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Client Focused Collaboration

Partnering with CSSI extends your firm’s capabilities, allowing you to offer specialized tax solutions that generate significant savings for your clients while maintaining full compliance and enhancing your professional relationship.

Expertise in Specialized Tax Incentives

Our engineering-based approach to cost segregation, R&D credits, and energy-efficient tax deductions provides technical expertise that complements your accounting knowledge.

Accurate and Compliant Analyses

We deliver detailed, methodically documented studies that adhere to IRS guidelines, ensuring your clients’ claims are both precise and defensible upon examination.

Enhanced Client Satisfaction

By offering specialized tax savings strategies, you become a more valuable advisor to your clients, strengthening retention and generating referrals for your practice.

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Who We Partner With

CPAs & Accounting Firms

Wealth Advisors

Tax Attorneys & Advisors

Real Estate Brokers & Agents

Complement Your Tax Services with Engineering Expertise

1
Preliminary Analysis

Assess Client Eligibility

Review your client list for property owners who could benefit from our specialized tax strategies or simply share basic property details for a free preliminary analysis.

2
Engineering Study

Detailed Engineering Analysis

Our engineers conduct an on-site inspection and review 150+ building components to identify all opportunities for accelerated depreciation, including flooring, lighting, electrical, plumbing, cabinetry, landscaping, and parking lots.

3
Implementation

Tax Savings Delivered

We provide detailed documentation for your tax preparation and planning, including audit defense support at no additional cost. You maintain complete control of the client relationship while offering valuable additional tax saving strategies.

Connect With Our Team

Interested in partnering with CSSI? Let us know your specialty, and one of our team members will be in touch within the next business day.

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Insights & Case Studies for You and Your Clients

What Documents Are Needed for a Cost Segregation Study?

Cost Segregation

What Documents Are Needed for a Cost Segregation Study?

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R&D Tax Credits

The Real Risk Isn’t the R&D Credit. It’s Not Understanding It.

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The Real Risk Isn’t the R&D Credit. It’s Not Understanding It.

179D Tax Deduction

179D Tax Deduction for Architects and Engineers: A Comprehensive Guide

Learn more
179D Tax Deduction for Architects and Engineers: A Comprehensive Guide

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Google Review
19 Aug 2026

Brian and the CSSI team were great. Had a tight time frame for a cost segregation study before the tax filing deadline and they delivered a clean report quickly at a very fair price.

Google Review
19 Aug 2026

Robert Read has been extremely professional and knowledgeable throughout the several years we have worked with him on our cost segregation needs. His expertise, attention to detail, and clear communication have consistently made the process seamless and efficient. Robert has been a trusted resource, and I would highly recommend him to any property owner or real estate investor considering a cost segregation study.

Google Review
19 Aug 2026

Robert Read at CSSI has assisted our CPA firm with multiple cost segregation studies and R&D tax credit projects. He has been extremely knowledgeable, resourceful, responsive, and easy to work with throughout the process. Every client we have referred to Robert has had a seamless experience, and we have always received great feedback. I would highly recommend Robert and the team at CSSI to anyone looking for assistance with cost segregation or R&D tax credits.

Google Review
19 Aug 2026

Dude….what an incredible service! Tim Looney was incredibly prompt, responsive, professional, and VERY good at his job! Will OBVIOUSLY use them again next time I build a commercial building!! Thanks Tim!

Google Review
19 Aug 2026

Dan & his team were phenomenal!They jumped on my request and we locked in on Dec 31. Their report was well detailed & they were happy to get on a call with my CPA to do the needful. Their customer service is top notch & I recommend you engage them immediately for your Cost Seg Studies.

Google Review
19 Aug 2026

I needed CSSI Services for cost segregation of my short-term rentals and found their free analysis really good. The company was introduced to me by Kamilla, who explained the benefits very well. CSSI Services gave me the most thorough work with the highest tax advantages compared to two other companies. I appreciate their timely responses to emails and the availability to call Kamila when needed. They matched the promised numbers on the quote, delivered on time, and helped maximize my tax benefits. I also like that they have engineers run the study. The company is easy to deal with, professional, and offers IRS support if needed, giving me peace of mind. I also appreciate that I can always speak to one person who knows my situation, rather than a bot or chat.

Google Review
19 Aug 2026
Google Review
19 Aug 2026

I've had a great experience working w/ Brian & CSSI. The team is knowledgeable, professional, and responsive, and they make the cost segregation process easy to understand. I appreciate their expertise and attention to detail and would highly recommend CSSI to property owners and real estate professionals looking for a quality cost segregation firm.

Google Review
19 Aug 2026

CSSI was very helpful & accommodating doing our cost segregation studies for us, & saved us a significant amount in taxes. Highly recommend CSSI for all your cost segregation needs.

Google Review
19 Aug 2026

As a CPA, I know the value that cost segregation can bring to a commercial building owner. In fact, it’s one of the many tax strategies I discuss with my clients. I’ve known Tom Brodie for several years now and I often refer my clients to him when they need a cost segregation study! Tom is professional, thorough, and has helped my clients collectively uncover millions of dollars in accelerated depreciation!

Google Review
19 Aug 2026

Robert Read has been extremely professional and knowledgeable throughout the several years we have worked with him on our cost segregation needs. His expertise, attention to detail, and clear communication have consistently made the process seamless and efficient. Robert has been a trusted resource, and I would highly recommend him to any property owner or real estate investor considering a cost segregation study.

Google Review
19 Aug 2026

Robert Read with CSSI – Cost Segregation Services, Inc. has been a great resource for our CPA firm and our clients. We have referred multiple clients to Robert for cost segregation studies, and he has consistently been knowledgeable, responsive, and easy to work with. He does an excellent job explaining the process and making sure everything is handled efficiently from start to finish. Most importantly, our clients have had nothing but positive experiences working with him. I would highly recommend Robert and CSSI to any property owner or CPA looking for assistance with cost segregation.

Google Review
19 Aug 2026

We worked with George and his team at CSSI for our cost segregation study after our first year of running our short term rental. George made the process very smooth and was easy to reach when we had additional questions. We would recommend him and his team!

Google Review
19 Aug 2026

This was a very easy process and definitely worth the cost. Thank you, Nathan Nadeau, for all of your assistance and making the process of Cost Segregation so easy for us and our CPA.

Google Review
19 Aug 2026

Had both of my properties done here by George and his team, I will only go here for my cost seg needs. They made it understandable and painless, and the savings were amazing! I cant wait for the next one haha

Google Review
19 Aug 2026
Google Review
19 Aug 2026

Outstanding experience working with Tim Looney at CSSI. Tim is knowledgeable, responsive, and incredibly great to work with. He consistently goes above and beyond to provide excellent service and support. If you're looking for someone you can trust to get your cost seg done right, I highly recommend Tim and the CSSI team.

Google Review
19 Aug 2026

I had just bought two vacation rental properties, and had heard about cost segregation, but didn’t know who to use, so I asked around and got Tom Brodie’s name. We talked on the phone, and I told him about the two new properties and Tom explained how the process worked. Then he asked me if I had any other commercial properties. I said yes, but since I had owned some of them for several years, I didn’t think we could study those properties. He then told me about the Change of Accounting form and the fact that it wasn’t too late to study ALL my commercial properties! The combined result from studying all 13 of my properties was amazing, much better than I could have hoped for! When I mentioned to Tom that I needed a new CPA to handle all my real estate investments, he gave me a great recommendation! I couldn’t be happier with the total results, both the study and the new CPA that was VERY familiar with cost segregation and handling real estate investments!

Google Review
19 Aug 2026

Working with Kamila was on our cost segregation went smoothly, it was our first SRT s she had the patience to guide and educate us along the process. Much appreciated!

Google Review
19 Aug 2026

George Taylor was great to work with. He is very knowledgeable, personable, and responsive. I had 2 Cost Segs done – one on a single family home rental and the other on an STR condo. They were crucial in helping me lower my taxes and I couldn't be happier. I've shared with other investors as well. I will be using them again in the future.

Google Review
19 Aug 2026

Loved working with George and the whole CSSI team. They're incredibly professional and absolutely helpful in navigating what can otherwise be an intimidating process. They made it so simple! I'd highly recommend them to all friends, family, and clients in our property management company (Settled In Stays)!

Google Review
19 Aug 2026

Kamila was great to work with. She communicated well and made the whole process easy. Results were better than expected as well!

Google Review
19 Aug 2026

CSSI has been fantastic to work with and the results of the study exceeded expectations! Thank you to Kamila Kowalska and the CSSI Team! I highly recommend their services to anyone needing this very important study

Google Review
19 Aug 2026

Keith was fantastic to work with – I needed a lot of hand holding throughout the process! It was overall a fantastic experience and a huge cost savings; highly recommend!

Google Review
19 Aug 2026

Keith with CSSI was great to work with. We received great services and results to match. Thank you.

Google Review
20 Aug 2026

I've had a great experience working w/ Brian & CSSI. The team is knowledgeable, professional, and responsive, and they make the cost segregation process easy to understand. I appreciate their expertise and attention to detail and would highly recommend CSSI to property owners and real estate professionals looking for a quality cost segregation firm.

Google Review
9 May 2023

I worked with CSSI through Aaron Stratman. Aaron was gold. I've already recommended him to other investors!

Google Review
22 Aug 2023

CSSI is a great company to work with and Angela Lipsey is very knowledgeable. Highly recommend them for all of your cost segregation services.

Google Review
14 Jul 2023

Pretty darn amazing team that pull through when you need them. By the way the 1 star review above was given by a former star player for that same company caught red-handed with less than ethical … canned. And started a competing company. So please consider the source. And if "you" take your bitter and retaliatory review down I may consider amending mine.

Google Review
11 Feb 2026

David and his team were a pleasure to work with. Very responsive and quick. Would highly recommend. We will be using their services again in the future

Google Review
15 Sep 2025

Incredible team. Chris and team have helped me save so much on taxes! they go above and beyond, communicate effectively with my tax professionals, and know what they are doing more than anyone I've come across in the field. I have used their services on multiple occasions and know a handful of people who also utilized them through my recommendation!I highly recommend giving them a dial and at the very least, speaking to them about what they can do to help you

Google Review
6 Jan 2026

I used the firm for a cost segregation study of a townhouse rental. The professionalism and finished report were great. I highly recommend using them. Dr. Dan Boyd is key to helping explain how things are done.

Google Review
14 Nov 2025

I recently utilized CSSI for a cost segregation study on my property in California, and I couldn't be more pleased with the experience, particularly thanks to Daniel. Daniel was exceptionally knowledgeable throughout the entire process. He clearly understood the intricacies of cost segregation and was able to explain complex tax concepts in a way that was easy to understand. This made me feel very confident in the work being done. Beyond his expertise, Daniel was incredibly responsive. He consistently provided timely updates and promptly answered all my questions, which made the entire process smooth and stress-free. Thanks to Daniel's expertise and efficiency, the cost segregation study was a great success, providing valuable insights for my property. I highly recommend Daniel and CSSI to anyone in California seeking a professional and effective cost segregation service.

Google Review
29 Oct 2025

CSSI and specifically Dan Boyd have had a major impact on my business. The Cost Segregation study we engaged with CSSI yielded significant savings to our company. Having limited accounting/tax experience I felt very confident with sharing my information with Dan. Dan was very thorough and always available for additional questions. Dan's follow thru and professionalism were greatly appreciated.The results of the study were more than acceptable. I would recommend Dan Boyd and CSSI to anyone searching for a competent, knowledgeable Cost Segregation company.

Google Review
23 Mar 2025

Working with Joshua Jacobs was an exceptional experience from start to finish. His deep knowledge made the process effortless. He was always available to answer questions. Thanks to his expertise, we were able to maximize our tax deductions. I truly appreciate his professionalism, responsiveness, and dedication to his clients. I highly recommend Joshua and CSSI to anyone looking for expert guidance and significant tax savings.

Google Review
30 Jul 2026
Google Review
24 Jul 2026

Tinesha has been handling all of my Cost Seg Studies and had been doing an amazing job. She is on the ball, responsive, and turns them around quick. I use them in multiple states and could not be happier.

Google Review
1 Aug 2026

I got the professional service and advice from Joshua Jacob! He is very helpful!

Google Review
22 Jul 2026

As a financial advisor, I appreciate working with professionals who combine technical expertise with outstanding client service, and Josh Jacobs and CSSI exceeded my expectations. The cost segregation study was thorough, well-documented, and completed on time. Communication throughout the engagement was excellent, and they made the entire process seamless. They clearly know their field and delivered tremendous value, and in fact, gave me information about a Grouping Election I was unaware of that helped even more than just the Cost Seg study would have on it's own. They worked well with my CPA, and I wouldn't hesitate to recommend them to anyone considering a cost segregation study.

Google Review
6 May 2025

Amazing service and super quick turnaround. We reached out to CSSI to perform a cost seg studies for our 3 multifamily properties. Received a call back within 10 minutes and initial estimate of high and low range of additional depreciation expenses within 48 hours. We also got a quote from other 3 local companies and not a single one came even close in terms of pricing, turnaround time or detailed outcome. One firm sent me 30 pages questionnaire and requested one million reports to even give me a quote and demanded a non-refundable deposit. We were able the schedule the inspection within days and my reports came in within 2 weeks just as promised. Thank you, Aaron, and CSSI Services.

Google Review
6 Mar 2025

Incredible experience working with our CSSI rep. He is very knowledgeable and communicative. He saved us a tremendous amount of money and I highly recommend him and his firm.  

Google Review
1 Mar 2025

Great experience working with CSSI on my accounting services. Very professional service. 

Google Review
3 Nov 2024

Very happy with the study that CSSI was able to get done for me and would recommend them. 

Google Review
13 Jun 2024

Recently used CSSI for two retail properties of mine. The cost seg studies turned out better than expected. I am a very happy client and will be using them on future studies.

Google Review
18 May 2024

Enjoyed working with CSSI. Their expertise in cost segregation really helped us. The team is incredibly knowledgeable, professional, and always willing to go the extra mile to ensure we understand every step of the process. From start to finish, the service was seamless and exceeded our expectations. 

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