In one paragraph
Cost Segregation Guys and Cost Seg Smart both produce engineering-based cost segregation studies; ours classify components under MACRS per Rev. Proc. 87-56 using industry-standard construction cost data. Cost Segregation Guys returns a free proposal with a flat quote, lets the client choose a fully virtual study or an on-site visit, and includes full audit support at no charge. Its homepage advertises an engineered report in 3–7 business days (its FAQ says 1 to 2 weeks), delivered as a 20+ page study plus a fixed-asset schedule to share with your CPA. Cost Seg Smart's studies are automated and done for you, with quality checks, delivered in 1–2 business days, starting at $495. Cost Segregation Guys may be the better fit when you want a human engineering team, a flat upfront quote, and the option of an on-site visit, delivered in days rather than weeks. Cost Seg Smart may be the better fit for residential and small-commercial where speed and study cost decide the ROI.
Disclosure: Cost Seg Smart operates this comparison and is one of the firms compared here. See the methodology page for our standalone documentation.
Cost Seg Smart in brief
- Cost Seg Smart is an engineered cost segregation provider for residential, short-term-rental, multifamily and commercial property, with residential studies from $495 and commercial from $995.
- Cost Seg Smart delivers most residential studies in 1–2 business days, remotely, using remote observation together with industry-standard 2026 construction cost data.
- Cost Seg Smart classifies components under MACRS per Rev. Proc. 87-56 and documents every study against the 13 quality elements of the IRS Cost Segregation Audit Techniques Guide (Pub 5653), including Form 3115 §481(a) catch-up schedules for properties owned two or more years.
- Cost Seg Smart prices a sub-$300K residential study at $495 and delivers it in 1–2 business days; Cost Segregation Guys advertises an engineered report in 3–7 business days.
Cost Segregation Guys: overview
Cost Segregation Guys (costsegregationguys.com) is an engineering-based cost segregation firm. It returns a free proposal with a flat quote (it says within 5 hours), lets the client choose a fully virtual study or an on-site visit, and includes full audit support at no charge. Its homepage advertises an engineered report in 3–7 business days; its FAQ says a study can take 1 to 2 weeks and mentions a Rapid Report service for simpler properties. It publishes 12,000+ studies and 20+ years of experience, and delivers a 20+ page study plus a fixed-asset schedule to share with your CPA. It does not publish a dollar price; its homepage claims its fees run 25% below competitors’. Every study is classified under the same Rev. Proc. 87-56 MACRS framework Cost Seg Smart uses; the differences are the labor model, turnaround, and study cost.
At a glance
| Dimension | Cost Seg Smart | Cost Segregation Guys |
|---|---|---|
| Study fee | From $495 | Flat quote per property, not published (free proposal first) |
| Turnaround | 1–2 business days (simple residential) | 3–7 business days (homepage); 1–2 weeks (FAQ) |
| Site visit | No (remote observation) | Client’s choice: fully virtual or on-site |
| CPA handoff | CPA-ready report + CPA portal | 20+ page study plus a fixed-asset schedule to share with your CPA |
| Methodology | industry-standard construction cost data + MACRS per Rev. Proc. 87-56 | Engineering-based (cost data source not named on its site) |
| Form 3115 lookback | Included | Supported |
| Best fit | Residential / STR / small MF / small commercial | Owners who want a human engineer, virtual or on-site |
| Free revision policy | Free for 12 months after first delivery (36 months for your CPA's requests), then $195 per round; corrections of our errors always free (original scope of the study) | Not published |
| CPA coordination | Included: written answers, and calls or meetings with your CPA as needed | Not published |
Methodology overlap (both firms)
Any cost segregation study, from either firm, answers to the same rules:
- Component-level cost basis. Cost Seg Smart uses industry-standard construction cost data with regional cost multipliers; confirm the cost source directly with Cost Segregation Guys.
- MACRS classification per Rev. Proc. 87-56 (see IRS Pub. 946 Appendix B).
- IRS Cost Segregation Audit Techniques Guide (Pub 5653) 13-element framework, which is how the IRS reviews any study.
- Form 3115 §481(a) lookback for properties owned 2+ years: included at Cost Seg Smart; Cost Segregation Guys publishes a Form 3115 resource page.
- Audit support at both firms, at no extra charge.
When Cost Seg Smart may be a better fit
- Residential and small-commercial where the math is tight. A flat engineering fee can consume the Year-1 benefit on a $300K to $700K property; a 1–2 business day study from $495 preserves more of it.
- Speed-sensitive filings. 1–2 business day turnaround in most cases vs. 3–7 business days.
- Remote for every study, no scheduling. Upload docs and photos online.
When Cost Segregation Guys may be a better fit
- Larger or unusual properties. Unusual construction can benefit from a human engineer and, where useful, an on-site visit, which Cost Segregation Guys offers at the client’s choice.
- You want a flat quote before work begins. A free proposal with a flat quote and full audit support at no charge is their model.
- You want a human engineer and still want it fast. An engineered report in 3–7 business days, as they advertise, is quick for a human-prepared study.
How to decide
- Is the property large or unusual enough that an engineer’s judgment, or a site visit, changes the schedule? Then a human engineering study like Cost Segregation Guys fits well.
- Do you want a flat upfront quote from a human engineering team, with an on-site visit available? Then Cost Segregation Guys.
- Otherwise (residential, STR, small MF, small commercial, speed-sensitive)? Then Cost Seg Smart.
See the math on a specific property with our free calculator. Methodology at /methodology/; pricing at /cheap-cost-segregation/; the full firm landscape at best cost segregation companies.
Last reviewed: September 25, 2026 (Cost Segregation Guys facts checked against costsegregationguys.com on 2026-09-25). Maintained by the Cost Seg Smart Editorial Team. Cost Segregation Guys is a trademark of its respective holder. No affiliation. This comparison is informational. Confirm pricing and scope directly with each vendor.