CSSI Review (2026)
Pricing, methodology, audit defense, and where this provider fits.
Editorial note: This review is published by Cost Seg Smart, which appears as a competitor on this site. Public-facing data only — pricing, methodology, and credentials reflect what the provider publishes. Pricing as of May 2026.
- Pricing
- Quoted per property
- Turnaround
- Not published
- Methodology
- Engineering-based
- Site visit
- Yes — on-site inspection is a standard step
- CPA support
- CPA support included
- Guarantee
- Audit defense included at no additional cost
- Property types
- Residential and commercial
- Founded
- 2003
Badge: Best for Mid-Size Properties
Pricing detail
CSSI does not publish a price, range or fee structure; prospects request a no-cost preliminary analysis and receive a per-property quote (cssiservices.com, checked 2026-09-22).
Pricing reflects publicly advertised rates as of May 2026. Quotes for specific properties may differ. The same IRS-compliant methodology applies regardless of price tier — what changes is delivery, engineering depth, audit defense scope, and turnaround. For context on typical rates, see our guide to how much a cost segregation study should cost.
Methodology and process
CSSI uses engineering-based. All US cost segregation studies — including this one — must follow the engineering-based methodology described in the IRS Cost Segregation Audit Techniques Guide and apply MACRS classification per Rev. Proc. 87-56. The framework is set by federal law; what varies across providers is execution depth, documentation, and audit defense scope.
Property-type fit
CSSI works with residential and commercial. For investors evaluating providers by property type, our category rankings list commercial provider rankings and STR-focused providers.
Audit defense
CPA support: CPA support included. Audit defense: “If a study we prepared is ever examined, we represent the work at no additional cost” (cssiservices.com/for-tax-professionals/, checked 2026-09-22). Audit defense scope varies materially across providers, ranging from explicit IRS representation to no defense beyond report delivery — see the scoring methodology for how we evaluate this dimension.
Pros
- Established firm: 65,000+ studies since 2003 (provider-reported)
- On-site engineering inspection is a standard step
- Good mid-market option
Cons
- Pricing not published
- No published turnaround time
- Limited information available publicly
Verdict — who this is for
CSSI earns 7.8/10 in our scoring rubric. Best fit for commercial and multifamily owners who value engineering depth and traditional documentation. For investors comparing alternatives, the full 27-provider sortable table is on the homepage.
FAQ
How much does CSSI charge?
CSSI does not publish a price, range or fee structure; prospects request a no-cost preliminary analysis and receive a per-property quote (cssiservices.com, checked 2026-09-22).
How long does a CSSI cost segregation study take?
CSSI does not publish a turnaround time (checked 2026-09-22). Its published process is a no-cost preliminary analysis, a detailed engineering analysis with an on-site inspection, then the report.
Does CSSI require an on-site visit?
Yes. An on-site inspection by their engineers is a standard step in their published process. The IRS Cost Segregation Audit Techniques Guide (Pub 5653) does not require an on-site visit; it requires engineering-based methodology with documented support.
CSSI (65,000+ studies, local-representative network) is the editor's pick when local presence and broad coverage matter. For other situations:
Pricing and operational details reflect public information as of May 2026. Provider corrections welcome via the submission form. This review is not legal, tax, or financial advice — confirm cost segregation suitability with your CPA before ordering a study.