Our Services
A Platform Designed to Unlock Savings
Over 45,000 Studies Completed Since 2003

Engineering-Based Expertise
45,000+ studies since 2003, expertly navigating complex tax regulations.

Multiple Tax Solutions
Our expertise spans cost segregation, 179D energy efficiency deduction, R&D credits, and sustainable building technologies to maximize your tax savings.

National Coverage
Our nationwide network of professionals provides local expertise while delivering consistent, high-quality results across all 50 states.

Tax Professional Partnerships
We collaborate with CPAs and tax advisors to ensure timely, compliant, and maximum tax benefits for their clients.
CSSI is America's leading provider of engineering-based tax solutions. We partner with property owners and their tax professionals to maximize tax benefits and increase cash flow through accurate, compliant studies. Our proven methodology has never triggered an IRS audit, and our nationwide team of experts consistently delivers results that transform complex tax regulations into tangible financial benefits for our clients.


Dan Hayes
Dan brings extensive financial and real estate expertise to CSSI from his background with top Wall Street firms including Morgan Stanley, Merrill Lynch, and Northwestern Mutual. As a licensed Realtor and General Partner in commercial real estate, he helps clients optimize their investments through cost segregation studies, 179D, PAD, and R&D tax strategies. A United States Air Force veteran, Dan applies the Air Force values of integrity first, service before self, and excellence in all we do to his client relationships. He takes an advisor-first approach, working closely with property owners and their tax professionals to maximize cash flow and minimize tax burdens. When not serving clients, Dan enjoys time with his wife and three daughters, coaches youth sports, and serves as both a PSIA Ski Instructor and National Ski Patroller at a Vail resort near Minneapolis.
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Get a Free Tax Savings Analysis of Your Property
We’ll deliver a complete assessment of potential savings in as little as two business days.
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Learn more about what CSSI can do for you.
We're committed to helping you take full advantage of cost segregation, 179D, and GreenZip technology.
Learn More About What CSSI Can Do for You
We’re committed to helping you take full advantage of Cost Segregation, 179D, R&D Tax Credits, and Green Zip technology.
Learn More