ETS vs. Direct Competitors
Engineering Expertise or Software — Why Not Both?
A direct look at how Engineered Tax Services compares to the other independent cost segregation specialists, and to the growing field of DIY and remote cost seg tools.
Independent Specialist Comparison — 2025
Provider | Founded | In-House Engineers | Level of Detail | Avg. Components Identified | Minimum Project Size | Site Visit | Turnaround | Typical Pricing | Model |
Engineered Tax Services | 2001 | Large dedicated team | Full MEP / structural system breakdown | 30–45 | No firm minimum | In-person, nationwide | 4–6 weeks | $$ value-priced | Engineering firm + technology platform |
CSSI | 2003 | Rep-network model | Standard component breakdown | Not published | Lower / no stated minimum | Varies by rep | ~2–3 weeks | $ low-cost | Independent rep/franchise network |
Tri-Merit | ~2018 | Mid-size team | Full MEP / structural system breakdown | Not published | Moderate | Varies | Not published | $$ mid-market | CPA-facing specialty tax outsourcer |
McGuire Sponsel | 2007 | Mid-size team | Full MEP / structural system breakdown | Not published | $2M+ | In-person standard | Not published | $$ mid-market | CPA-facing specialty tax advisory |
Source Advisors | 1983 | Mid-size team | Standard component breakdown | Not published | Moderate | Single-office based | Not published | $$ mid-market | PE-owned specialty tax firm |
DIY/Remote Platforms | Varies | Minimal or none | Limited, high-level estimate only | Not published | Small properties only | Remote only | Days, automated | $ lowest-cost | Self-service software |
Average components identified and minimum project sizes reflect a combination of firsthand market experience and general industry positioning; ETS's component range and McGuire Sponsel's $2M+ minimum are based on direct internal data and direct knowledge of the firm's engagement practice, respectively. Competitor component counts are not independently published and are not estimated here.
Capability Matrix
| Capability | ETS | CSSI | Tri-Merit | McGuire Sponsel | Source Advisors | DIY/Remote |
| Licensed in-house engineering staff | ✓ | Rep-based | ✓ | ✓ | ✓ | — |
| Full MEP/structural system breakdown | ✓ | — | ✓ | ✓ | — | — |
| Detailed component-level reporting (30–45 components/study) | ✓ | — | — | — | — | — |
| Mobile app for study management | ✓ | — | — | — | — | Varies |
| National in-person inspection network | ✓ | Rep-dependent | Limited | ✓ | Single-office | — |
| No minimum project size | ✓ | Partial | — | — ($2M+) | Partial | Small only |
| Adjacent tax incentive services (R&D, 179D, 45L) | ✓ | ✓ | ✓ | ✓ | ✓ | — |
| High-volume audit defense track record | ✓ | Claimed, unverified | Limited public data | ✓ | Limited public data | — |
Why Level of Detail Matters as Much as Who's Holding the Tablet
Not every cost segregation study is built the same way, and the difference shows up directly in the size of the benefit.
MEP and Structural Breakdowns Are the Real Differentiator.
A study that performs a full mechanical, electrical, and plumbing (MEP) and structural system breakdown identifies meaningfully more reclassifiable components than a study using standard, high-level component categories. Among the independent specialists, only ETS, Tri-Merit, and McGuire Sponsel consistently perform this level of granular analysis — firms relying on standard breakdowns alone are likely leaving real depreciation benefit on the table.
Component Count Is Where That Depth Shows Up.
ETS studies typically identify 30 to 45 individual components per property, reflecting the level of granularity that comes from a full MEP and structural breakdown performed by in-house engineers. Competitors performing standard, high-level breakdowns are not in a position to identify anywhere near that level of detail, since their categorization process isn't built to surface it.
A Granular Study Plus Real Reporting Is the Combination That's Missing Elsewhere.
Tri-Merit and McGuire Sponsel both deliver MEP-level technical rigor, which puts them ahead of CSSI and Source Advisors on study depth. But neither publishes the kind of detailed, component-level reporting that lets a property owner or CPA see exactly what was identified and why. ETS performs the same level of granular system breakdown and delivers that detail directly to the client.
Minimum Project Sizes Quietly Exclude Most Property Owners.
McGuire Sponsel's engagement model generally requires a minimum of $2 million in project value, and most of the independent specialists in this space — outside ETS — are built around moderate-to-larger properties rather than the full range of commercial and residential investment real estate. That leaves a meaningful gap for owners of smaller properties who still want a fully engineered, MEP-level study rather than a stripped-down alternative.
DIY and Remote Tools Trade Detail for Speed.
Software-first platforms are fast and inexpensive, but they're generally built for small, simple residential properties and produce a high-level estimate rather than a true component-by-component engineering breakdown. There's no MEP or structural analysis behind the number, which limits both the size of the benefit and its defensibility on audit.
ETS Built Both, On Purpose.
ETS performs full MEP and structural system breakdowns on every study — typically identifying 30 to 45 individual components — the same level of technical rigor as the most respected CPA-facing specialists, without a project minimum. That combination of depth, access, and transparency is the gap most of the rest of the market hasn't closed.
ETS vs. Direct Competitors
Engineered Tax Services
West Palm Beach, FL · 26 offices nationally Verdict: Engineering depth and detail, not a tradeoff. ETS is a licensed engineering firm staffed by engineers, CPAs, and tax attorneys, performing over 10,000 cost segregation, 179D, and R&D studies a year with a 26-office national footprint for in-person inspections. Every study includes a full MEP and structural system breakdown, typically identifying 30 to 45 individual components per property, with no minimum project size — meaning smaller property owners get the same level of engineering rigor and reporting detail as ETS's largest clients.
CSSI
Baton Rouge, LA · independent rep network Verdict: Low cost and fast, but lighter on technical depth. CSSI has built genuine national volume through a network of independent local representatives and competitive flat-rate pricing — a real strength for cost-conscious owners of smaller properties. The tradeoff is twofold: study depth typically relies on standard component categorization rather than a full MEP or structural breakdown, and with delivery distributed across independent reps rather than a centralized engineering team, methodology consistency can vary by who is assigned to your property.
Tri-Merit
Schaumburg, IL Verdict: Strong technical depth and CPA relationships, light on reporting detail. Tri-Merit performs full MEP and structural system breakdowns, putting its technical rigor on par with the most respected names in the independent space. Its model is built around the CPA relationship rather than direct, self-service access for property owners, and it doesn't publish the kind of granular, component-level detail ETS provides — most of the engagement runs through traditional account management and summary-level reporting.
McGuire Sponsel
Indianapolis, IN Verdict: Deep technical bench, but a $2M+ project minimum. McGuire Sponsel, strengthened by its 2019 merger with longtime cost segregation firm Ernst & Morris, performs full MEP and structural breakdowns and has one of the more technically respected engineering teams in the independent space. The real limitation is access: a stated $2 million minimum project size puts the firm out of reach for most small and mid-size property owners looking for that same level of engineering depth.
Source Advisors
Fort Worth, TX · 1 office Verdict: Long tenure, but standard-depth studies from a single office. Source Advisors brings decades of tenure in the specialty tax space and a real engineering bench, though its studies generally rely on standard component breakdowns rather than full MEP-level analysis. Operating from a single Fort Worth office also limits in-person inspection capacity at national scale.
DIY/Remote Cost Seg Tools
Software-first, self-service platforms Verdict: Cheapest and fastest, weakest on detail and audit defense. Remote, software-driven platforms have made basic cost segregation estimates fast and inexpensive — appealing for owners of small, straightforward residential rentals. The fundamental limitation is twofold: the absence of a licensed engineer's in-person inspection, and a high-level estimate rather than a true component-by-component MEP or structural breakdown. For anything beyond a simple, low-value property, the savings on the front end can carry real risk — and a meaningfully smaller benefit — on the back end.
Pick the Axis You're Willing to Sacrifice — Or Don't
Every independent provider in this space is strong somewhere: low cost, deep engineering tenure, tight CPA relationships, or fast self-service software. Almost none combine real MEP-level engineering depth, no project minimum, and detailed component-level reporting — most ask you to give up at least one.
- Full MEP and structural system breakdown, not a standard high-level estimate
- Detailed, component-level reporting clients can actually see
- No minimum project size that excludes smaller owners
- Licensed, in-house engineering staff — not a rep network or subcontractor
- In-person inspections backed by a national office footprint
- Transparent, value-based pricing
- Direct access for property owners and CPAs alike
Direct Comparison FAQs
What's the difference between a standard component breakdown and a full MEP study?
Most CPA firms aren't licensed engineering firms and don't have in-house engineers, which the IRS Cost Segregation Audit Techniques Guide identifies as a key factor in a defensible study. Many large firms subcontract the engineering work; a dedicated specialist performs it in-house from start to finish.
Are DIY cost segregation tools accurate?
Pricing at large multi-service firms is generally tied to overall engagement scope and standard advisory billing rates, rather than a study-specific flat or value-based fee. A specialist's entire cost structure is built around this one service, which typically results in more competitive, transparent pricing.
Is my property too small for a cost segregation study?
At some large multi-service firms, yes — the engagement model isn't economically built for smaller properties. A dedicated specialist's cost structure is built to serve a much wider range of property sizes without a hard minimum.
Is a cheaper cost segregation study ever the wrong choice?
At several large multi-service firms, yes — cost segregation is often only available to clients already engaged for audit, tax, or advisory services. A dedicated specialist is built to take on cost segregation engagements directly, with no prior relationship required.
How many components should I expect a quality study to identify?
Not necessarily. Audit defense quality depends on the depth and consistency of the underlying engineering methodology and documentation, not the overall size of the firm. A specialist that performs studies at high volume, day in and day out, often has more direct, repeatable audit experience than a generalist firm where cost segregation is a smaller practice area.
Important Disclaimer: This comparison reflects our independent analysis based on publicly available information and direct firsthand market experience regarding each firm's services, structure, and market positioning as of 2025. It is not an official endorsement, certification, or guarantee of performance by any third party. Characterizations of competitor capabilities (engineering staffing model, level of detail, and pricing tier) reflect general industry positioning and direct market experience rather than confirmed internal data published by those firms, except where specifically noted (ETS's average component count and McGuire Sponsel's stated project minimum, both based on direct internal/firsthand data). Competitor component counts are not published or estimated, and are intentionally left blank rather than guessed. Readers should perform their own due diligence and request a direct quote and methodology overview before selecting a provider.