Key Takeaways
- Five IRS focus areas: preparer qualifications, methodology, inspection, classification accuracy, and reasonableness.
- Form 4562 management requires multi-class tracking, correct conventions, and partial disposition elections.
- Engineering-based studies typically retain 90-100% of their benefit through audit.
- Audit defense costs ($5,000-$15,000) are a justified investment relative to the benefit protected ($50,000-$200,000+).
This recap consolidates the execution, documentation, and compliance requirements for depreciation and cost segregation covered in Track 3. Test your understanding with the review questions below.
Compliance and Documentation Summary
The IRS Cost Segregation ATG trains examiners on five focus areas: preparer qualifications, methodology, physical inspection, classification accuracy, and reasonableness. Audit-resilient documentation includes the complete study report, inspection photos, Form 3115 (if look-back), and revised Form 4562 schedules. Cost segregation studies should be stored permanently. In 1031 exchanges, the exchange basis continues on the old depreciation schedule while excess basis qualifies for a new cost segregation study.
Form and Schedule Management Summary
Form 4562 after cost segregation includes multiple asset classes with different recovery periods, methods, and conventions. A master depreciation schedule tracks all components and must be transferred completely between CPAs. Common errors: wrong recovery periods, incorrect methods, missed conventions, and double-counted improvements. The partial disposition election must be filed when replacing building components.
Audit Defense Summary
Well-documented engineering-based studies survive audits with minimal adjustment (typically 0-10% of the benefit is reclassified). Engage a tax attorney for studies with $50,000+ tax impact. The engineering firm should participate in audit defense. The Office of Appeals often provides more favorable outcomes than the initial examiner. Total audit defense costs ($5,000-$15,000) are typically 3-8% of the retained benefit.
Compliance Matrix
Sources
- IRS Publication 946 — How to Depreciate Property(2024-12-15)
- IRS Cost Segregation Audit Techniques Guide(2024-12-15)
- IRS Form 4562 — Depreciation and Amortization(2024-12-15)
Common Mistakes to Avoid
Treating cost segregation as purely a CPA function without engineering involvement
Consequence: Studies without engineering analysis and physical inspections are the most vulnerable to IRS challenge and reclassification
Correction: Always engage a firm with licensed Professional Engineers—the engineering analysis is the foundation of audit defense
Failing to file the partial disposition election when replacing building components
Consequence: Both old and new components are depreciated simultaneously, inflating deductions and creating audit liability
Correction: File the partial disposition election with every component replacement—write off the old component and start a new schedule for the replacement
Not maintaining a master depreciation schedule separate from the CPA's tax software
Consequence: If the CPA relationship changes, the depreciation history may be incomplete or inaccessible, resulting in lost deductions or incorrect calculations
Correction: Maintain an independent master depreciation schedule (spreadsheet) updated annually and verified against Form 4562
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Test Your Knowledge
1.Which of the following is NOT one of the IRS's five focus areas when auditing a cost segregation study?
2.After a 1031 exchange, which portion of the replacement property basis qualifies for a new cost segregation study?
3.An IRS examiner proposes reclassifying all 5-year and 7-year components from a cost segregation study back to 27.5-year property. What is the recommended first response?