An honest, side-by-side comparison of the leading cost segregation options in 2026 — pricing, speed, methodology, and what you actually get.
There are three categories of cost segregation services: DIY software (you do the work), automated done-for-you (you provide basics, they handle the rest), and traditional engineering firms (full-service, premium price). Here's how they compare.
| Cost Seg Smart | KBKG | Traditional Firms | |
|---|---|---|---|
| Type | Done-for-you (automated) | DIY software + full-service | Full-service engineering |
| Residential Price | $495 – $1,295 all-in | $495 (DIY) / $2,500+ (full-service) | $3,000 – $8,000 |
| Commercial Price | $995 – $2,995 | $1,295+ (DIY) / $5,000+ (full-service) | $5,000 – $25,000+ |
| Price Transparency | ✓ Shown on site | Base price shown (final varies) | Quote required |
| Turnaround | <1 hour | DIY: you do the work / Full-service: 2–4 weeks | 4 – 8 weeks |
| Customer Effort | None — we handle it | High (DIY) / None (full-service) | None — full service |
| Engineering-Based | ✓ | ✓ | ✓ |
| Site Visit Required | No | No | Sometimes |
| Report Length | 40+ pages | Varies | Varies |
| Component Breakdown | ✓ 200+ components | ✓ | ✓ |
| Dedicated Land Valuation | ✓ Multi-source pipeline | DIY: user inputs / Full: appraiser | ✓ Appraiser-based |
| Regional Cost Calibration | ✓ 200+ metro areas | ✓ National data | ✓ Local knowledge |
| FF&E / STR Support | ✓ Full modeling | ✓ | ✓ |
| Audit Documentation | ✓ Included in report | ✓ | ✓ |
| Audit Defense Documents | ✓ Free — included | DIY: not included / Full: included | Varies (often extra fee) |
| Audit Support | ✓ Included at no cost | ✓ Full-service only | Varies (often extra fee) |
| CPA-Ready Guarantee | ✓ Money-back | — | Varies |
| Commercial Properties | ✓ Full support | ✓ | ✓ |
| Services Included | Cost seg + lookback studies + property tax appeal screening | Cost seg, R&D credits, 179D, 45L, fixed assets | Typically cost seg only |
| Typical ROI | 30–60x | 5–30x (varies by tier) | 5–15x |
You provide basic property info (address, purchase price, year built, square footage). We pull county assessor data, run 200+ component models calibrated to your region, and deliver a 40+ page CPA-ready PDF report in under 1 hour. No data entry, no site visit, no waiting.
KBKG is one of the most established names in cost segregation. They offer CostSegregation.com (a self-guided DIY software tool starting at $495) and traditional full-service studies through their engineering team ($2,500+). They also provide R&D tax credits, 179D, and 45L services. Founded in 1999 with CCSP-certified professionals.
National and regional firms that assign a dedicated engineer. Includes on-site inspections, detailed blueprint review, and extensive documentation. The gold standard — at a gold-standard price.
Side-by-side analysis with specific providers.
If you want the lowest starting price and don't mind doing the work yourself, DIY software tools start around $495 — though the final cost typically scales with your property's basis and add-ons. You'll need to input all property data accurately, including land value, and the quality of your report depends entirely on the quality of your inputs.
our Airbnb tax strategy guide →
If you want a hands-off experience with fast delivery, Cost Seg Smart ($795) is the clear choice. You provide basic property info and receive a 40+ page CPA-ready report in under 1 hour — with a money-back guarantee if your CPA can't use it.
If you have a large commercial property or need expert witness support, a traditional engineering firm is worth the premium. For a $5M+ commercial building, paying $10,000 for a study that identifies $500K+ in accelerated deductions is still an excellent ROI.
For most residential investors — especially STR/Airbnb owners — the automated options deliver the same IRS-defensible results as traditional firms at a fraction of the cost and time. The math is simple: a $795 study on a $750K property typically identifies $50,000–$70,000 in Year 1 tax savings. That's a 60x+ return on investment. For a broader look at how all 25 active providers compare on pricing, turnaround, and methodology, see CostSegregationReviews.com. For options specifically under $1,000, see our guide to cheap cost segregation.
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