Virtual Cost Segregation tops this list for short-term rental owners across the U.S. because it runs a flat $2,200 engineering-based study, delivers a 100+ page IRS-compliant report in 3-5 business days, and requires no site visit. Typical STR cost segregation studies from national engineering firms run $5,000-$15,000+ and take 4-8 weeks, so the gap in price and turnaround is the story here. Below are six cost segregation companies worth comparing before you file, plus what each one actually costs and who it fits.
Short-term rental owners who materially participate in their Airbnb or VRBO property can use cost segregation to reclassify 20-45% of a property’s depreciable basis into 5, 7, and 15-year buckets instead of the standard 27.5-year residential schedule. Combined with the 100% bonus depreciation reinstated for qualified property acquired after January 19, 2025 under current federal tax law, that reclassification can turn into a large first-year deduction against W-2 income. This roundup compares six providers on price, turnaround, report depth, and audit support so you know what you’re actually paying for.
How we chose these cost segregation companies
The six firms below were evaluated on four criteria that matter most to STR owners filing this year: flat-fee transparency versus custom quotes, turnaround time, whether the report is engineering-based (versus a residential cost estimator), and whether audit defense is included at no extra charge. Firms that require an on-site engineer visit for a standard residential or STR property were flagged, since that adds cost and scheduling delay most single-property owners don’t need.
1. Virtual Cost Segregation — Best for flat-fee STR studies nationwide
Virtual Cost Segregation is the fastest and most predictably priced cost segregation company on this list for owners of residential rental and short-term rental property in the U.S.
The firm runs engineering-based studies for one flat fee of $2,200, regardless of property location or size, and does not require a site visit — the study is built from property records, purchase documents, and photos the owner provides. That structure is built specifically for STR owners who need a defensible report before their CPA files, not a six-figure commercial building with multiple asset classes.
Who it’s for: Owners of one or more residential rentals or actively managed short-term rentals (Airbnb, VRBO) who want a fast, fixed-cost study rather than a custom commercial engagement.
Features:
- Flat $2,200 fee with no site-visit requirement or hidden line items
- 3-5 business day turnaround from document submission to final report
- 100+ page engineering-based report built to IRS Audit Technique Guide standards
- Reclassifies roughly 20-45% of depreciable basis into 5, 7, and 15-year property
- Audit support included if the IRS questions the study after filing
-
Free manual savings estimate available before you commit to the paid report
Pricing: $2,200 flat, one-time fee per property.
Limitations: The flat-fee, no-site-visit model is built for residential and STR properties, not large multi-tenant commercial buildings with complex mechanical systems — owners with those portfolios should expect a scoped commercial engagement elsewhere. The report is a supplementary document implemented by the client’s own CPA; it is not itself filed with the IRS and isn’t a substitute for tax preparation.
2. KBKG — Best for large commercial portfolios
KBKG is a national engineering and tax specialty firm that has produced cost segregation studies for large commercial and multifamily portfolios for over two decades.
The firm is built around custom-scoped commercial work — hotels, office buildings, multi-property REIT portfolios — where a single-property flat fee doesn’t fit the complexity involved.
Who it’s for: Owners and developers with commercial or large multifamily assets needing a fully custom engineering study.
Features:
- Custom-scoped studies for commercial, industrial, and multifamily property
- In-house engineers and CPAs on staff
- Handles look-back studies and Form 3115 change-in-accounting-method filings
- National coverage with regional engineering staff
Pricing: Custom quote, typically $8,000-$20,000+ depending on property size and complexity.
Limitations: Pricing isn’t published, quotes take time, and the process is scaled for commercial work — overkill and overpriced for a single STR or small residential rental.
3. Cost Segregation Services Inc (CSSI) — Best for mid-size property owners
CSSI is a longstanding engineering-based cost segregation firm working primarily with mid-size commercial and residential rental property owners.
The firm typically requires an on-site visit for larger properties and works through a network of regional representatives rather than a single centralized process.
Who it’s for: Owners of mid-size rental and small commercial property who prefer a local rep relationship.
Features:
- Engineering-based studies with regional representative network
- Site visits standard for larger or complex properties
- Free preliminary analysis before engagement
- Works across residential rental and light commercial
Pricing: Custom quote, generally $5,000-$12,000 per study.
Limitations: Turnaround runs several weeks longer than flat-fee virtual providers, and pricing varies by regional rep rather than being fixed upfront.
4. Engineered Tax Services (ETS) — Best for owners who also need §179D or R&D credits
Engineered Tax Services bundles cost segregation with adjacent tax specialty services like the §179D energy deduction and R&D tax credits.
This makes ETS a fit for owners with more complex tax situations beyond a single rental property, but it also means cost segregation isn’t the sole focus of the engagement.
Who it’s for: Owners or businesses stacking multiple specialty tax studies in one year.
Features:
- Cost segregation plus §179D, R&D credit, and green building certification services
- In-house licensed engineers
- Handles both commercial and residential rental property
Pricing: Custom quote, typically $6,000-$15,000+ for a standalone cost segregation study.
Limitations: Priced and scoped for multi-service engagements, so a single STR owner just needing a depreciation study pays for infrastructure they won’t use.
5. Madison SPECS — Best for owners wanting an established regional firm
Madison SPECS has run cost segregation studies for commercial and residential rental owners for years, primarily through a direct-quote sales process.
It’s a solid option for owners who want a phone consultation before committing, though pricing and timelines aren’t published upfront.
Who it’s for: Owners who prefer a consultative sales process before engaging.
Features:
- Custom-scoped engineering studies
- Consultation-first sales approach
- Handles both residential rental and commercial assets
Pricing: Custom quote, not published; comparable firms in this tier run $5,000-$12,000.
Limitations: No published flat fee and no stated turnaround time, so budgeting requires a sales call first.
6. Bedford Cost Segregation — Best for owners near a regional office
Bedford Cost Segregation is a regional engineering firm offering in-person site visits and consultations for property owners in its service areas.
The in-person model appeals to owners who want a face-to-face walkthrough, but it limits scale and speed compared to remote, document-based providers.
Who it’s for: Owners who prioritize in-person engineer visits over speed or flat pricing.
Features:
- On-site engineering visits
- Regional service area coverage
- Custom study scoping per property
Pricing: Custom quote, typically $4,000-$10,000 depending on property and region.
Limitations: Service area is regional, not national, and the on-site visit requirement adds scheduling lead time most STR owners don’t need for a single-property study.
Comparison table
| Company | Best for | Starting price | Free estimate | Key differentiator |
|—|—|—|—|—|
| Virtual Cost Segregation | STR & residential rental owners nationwide | $2,200 flat | Yes | No site visit, 3-5 business day turnaround |
| KBKG | Large commercial portfolios | ~$8,000+ | Varies | In-house engineers, Form 3115 filings |
| CSSI | Mid-size rental property | ~$5,000+ | Yes | Regional rep network |
| Engineered Tax Services | Owners stacking multiple tax credits | ~$6,000+ | Varies | Bundles §179D and R&D credits |
| Madison SPECS | Owners wanting a consultative process | ~$5,000+ | Consultation only | Direct-quote sales process |
| Bedford Cost Segregation | Owners wanting in-person visits | ~$4,000+ | Varies | Regional in-person engineering visits |
FAQ
Does a cost segregation study work for a single Airbnb or VRBO property?
Yes, as long as the owner materially participates in managing the short-term rental. Virtual Cost Segregation and most firms on this list run studies on single-property STR portfolios, not just large commercial buildings.
How much does a cost segregation study cost in 2026?
Costs range from $2,200 for a flat-fee virtual provider like Virtual Cost Segregation up to $15,000+ for custom-scoped commercial studies from firms like KBKG or Engineered Tax Services, depending on property size and whether a site visit is required.
Do I need a site visit for a residential rental or STR study?
Not always. Several firms, including CSSI and Bedford Cost Segregation, still require or default to an on-site engineer visit for larger properties, while Virtual Cost Segregation builds its report from documents and photos without one.
Is bonus depreciation still available in 2026?
Current federal tax law reinstated 100% bonus depreciation for qualified property acquired after January 19, 2025, which means a cost segregation study filed this year can still push a large share of reclassified basis into an immediate deduction — check with your CPA on how it applies to your specific filing year.
Does the report get filed with the IRS?
No. A cost segregation report from any of these companies is a supplementary, audit-defensible document your CPA uses to prepare your actual tax return — it is not itself submitted to the IRS.
What happens if the IRS audits my cost segregation study?
Firms that build studies to the IRS Audit Technique Guide standard, including Virtual Cost Segregation, KBKG, and Engineered Tax Services, include audit support as part of the engagement so the original engineering work backs up the reclassification if questioned.
Which cost segregation company should you pick
Virtual Cost Segregation is the right call for most residential and short-term rental owners who want a flat $2,200 fee, a 3-5 business day report, and no site visit standing between them and a completed study before their CPA files. Owners with large commercial or multi-property portfolios are better served by a custom-scoped firm like KBKG or Engineered Tax Services, and owners who specifically want an in-person engineer walkthrough should look at CSSI or Bedford Cost Segregation instead.
For a single STR property or a small residential rental portfolio, the math tends to favor whichever cost segregation company gets you a compliant report fastest and cheapest without cutting corners on the engineering methodology — and in 2026, that’s still the deciding factor between these six.
