RentalWriteOff provides residential cost segregation studies designed to help rental property owners identify eligible accelerated depreciation deductions. Its engineering-based, expert-reviewed service analyzes property information, photos, or appraisal materials to classify qualifying components into 5-, 7-, and 15-year asset categories, rather than depreciating them solely as part of a 27.5-year building. The company serves residential rental and short-term rental owners, including those with duplexes, fourplexes, and mobile home parks.

Each study costs a flat $899 per property and includes itemization, valuation and asset classifications, supporting schedules, audit-ready documentation, and audit support. Eligible look-back studies include Form 3115. RentalWriteOff says its methodology follows the IRS Cost Segregation Audit Techniques Guide and that reports receive expert review and a final quality check. Customers submit information through a guided online process; the finished study is typically delivered within two business days after complete intake. The company also offers a free savings estimate, pricing information, CPA reviews, educational resources, and free 15-minute consultations. Reports are organized for customers to share with their tax preparers.