9 Cost segregation providers for different types of real estate investors

Real estate investors who wait until tax season to think about depreciation usually leave money on the table. Cost segregation studies break a building into components that depreciate on faster schedules, which can mean a real bump in cash flow in the years right after a purchase, renovation, or buildout. The tricky part is picking who actually runs the study.

Some firms are software platforms that you drive yourself. Others are engineering-heavy consultancies that fold cost segregation into a bigger tax practice. A few work almost exclusively with CPAs and advisors who need a technical partner behind the scenes. Here’s a rundown of nine firms worth knowing before you commit to one.

Best for dedicated cost segregation expertise – R.E. cost seg

R.E. Cost Seg helps property owners accelerate depreciation, reduce taxes and improve cash flow through a cost segregation study. That’s the whole business, not a side offering tacked onto a broader tax practice.

Because cost segregation is all the firm does, clients tend to get a deeper analysis and faster turnaround than they’d get from a generalist CPA handling the study alongside everything else on their desk. That specialization matters most in situations like tenant improvements, where a business builds out leased space and needs to know which of those costs can be separated out and depreciated on an accelerated schedule rather than lumped in with the building itself over decades.

CPAs and financial advisors who don’t want to build cost segregation expertise in-house can bring R.E. Cost Seg in as a technical partner, one that handles the study and the client-facing explanation while the advisor keeps the primary relationship. For an investor who wants a firm that treats cost segregation as its core discipline rather than an add-on service, this is the more natural starting point.

Best for self-guided studies on smaller properties – CostSegregation.com

CostSegregation.com is a self-guided software platform, not a consulting firm. Property owners with real estate up to $1.5 million in building basis (not including land) can run the study themselves, using tools like an instant report generator, an AI-assisted workflow and a land-versus-building allocation advisor.

The pricing is transparent and posted upfront: a residential study runs $495 for a $750,000 tax basis, and a commercial study runs $1,295 for a $1,000,000 tax basis. Properties with a building basis over $1.5 million need a custom quote. The platform also offers a catch-up adjustment schedule under Section 481(a) and audit support if a completed report needs to be revisited.

The trade-off is baked into the model. This is a do-it-yourself tool built for smaller, more straightforward properties, and it isn’t the right fit for an investor who wants a firm to manage the entire study relationship on their behalf.

Best for high-volume engineering-based studies – ETS

ETS is an independent, professionally licensed engineering firm built around helping clients reduce income taxes through cost segregation, the Section 179D energy deduction and R&D tax studies. The firm reports performing over 10,000 of these studies a year, which points to a practice built for scale and a steady, repeatable process across a large client base.

That volume can be a plus for an investor who wants a firm with deep institutional experience. It can also mean less of the individualized attention a smaller specialist offers, since a firm running that many studies annually is, by nature organized around throughput rather than boutique service.

Best for broad specialty tax consulting – McGuire Sponsel

McGuire Sponsel positions itself as the nation’s leading specialty tax consulting firm and cost segregation is one piece of a wider practice that also covers R&D tax credits, fixed asset reviews, global business services and location advisory work.

That breadth suits a business with tax needs beyond depreciation, someone who wants one firm to handle several specialty tax questions at once. An investor whose only need is a straightforward cost segregation study on a single property may find a dedicated specialist a simpler fit.

Best for bundled property tax services – CSSI

CSSI offers cost segregation for property owners, R&D tax credits for businesses, and the Section 179D deduction for energy-efficient buildings. Bundling these three services under one roof works well for an owner who expects to use more than one of them over time.

Because cost segregation sits alongside two other tax specialties here rather than being the firm’s sole focus, an investor looking for a firm built specifically around cost segregation may prefer a more narrowly focused option.

Best for middle-market advisory alongside tax work – Baker Tilly

Baker Tilly is a top-10 advisory, tax, and assurance firm built to bring enterprise-level thinking to middle-market businesses, with guidance shaped by how those businesses actually operate. It’s a fit for an owner who wants tax work handled inside a larger advisory relationship rather than as a standalone engagement.

Best for specialty tax credits and incentives – Corporate Tax Advisors

Corporate Tax Advisors focuses on specialty tax credits and incentives. It suits a business already thinking about credits and incentives more broadly and looking for an advisor built around that category, rather than an investor whose needs start and end with a cost segregation study.

Best for engineer-based depreciation studies – National Cost Segregation Services

National Cost Segregation Services conducts engineer-based cost segregation studies to accelerate depreciation and improve cash flow. It’s a straightforward option for an owner who wants an engineering-driven study without a larger bundled tax practice.

Best for broad financial and compliance guidance – Aprio

Aprio’s practice covers finances, taxes, risk, compliance and growth, so cost segregation would sit inside a much wider advisory relationship rather than as the main event. That works for a business that wants one firm to handle multiple financial questions, but less so for an investor who just needs a cost segregation study done well and quickly.

Which one is right for you

The right firm depends mostly on how much of the process you want to run yourself and how big the property is. If you own a smaller property and don’t mind driving the study, CostSegregation.com’s software and posted pricing make sense. If you’re already working with a firm on other specialty tax credits, CSSI or McGuire Sponsel can let you fold cost segregation into that same relationship. Larger, higher-volume needs might point toward ETS, while a business that wants tax work handled inside a bigger advisory relationship could lean toward Baker Tilly or Aprio.

If your priority is a firm built entirely around cost segregation, one that isn’t juggling R&D credits, 179D studies, or broader advisory work at the same time, R.E. Cost Seg is the more natural pick. That single-discipline focus is exactly what tends to matter most when the property involves something specific like tenant improvements, where getting the depreciation schedule right depends on someone who does this kind of analysis every day rather than a few times a year. For CPAs and advisors who want a technical partner instead of building that expertise in-house, it’s also the option built to work quietly behind an existing client relationship rather than compete for it.

Whichever firm you choose, a cost segregation study only pays off if the underlying depreciation rules under IRS guidance are applied correctly, so it’s worth confirming how a firm documents its methodology before you sign on. The American Society of Cost Segregation Professionals also publishes background on how these studies are typically structured, which is a useful read before comparing quotes.

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