We started with the belief that cost segregation shouldn’t be complicated or out of reach, but instead a powerful, practical tool every investor can use to accelerate wealth.
At USTAGI (US Tax Advisors Group, Inc.), our mission has always been simple: help real estate investors keep more of what they earn.
Founded by Joseph Viery, our firm was built on the idea that quality matters. With a financial background and a passion for teaching, Joseph set out to deliver engineering-based, audit-ready studies while keeping the process clear and approachable.
USTAGI was incorporated in 2017, building on cost segregation experience that dates to 2007. Today the team has delivered more than 20,000 studies nationwide, on properties ranging from single-family rentals to large commercial portfolios.
Joseph Viery began conducting cost segregation analyses in 2007. Along the way he saw too many investors missing out on tax savings because of generic, cookie-cutter reports, and too many owners of smaller properties who assumed a study was out of reach.
In 2017 he incorporated US Tax Advisors Group, Inc. to fix both. USTAGI matches the depth of each study to the property, so a duplex owner gets a study priced for a duplex, and a shopping center gets a full engineering analysis with an on-site inspection.
The firm has grown from that idea into a nationwide practice, but the mission hasn’t changed: help real estate investors keep more of what they earn, and make sure they understand exactly how.
Owners of single-family rentals, small multifamily and short-term rentals who want the deductions their property already qualifies for, without paying for a study sized for a skyscraper.
Owners of apartments, retail, office, medical, hotel, industrial and mixed-use property, including recent purchases, new construction and buildings owned for years that qualify for a look-back study.
Accountants who want a dependable study partner for their clients, with a report they can use directly on the return. CPAs can refer clients or offer USTAGI studies under their own practice.
You work with people, not a portal. The same team that scopes your study explains it to you and your CPA.
Founder and CEO
Joseph founded USTAGI and has worked in cost segregation since 2007. He is a regular guest on real estate and tax podcasts and the author of “Cost Segregation Made Affordable” in Colorado RECON, known for turning depreciation rules into plain-English strategy.
Read Joseph’s full bioCost Segregation Account Manager
Carlos brings more than 20 years in real estate, with an economics background and hands-on experience in commercial and residential development. He works with commercial investors and is often the first person new clients speak with.
Read Carlos’s full bioSenior Cost Segregation Advisor
David guides investors through the study process from first conversation to finished report, drawing on years of running a client-focused practice before joining USTAGI.
Read David’s full bioEngineering-based methodologies and audit-ready documentation, delivered in about 30 days once we have your property information.
USTAGI uses three methodologies: a modeling approach for qualifying one to four unit residential property with a building basis under $1 million, a detailed engineering cost estimate, and a detailed engineering analysis built from actual cost records when they exist.
Each component of the building is identified and assigned its recovery period: 5, 7 or 15 years for personal property and land improvements, and 27.5 or 39 years for the structure. Larger properties are inspected on site and photographed.
Every study is delivered with the calculations, photos and supporting records behind each reclassification, organized so your CPA can file from it and so the work can be explained if it is ever questioned.
If the IRS asks questions, USTAGI helps respond to information requests and provides the files behind the study. Support comes from the team that prepared the report, and it isn’t billed as an add-on.
We won’t promise a savings figure before we have looked at your property, and we won’t tell you a study is audit-proof. No study can guarantee how the IRS will rule. What we can promise is a study built on a defensible method, documented well enough that you and your CPA understand every number in it.
Compare our study methodologiesAcross the 1,782 recent studies with complete figures on file, covering 47 states, USTAGI analyzed $1.23B of property and reclassified $307M into 5, 7 and 15-year recovery periods.
The table shows the typical share of depreciable basis reclassified by property type. Every property is different, which is why a free estimate starts with your numbers, not ours.
Read the Case Studies| Property type | Studies | Median reclassified | Median price |
|---|---|---|---|
| Commercial | 170 | 27.7% | $1.09M |
| Multifamily | 300 | 24.8% | $436K |
| Short-term rental | 140 | 28.3% | $539K |
| Single-family rental | 1,172 | 24.5% | $235K |
Teaching is part of the job. USTAGI’s team writes, speaks and joins real estate programs to explain cost segregation, accelerated depreciation and related tax strategy.
Recognized among leading cost segregation firms for California single-family rental owners in 2026, in the list “Top Cost Segregation Firms for Single-Family Rental Owners in California (2026).”
Joseph Viery is the bylined author of “Cost Segregation Made Affordable.”
Brian Kiczula of USTAGI presented “Cost Segregation Explained: What Every Real Estate Investor Needs to Know” on February 5, 2026.
Joseph Viery is a frequent guest on real estate investing, commercial real estate, tax strategy and wealth-building programs.
Studies on everything from single-family rentals and short-term rentals to apartments, hotels, retail and industrial property.
Engineering-based methodologies and audit-ready documentation, with audit support included at no extra cost.
We believe in empowering our clients. You’ll understand the process, the numbers, and the strategy behind your study.
From pre-acquisition planning to long-term portfolio strategy, we’re here to help you grow.
Professional and extremely helpful!
Worked with Carlos through this process. Highly recommend this company!
I used USTAGI for a cost seg in 2025, they were very efficient, detail oriented and saved me thousands on my taxes. I plan on using them again for another cost seg this year. Would highly recommend!
US Tax Advisors Group, Inc. (USTAGI), also known as The Cost Seg Pros, is a cost segregation firm that helps real estate investors, property owners and the CPAs who advise them accelerate depreciation. The firm was incorporated in 2017, its founder’s cost segregation experience dates to 2007, and it serves property owners in all 50 states.
USTAGI was founded by Joseph Viery, its Founder and CEO. Joseph has worked in cost segregation since 2007, is the bylined author of “Cost Segregation Made Affordable” in Colorado RECON, and has been a guest on more than ten real estate and tax podcasts.
USTAGI has delivered more than 20,000 studies, from single-family rentals to large commercial portfolios. Among the 1,782 recent studies with complete figures on file, spanning 47 states, $307 million of property was reclassified into 5, 7 and 15-year recovery periods.
Single-family and small multi-unit rentals, multifamily apartments, short-term rentals, retail and shopping centers, office and medical office, hotels, industrial, mixed-use and self storage. Residential properties of one to four units with a building basis under $1 million may qualify for a lower-cost modeling study.
Most studies are complete within 30 days of receiving the property information USTAGI needs. Larger or more complex properties that require an on-site inspection can take longer.
Yes. USTAGI includes audit support at no extra cost: access to the supporting files, photos and calculations behind the study, help responding to IRS information requests, and support from the team that prepared the report. A well-documented study strengthens your position, but no study can guarantee how the IRS will rule.
Yes. USTAGI works alongside your existing CPA and delivers a report they can use directly on your return, including Form 3115 for look-back studies on property placed in service in earlier years. CPAs can also refer clients or offer USTAGI studies to their own clients.
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