Best cost segregation companies in 2026: 10 firms compared.
There is no single best cost segregation company. The right one depends on your property. Below, 10 firms are compared on published price, turnaround, site visits and who each one fits, with every competitor fact linked to the firm's own website. New to the category? Start with the types of cost segregation companies. Shopping for a tool rather than a firm? See cost segregation software compared.
An engineering-based provider such as Cost Seg Smart (from $495, most residential studies delivered in 1–2 business days) fits most owners.
Cost Seg Smart with an in-person site visit added, or an engineer-led firm that inspects the property, such as Madison SPECS, Engineered Tax Services or Capstan.
Either way, the report's documentation, not the provider's location, is what the IRS evaluates.
The best cost segregation company for each kind of owner.
- Best for residential and short-term rentalsCost Seg Smart
Published prices from $495, and most residential studies are delivered in 1–2 business days.
- Best for large or specialty commercialMadison SPECS
Engineer-led studies with an on-site visit, aimed at property worth $1M or more.
- Best if you also need R&D or energy creditsEngineered Tax Services
Cost seg alongside R&D credits, §179D and §45L from one firm.
- Best for an on-site study with published fee rangesMaven Cost Segregation
Inspects every property and publishes general fee ranges.
- Best if you want a free proposal before committingSeneca Cost Segregation
A free proposal first, virtual or on-site review, and a conditional money-back guarantee.
- Best for doing it yourselfSelf-service software
The cheapest route if you can classify components yourself; see the software comparison.
Cost segregation companies compared: price, turnaround and site visits.
Competitor facts come from each firm's own website on the date shown under its name. Where a firm does not publish a price, the table says so rather than guessing.
Short-term rental: Furnishings and site improvements drive the study and are documented in listing photos and the closing file, so a remote study fits. Ranked on fit, published price and turnaround.
1 Cost Seg Smart Us Source: our pricing page #1: From $495, most STR studies in 1–2 business days Residential rentals, short-term rentals, multifamily and commercial property of any size, from a cost basis of $50,000 Engineering-based studies with component-level cost estimates and a basis reconciliation. Remote review is standard; in-person site visits are an add-on in all 50 states, with a priority option Most residential studies in 1–2 business days once documents are in; a 24-hour rush is available for an additional fee From $495 (single-family, short-term rental, condo); from $995 (commercial) CPA coordination included; IRS questions answered through your CPA at no charge. Free corrections whenever your CPA finds an issue on our side, then a refund if your CPA still can't use it
2 R.E. Cost Seg Checked Nov 8, 2026 Residential and commercial investors. Its Rapid Report is for residential up to 4 units with a depreciable basis under $1.2M Rapid Report: no site visit. Fully Engineered study: a 30–60 minute virtual inspection; in person for an extra fee Rapid Report about 5 business days; Fully Engineered about 15–20 business days Rapid Report from $950; Fully Engineered from $2,320 (residential) and $2,730+ (commercial) Not stated on the pages we read
3 Cost Segregation Guys Checked Nov 8, 2026 Residential and commercial rental property (no minimum stated) Virtual or on site, the client's choice 3–7 business days for the engineered report (home page); 1 to 2 weeks (FAQ) No fee schedule. Its own FAQ says fees typically range between $5,000 and $15,000 Not stated on the pages we read
4 Seneca Cost Segregation Checked Nov 2, 2026 Per their site: investment property worth at least $450,000, or $500,000+ of improvements, held 3+ years Virtual or on-site review, depending on the property and preference 2–4 weeks for most studies (FAQ); can prioritize for a deadline (no published timeframe) No fee schedule; free proposal first. Its own comparison page says fully engineered residential studies start at about $2,000 Works with your accountant; shares a draft for review (per Seneca FAQ). Revisions: not published
5 Maven Cost Segregation Checked Nov 2, 2026 Per Maven: properties of about $500,000 or more benefit most; owners who want an on-site study Yes, an on-site inspection on every study A few weeks after records and the site inspection (study page); within 30 days of the site visit (homepage) Published general ranges: $2,500–$4,000 for smaller properties; $5,000–$10,000+ for large or complex properties and portfolios. Its FAQ says $850–$1,500 for small to mid-sized properties and $3k and up for larger commercial Works with your existing CPA (per Maven). Revisions: not published
6 CSA Partners (Cost Segregation Authority) Checked Nov 8, 2026 Residential and commercial investors (no minimum stated) Site visit coordinated for investors; inspection when applicable 3–4 weeks from engagement (study page); 2–3 weeks after the site visit (investor page) From $3,000 Not stated on the pages we read
7 CSSI Checked Nov 8, 2026 Properties with a cost basis of at least $200,000 On-site inspection and walk-through About 3 to 6 weeks once documents are in No fee schedule. Its service page says a study typically ranges from $2,000 to $15,000 Not stated on the pages we read
8 Engineered Tax Services Checked Nov 2, 2026 Per ETS: commercial and investment property, generally at a depreciable basis of roughly $500,000 or more; owners who also want R&D or energy incentives Yes (on-site property inspection) 4–6 weeks typical (per ETS) Quote required (not published). ETS’s FAQ says most professionally prepared studies range from $3,000 to $12,000 depending on property size and complexity CPA firm partnership program; per-client terms not published. Revisions: not published; ask ETS
9 Madison SPECS Checked Nov 8, 2026 Investment property worth at least $1M, or a renovation of at least $750,000, held 3+ years Yes, an engineer visits the property Depends on the property's complexity (no fixed time published) No fee schedule. Its FAQ says a typical study is $4,000–$11,000, a fixed fee Not stated on the pages we read
10 Capstan Tax Strategies Checked Nov 8, 2026 New or acquired property with a depreciable basis over $1M, or renovations over $300,000 In-person site visit (a desk review option has none) 30 days from site visit to report Not published Not stated on the pages we read
Trademarks belong to their owners. "Who it fits" is each firm's own guidance where it publishes any, otherwise our editorial assessment; it is not an endorsement. The ranking order is our editorial judgment on the basis stated above it. Each linked firm has a side-by-side page, and the comparison hub has every matchup, including DIY software vs. a done-for-you study.
Start an engineering-based cost segregation study in about a minute. Studies from $495, audit support included.
Three questions that get you to the right firm.
Answer these in order.
How to choose a cost segregation provider for a rental property. Six steps, in order.
- 1Check that a study is worth it first.
A study pays off when the building (not the land) is a meaningful share of what you paid, you plan to hold the property for a few years, and you can use the extra depreciation. Run your own numbers in the free calculator before you talk to any firm.
- 2Decide whether you need someone on site.
For a single-family rental, condo, short-term rental or 2–4 unit building, the components that drive the study are documented in the closing file, listing photos and public records, so a remote study is the norm. An on-site visit earns its cost on large or unusual commercial buildings.
- 3Read a real sample report.
Ask every firm for a full sample, not a summary. Check that it lists components with costs and MACRS classes, explains the method, and includes a depreciation schedule your CPA can enter. Ours is on the sample report page.
- 4Compare what is included, not only the fee.
Form 3115 support for a look-back, audit support, free revisions and turnaround are where firms differ most. A low fee with paid revisions and no audit support can cost more than it looks.
- 5Prefer a published price.
A firm that publishes its fee schedule lets you know the cost before a sales call. Ours is on the pricing page: from $495 for a single-family rental, short-term rental or condo.
- 6Match the timing to your filing deadline.
Traditional firms often take several weeks after a site visit. If your return is due soon, ask for a written delivery date before you pay.
Tick each one off as you get an answer.
More on rentals: cost segregation for a rental property and cost segregation for short-term rentals.
Six things that matter more than the brand name.
Component-level cost basis and MACRS classes under Rev. Proc. 87-56, organized around the IRS Cost Segregation Audit Techniques Guide (Pub. 5653).
Ask who prepares the study, how it is checked before delivery, and whether you get a page written for your CPA explaining how each number was reached.
If the property was placed in service in an earlier year, the study should support Form 3115 so your CPA can catch up missed depreciation without amending old returns.
Find out who answers if the IRS asks about the study, whether that is included in the fee, and whether it runs through your CPA.
Ask what happens if your CPA needs a change: how many revisions are free, for how long, and whether there is a refund if the report cannot be used.
On-site engineering earns its fee on large, specialty commercial property. For residential rentals, short-term rentals and small commercial, a remote engineering-based study is faster and costs a fraction as much.
What each is good at, and where it isn't.
Every provider below has a real strength and a real limitation. We include ours. The other firms in the table are covered on their own side-by-side pages.
Cost Seg Smart
Speed and residential pricing. Most residential studies are delivered in 1–2 business days rather than several weeks, from $495 for a single-family rental, short-term rental or condo and from $995 for commercial, all on a published fee schedule. Each study is a CPA-ready PDF with a component schedule, MACRS classes, a Form 3115 §481(a) section when a look-back applies, and a table mapping the IRS Audit Techniques Guide's quality elements to the sections that address them. Questions from the IRS are answered through your CPA at no charge.
Cost seg only: if you also need R&D credits, §179D or §45L from the same project team, a full-service specialty tax firm covers more. On large specialty commercial property, add the in-person site visit when you order.
Madison SPECS
A deep specialty-engineering bench, particularly on industrial, manufacturing and hospitality work, where on-site judgment captures custom assets and process equipment that never appear in public records. Well known among commercial real estate professionals.
Built around engineer-led engagements, so on a smaller residential rental you pay for more engineering than the property usually needs. Its own guidance on property size and fees is in the table above.
Engineered Tax Services
A full-service specialty tax firm, so cost seg comes alongside R&D credits, §179D energy deductions and other work with coordinated working papers. If you need two or three of those on one commercial property, one project team is worth paying for.
If you only need cost seg, you are paying for engagement infrastructure you will not use, and its studies include an inspection, which takes time (see the table).
CSSI
Decades in the market and well known to CPA referral networks, which matters more than it sounds: many mid-market commercial CPAs already work with it. Commercial-leaning, with on-site engineering.
A traditional engagement model, so for a residential rental under $1M the price and turnaround look much like a large firm's: slower and more expensive than the property usually calls for.
DIY and automated software
The cheapest route to a component-level schedule, and for a practitioner who already knows Rev. Proc. 87-56 it removes work rather than adding it.
The category hides three delivery models behind one name: self-service tools, done-for-you automated studies and engineer-checked tiers. The price does not tell you whether anyone qualified checked the result or whether you are doing hours of classification work yourself. The full breakdown is on the software comparison page.
Does the IRS treat a low-priced study differently?
The Cost Segregation Audit Techniques Guide does not distinguish by price or by vendor. It evaluates a study against 13 quality elements: component identification, cost classification, documentation of the method, MACRS treatment and the rest. A study that addresses each element with documentation traceable to credible cost data, Pub. 946 and Rev. Proc. 87-56 holds up well. A study that doesn't, doesn't, whatever it cost.
The price difference mostly reflects the labor model: on-site engineering, hand-drafted reports and project management. What varies more than price is who checks the work and who answers the IRS if it asks. Traditional firms include examination response in the engagement or sell it as an add-on. Cost Seg Smart responds through your CPA at no charge. Self-service software generally leaves that to you.
How this comparison was made, and where it can go wrong.
We read each firm's own website (pricing, FAQ, process and service pages) and recorded only what the firm states about itself, with the page and the date. We did not use review sites, request quotes or contact any firm. Cost Seg Smart is one of the firms compared, and our own row comes from our published price list.
A published price is the floor a firm states for its smallest or simplest property, under the conditions printed with it. Your fee depends on your property. Confirm with any firm before you order, including us.
Firms change prices and terms. Every competitor fact here links to the page we read and shows the date we read it. If a page has changed since, the firm's current page wins.
Plenty of good engagements happen outside these ranges. Treat the ranking and the decision tree as a starting point, not a verdict.
Two firms can use the same cost data and MACRS framework and still deliver reports of different quality. A sample report and your CPA's opinion tell you more than firm size does.
When Cost Seg Smart is the right call, and when it isn't.
We're built for residential rentals, short-term rentals, multifamily and commercial property of any size, from a cost basis of $50,000: engineering-based studies, from $495, with most residential studies delivered in 1–2 business days, audit support and a CPA-Ready Guarantee, with in-person site visits available in all 50 states. For most investors and the CPAs who serve them, our engineering-based approach produces a report documented to the same IRS framework for a fraction of the cost and wait. If you also need R&D credits or energy incentives from one project team, a full-service specialty tax firm may suit you better. Own several properties? See our cost segregation services for real estate investors, including the portfolio discount.
Common questions.
What is the best cost segregation company?
It depends on the property. For residential rentals, short-term rentals and most commercial property, an engineering-based provider such as Cost Seg Smart (from $495, most residential studies delivered in 1–2 business days) gives the same MACRS classification under Rev. Proc. 87-56 for a fraction of the cost and wait. For large commercial with specialty systems, add an in-person site visit, or consider an engineer-led firm such as Madison SPECS, Engineered Tax Services or Capstan.
How do I find the best cost segregation study provider for a rental property?
First confirm a study is worth it for your property. Then compare providers on four things: a full sample report for a property like yours, a published total fee, what is included (Form 3115 support, audit support, free revisions), and a written delivery date. For a single-family rental, condo, short-term rental or 2–4 unit building, a remote engineering-based study is the norm; an on-site engineer mainly earns its cost on large commercial property.
How much does a cost segregation study cost?
It depends on the firm and the property, and many firms do not publish prices. Cost Seg Smart is from $495 for a single-family rental, short-term rental or condo and from $995 for commercial. The comparison table shows each firm's own published figure and its conditions, or says the firm does not publish one.
Do I need a cost segregation company near me?
No. The IRS does not require an on-site inspection, though its Audit Techniques Guide recommends one for quality studies. A remote provider can serve a property in any state, and a visit can be arranged without a local firm when it would change the result.
Are remote cost segregation studies accepted by the IRS?
Yes. The IRS evaluates a study's methodology and documentation, not whether someone visited the site. A remote study built on closing documents, photos, public records and construction cost data is held to the same Audit Techniques Guide standard as an on-site study.
What is the difference between a cost segregation company, firm and service?
None in practice: all three mean a provider that sorts a building's components into shorter MACRS recovery periods. The real difference is the delivery model. Engineer-led firms inspect the property and usually quote several thousand dollars for commercial work. Remote services use documents, public records and cost models to deliver the same classification faster and for less on residential and small commercial property.
Which cost segregation company is best for a short-term rental?
For a short-term rental, a remote engineering-based study is usually the best fit, because the furnishings and site improvements that drive an STR study are documented in the listing photos and closing file. Cost Seg Smart prices short-term rentals the same as other residential rentals, from $495, with most studies delivered in 1–2 business days. Whether the extra depreciation offsets your other income depends on the short-term rental rules, so confirm that with your CPA.