnished vacation rental might have $30,000-$80,000 in FF&E alone, all of which can be written off immediately.
What about renovations I did before listing on Airbnb?
Renovations and improvements are depreciable separately from the original purchase price. If you remodeled a kitchen, added a deck, upgraded bathrooms, or finished a basement before listing, those costs can be included in your cost segregation study. You will need documentation of the renovation costs — invoices, receipts, or a reasonable estimate. Many renovation components (cabinets, countertops, appliances, light fixtures, flooring) are 5-year or 7-year property, which makes renovated STRs particularly strong candidates for cost segregation.
What is the difference between cost segregation for an STR vs. a long-term rental?
The IRS methodology is identical. The difference is in the results. A furnished short-term rental has significantly more 5-year personal property than an unfurnished long-term rental. A typical STR study might reclassify 30-40% of the cost basis into accelerated categories, compared to 20-30% for a comparable unfurnished LTR. The gap is almost entirely FF&E — the furniture, electronics, kitchenware, and decor that make a vacation rental functional. If your provider does not specifically capture furnished rental components, you are leaving money on the table.
Can I do a lookback study on an STR I bought years ago?
Yes. Your CPA files Form 3115 (change of accounting method) and you take all the missed accelerated depreciation in the current tax year. Not amended returns — current year, one lump sum. If you bought a vacation rental three years ago and never did a cost segregation study, you can claim all missed accelerated depreciation in one shot on this year's return. There is no time limit on when you can do this, though properties placed in service after September 2017 benefit from 100% bonus depreciation on eligible components.
What if I converted a long-term rental to a short-term rental?
Converting an LTR to an STR does not change the depreciation schedule on the building itself — the original placed-in-service date and cost basis carry over. However, any new furniture, appliances, and decor you purchased for the STR conversion are new depreciable assets with their own placed-in-service dates. A cost segregation study can cover both: reclassifying the original building components into shorter lives and capturing the new FF&E. If you spent $30,000-$60,000 furnishing the property for Airbnb, the furnishing costs alone may justify a study.