Our Services

A Platform Designed to Unlock Savings

Cost Segregation

Accelerate depreciation on your commercial property to reduce federal income taxes and increase cash flow through our engineering-based Cost Segregation analysis.

179D Tax Deduction

Claim up to $5.81 per square foot in tax deductions for energy-efficient commercial buildings through lighting, HVAC, and building envelope improvements.

R&D Tax Credits

Receive dollar-for-dollar tax reductions for your qualifying research and development activities across manufacturing, technology, engineering, and other industries.

Over 50,000 Studies Completed Since 2003

Engineering-Based Expertise

50,000+ 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. 

Keagan McNeall

National Sales Associate

Missouri

Keagan is a driven Sales Associate with a background in account management, technical support, and customer advocacy. Known for identifying client needs and delivering tailored solutions, Keagan consistently drives sales growth while streamlining communication between teams to enhance efficiency. As a Licensed Notary Public in Missouri, Keagan is committed to accuracy and confidentiality in document verification.

Early achievements include earning the Newcomer Award and closing a sale within the first month, reflecting a strong work ethic and ability to quickly adapt. Passionate about helping clients maximize savings—especially on taxes—Keagan is dedicated to exceeding goals and delivering real results.

Outside of work, Keagan enjoys working on cars, skateboarding, and spending quality time with family. Whether it’s trips to the park or competitive Mario Party nights, Keagan values fun, connection, and making lasting memories.

Contact

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.


Resources

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
866-757-6484