CSSI Services

CSSI is America's premier engineering-based tax consulting firm, having completed over 45,000 studies since 2003. We partner with property owners and tax professionals to maximize tax benefits and increase cash flow through specialized tax solutions. Our platform includes: Cost Segregation Studies: Engineering-based analysis that accelerates depreciation on commercial and residential investment properties, reducing federal taxes and improving cash flow. Research & Development Tax Credits: Help businesses claim dollar-for-dollar tax reductions for qualifying research activities across various industries. 179D Tax Deductions: Assist building owners and designers in claiming energy efficiency tax deductions up to $5.36/sq ft for qualifying commercial buildings. Green Zip Tape: Revolutionary drywall installation system that transforms non-load-bearing walls into movable, reusable partitions while qualifying for accelerated depreciation. CSSI stands behind every study with complimentary audit representation, ensuring accuracy and compliance with IRS guidelines.