Expert Tax Savings Services
Cost Segregation
179D Tax Deduction
R&D Tax Credits
Over 50,000 Studies Completed Since 2003
The CSSI Difference
CSSI is America’s leading provider of engineering-based tax consulting solutions. We partner with property owners and businesses to maximize tax benefits through accurate, compliant studies. Our proven methodology has delivered tangible financial benefits to clients nationwide for over 20 years, transforming complex tax regulations into improved cash flow.
Proven Track Record
With over 50,000 completed studies since 2003, our team brings unmatched knowledge to every tax analysis we perform.
Tailored Tax Programs
We deliver tax savings strategies for real estate investors, investment firms, property owners, and businesses through IRS-approved strategies.
Nationwide Coverage
Our nationwide network of professionals provides local expertise with high quality results across all 50 states.
Collaborative Approach
We work seamlessly with your CPA or Tax Advisor to secure maximum savings while ensuring full IRS compliance.
Did You Know ?
A Cost Segregation Study Can Save Property Owners $30,000-$80,000 in Tax Savings per $1 Million in Building Value Within the First Five Years of Ownership.
Explore Tax Savings Insights and Case Studies
179D Tax Deduction, Cost Segregation, R&D Tax Credits
Understanding Bonus Depreciation: A Guide for Real Estate Investors
Learn more
179D Tax Deduction
Understanding ASHRAE Standards and Their Role in Section 179D Deductions
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Client Reviews
Olena M.
Property Owner
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.
5 
Daan D.
Property Owner
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.
5 
David D.
Property Owner
Great experience working with CSSI on my accounting services. Very professional service.
5 
Jamie W.
Property and Business Owner
Very happy with the study that CSSI was able to get done for me and would recommend them.
5 
John L.
Retail Property Owner
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.
5 
Michael C.
Property and Business Owner
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.
5 
