A rental property depreciates on a fixed schedule unless someone steps in and changes the math. That’s the entire premise behind cost segregation: an engineer or tax specialist breaks a building into components, some of which qualify for a 5-, 7-, or 15-year recovery period instead of the usual 27.5 or 39. The payoff is a larger deduction in the early years of ownership, which means less taxable income and more cash sitting in an investor’s account instead of the IRS’s.
Not every firm that offers this service works the same way, though. Some are standalone cost segregation specialists. Others bundle it into a wider menu of tax credits and incentive work. A few sell software so an owner can run the numbers without hiring anyone at all. Here’s how six providers in this space actually differ, starting with a firm that treats cost segregation as its only line of work.
Best for Dedicated Cost Segregation Expertise – R.E. Cost Seg
R.E. Cost Seg helps real estate investors accelerate depreciation, cut their tax bill and free up cash flow through a cost segregation study. The pitch is straightforward: larger deductions arrive sooner, current taxable income can drop, and the cash that would have gone to taxes becomes available to reinvest somewhere else in a portfolio.
What sets the firm apart is what it doesn’t do. Cost segregation is the whole operation here rather than one service bolted onto a general accounting practice, so a study tends to get more scrutiny and move faster through review than one competing for attention against audits, bookkeeping and tax prep. For an investor who just wants the analysis done well and done promptly, that focus matters more than a long list of adjacent services.
It also shows up in how the firm works with other professionals. CPAs and financial advisors who’d rather not build an in-house cost segregation function can hand the technical study and the client conversations to R.E. Cost Seg, using it as a white-glove partner instead of a vendor they have to manage closely. That makes it a sensible fit for an advisor who wants to offer the service to clients without staffing up for it.
Best for National Scale Across Multiple Tax Credit Programs – KBKG
KBKG runs a much wider operation, covering R&D tax credits, 179D deductions, cost segregation, transfer pricing and transferable credits for businesses, real estate owners and CPAs across the country. The firm says it has helped clients claim $11 billion in tax benefits, and its team includes former Big-4 leaders with a track record built over 25 years.
KBKG also sells self-help software aimed at CPAs and small businesses who want to run parts of the analysis themselves rather than outsource it entirely. That’s a real point of difference from firms that only offer a fully managed study. The tradeoff is scope: with so many programs under one roof, an investor who wants a single-service specialist focused purely on cost segregation might find a narrower firm feels more tailored to that one task.
Best for High Study Volume and Engineering Credentials – Engineered Tax Services
Engineered Tax Services is a licensed engineering firm, not just a tax consultancy, and it leans on that credential across cost segregation, 179D and R&D tax studies. The firm performs 10,000 studies a year for clients throughout the United States, a volume that suggests a process built to handle a steady, high-throughput caseload.
Pricing runs on a custom quote based on project scope, so there’s no flat rate to compare against. The firm carries a 4.8/5 rating on Google Reviews, which gives prospective clients an outside signal beyond the company’s own description of its work. The scale that lets it process 10,000 studies annually also means an investor is one of many files moving through a large operation rather than a smaller, closer-knit shop.
Best for Self-Guided Software on Smaller Properties – CostSegregation.com
CostSegregation.com takes a different approach entirely: it’s self-guided software rather than a done-for-you study, built for properties up to $1.5M in building basis (not including land). The platform generates an instant report, uses AI assistance, and includes a land versus building allocation advisor along with audit support if a return gets questioned later.
Pricing is transparent and tiered. A residential property with a $750,000 tax basis runs $495, and a commercial property with a $1,000,000 tax basis runs $1,295. Properties over $1.5M in building basis need a custom quote instead. The software also offers a catch-up adjustment schedule under section 481(a), useful for an owner who missed accelerated depreciation in an earlier tax year and wants to claim it now. The catch is that this model suits a smaller, DIY-minded investor more than someone who wants an engineer walking the property and building the case in person.
Best for Broader European Incentive and Credit Work – Leyton
Leyton operates as an international consulting firm specializing in innovation funding, research incentives and performance optimization for businesses. Its services include national funding programs, EU funding, VAT compliance and research tax credits (Forschungszulage) for companies working within that framework.
This is a firm built around a European consulting practice rather than a U.S. Real estate depreciation specialty, which makes it a different kind of option from the others on this list. An investor whose needs are strictly U.S. Cost segregation will find the other entries here more directly aligned with that work.
Best for Specialty Tax Credits Beyond Depreciation – Corporate Tax Advisors
Corporate Tax Advisors positions itself around specialty tax credits and incentives generally, rather than cost segregation specifically.
What Actually Separates These Providers
The biggest fork in the road is whether an investor wants a study done for them or software to run the numbers themselves. CostSegregation.com fits an owner with a smaller property and a comfort level with self-service tools. Everyone else on this list sends an engineer or analyst to do the technical work directly, which costs more but produces a report built specifically for that building.
The second fork is scope. KBKG and Leyton both sit inside larger consulting practices that cover credits, incentives and compliance work well beyond cost segregation. That’s useful if an investor or their CPA also needs help with R&D credits or EU funding programs. It’s less useful if the goal is simply the deepest possible depreciation study, since that work competes for attention with every other service line the firm offers.
Property size matters too. CostSegregation.com caps its self-guided tool at $1.5M in building basis, while Engineered Tax Services’ volume (10,000 studies a year) suggests it’s built to handle properties of any size at scale. Before committing to any provider, an investor should also think about how a depreciation strategy fits into the rest of their financial planning, since a cost segregation study changes taxable income in ways that ripple into other decisions for the year.
For an investor who wants cost segregation handled as the firm’s primary focus rather than one item on a longer menu and for a CPA who’d rather hand off the technical study and client conversations than build that capability internally, R.E. Cost Seg is the entry on this list built specifically around that kind of partnership.