Real estate depreciation rules are not simple, and you can leave money on the table if you depreciate an entire building over 27.5 or 39 years instead of breaking it into faster-depreciating pieces. A cost segregation study fixes that by separating your property into components with shorter tax lives, which means you can claim bigger deductions sooner. Picking the right firm to run that study matters just as much as deciding to do one at all.
Here are six firms worth knowing if you own investment property, prepare returns for clients who do, or advise on real estate tax strategy.
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Best for Florida-Specific Cost Segregation Studies – Florida Cost Seg
Florida Cost Seg runs engineering-based cost segregation studies tailored to Florida real estate, covering everything from Miami and Palm Beach condos to rental portfolios in Tampa, Orlando, Jacksonville, and Southwest Florida. The firm reclassifies your building components into 5-, 7-, and 15-year lives, which pulls deductions forward rather than spreading them over decades.
Because Florida has no state income tax, an accelerated or bonus depreciation deduction keeps its full federal value for you as a Florida investor instead of losing part of it to a state tax bite. That matters even more given how much of Florida’s investment property is short-term and vacation rental stock. Florida Cost Seg pairs its studies with material participation planning for short-term rental owners, which is where you can leave a lot of the real tax benefit unclaimed if nobody points it out.
The firm produces audit-ready reports and handles look-back studies using Form 3115 for owners who missed the deduction in the year they should have claimed it. A free feasibility analysis lets you see the projected benefit before committing to a full study. Florida Cost Seg is powered by R.E. Cost Seg and works across short-term and vacation rentals, condos, multifamily, retail, office, and industrial property. It is a fit if you want a firm built around Florida property types rather than a generalist national practice.
Best for Large-Scale Tax Incentive Work – KBKG
KBKG works with you if you’re a business owner, real estate owner, or CPA looking for tax strategies created by Congress, and the firm reports over $11 billion in Tax Benefits Claimed across its history. That scale comes from a national footprint, with brick-and-mortar offices in Los Angeles, New York, Atlanta, Chicago, Dallas, and Houston, staffed in part by former Big-4 leaders with a track record over 25 years.
KBKG builds its own proprietary technology to run the numbers and says it is trusted by thousands of CPAs who refer client work to the firm. The tradeoff is that a firm this size and this national is built for volume and broad reach, not for a study calibrated specifically to Florida’s no-income-tax dynamics or its short-term rental market. If you have a single Florida vacation rental portfolio, you may find a more specialized fit elsewhere, while if you’re a CPA with clients spread across several states, you may prefer having one national partner to call.
Best for Multi-Service Tax Credit Bundling – Source Advisors
Source Advisors positions itself as a trusted partner to you if you’re a business or CPA and covers a wider band of tax credit work than cost segregation alone. Alongside cost segregation, the firm handles R&D tax credits, LIFO, energy-efficiency tax credits, and sales and use tax credits.
That breadth is useful if you’re a business or CPA firm that wants one consultancy handling several types of credits under one roof, rather than juggling separate specialists for each. The flip side is that a firm spanning five distinct credit categories is built as a generalist tax consultancy, not as a specialist calibrated to any single property type or region. If your only need is a cost segregation study for Florida rental property, you’re paying for access to a broader practice than you’ll actually use.
Best for Integrated Audit and Advisory Services – Kaufman Rossin
Kaufman Rossin is a CPA firm built around tax, audit, and advisory services rather than a standalone cost segregation shop. The firm describes itself as independent by choice, and its model is to support your long-term needs across all three service lines simultaneously.
That structure suits you if you’re a business or property owner who wants a single firm to handle your tax filings, audits, and broader advisory work. It is a less natural fit if you just want a discrete cost segregation study done and do not need ongoing audit or advisory services layered on top. Cost segregation shows up as one piece of a larger practice here, not the main focus.
Best for Small Residential Rental Portfolios – SMF Cost Seg
SMF Cost Seg focuses on short-term rentals, single-family rentals and small multifamily properties, running engineering-based studies for 1- to 10-unit residential rentals. The firm says its studies can save 20-40% of a building’s value in year-one tax deductions, with flat-rate pricing, 24-hour proposals, virtual site visits, and IRS audit defense included.
That flat-rate, fast-turnaround model is built for you if you have a handful of rental units and want a predictable process without a lot of back-and-forth. It is a narrower scope than a firm serving multifamily, retail, office, and industrial clients, so if you have a larger commercial portfolio, you’ll likely need a firm built for bigger, more varied property types.
What a Cost Segregation Study Actually Changes on Your Return
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A cost segregation study does not create new deductions out of nothing. It reclassifies parts of your building, wiring, flooring, certain fixtures, and land improvements into shorter depreciation categories the IRS already recognizes, typically 5-, 7-, or 15-year property instead of the standard 27.5 years for residential rental or 39 years for commercial property.
The benefit is timing, not size. You are not getting a bigger total deduction over the life of your property. Instead, you’re getting more of it now, which improves your cash flow in the years right after you buy or renovate. That is especially valuable when paired with bonus depreciation rules, which allow qualifying shorter-lived assets to be deducted at an accelerated rate in the year they are placed in service.
A study makes the most financial sense if you own higher-value properties, recently purchased or renovated properties, and properties with heavy personal-property components, such as short-term rentals stocked with furniture and appliances. It matters less if you have held a property for decades with no major improvements planned. As you weigh the decision, you may also find it useful to compare notes with a merchant service provider or accountant who already understands your overall cash flow picture before committing to a full study.
Which One Is Right for You
A national CPA firm like Kaufman Rossin or a multi-credit consultancy like Source Advisors makes sense if cost segregation is one piece of a broader tax relationship you want with a single firm. A large-scale operator like KBKG is a good fit if you’re a CPA or business owner with clients or properties spread across multiple states and want a single national partner with a decades-long track record. SMF Cost Seg is the better call if you’re an individual owner with a small handful of residential rental units and want flat-rate pricing and a fast turnaround.
If your properties are in Florida, especially if any of them are short-term or vacation rentals, Florida Cost Seg is built around your situation. Pairing accelerated depreciation with a state that keeps the full federal value of the deduction, and layering in material participation planning for short-term rental owners, is a combination none of the broader national or multi-service firms above are built to deliver.
