Common Cost Segregation Mistakes and How to Avoid Them
Mistake 1: Waiting Too Long to Order the Study
The single most common cost segregation mistake is procrastination. Every year you delay a study, you miss out on accelerated depreciation that could be reducing your tax bill. For new purchases, the optimal time is the same tax year the property is placed in service. For existing properties, the best time is now, because a look-back study can claim all the missed depreciation in one shot.
With bonus depreciation phasing down annually, the cost of waiting is increasing. Properties placed in service sooner capture a higher bonus depreciation rate, making the first-year deduction larger.
Mistake 2: Choosing the Wrong Provider
Not all cost segregation studies are created equal. Studies that rely on percentage-based estimates, lack component-level detail, or are not prepared by qualified engineers are more likely to be challenged by the IRS. The cheapest option is rarely the best value when the deductions at stake are tens of thousands of dollars.
Look for a provider that uses engineering-based methodology, produces detailed asset listings, and follows the IRS Cost Segregation Audit Techniques Guide. Stratum meets all of these standards and delivers studies that are designed for audit defense from day one.
Mistake 3: Not Coordinating with Your CPA
A cost segregation study is only as valuable as its implementation on your tax return. Some investors order a study but then hand it to a CPA who is unfamiliar with how to apply the results. The CPA may not file Form 3115 correctly for a look-back study, may miss the bonus depreciation calculations, or may not properly integrate the new depreciation schedules with the existing return.
The best approach is to involve your CPA early in the process. Let them know you are ordering a study so they can plan for the implementation. Stratum provides CPA-ready reports with clear instructions, and our team is available to answer technical questions from your tax preparer.
Mistake 4: Overlooking the Look-Back Opportunity
Many investors who have owned properties for years assume they missed the window for cost segregation. That is not the case. The look-back study allows you to claim all missed accelerated depreciation in a single year via Form 3115. There is no statute of limitations on when you can file, and no requirement to amend prior returns. If you have been depreciating a property under straight-line for five, ten, or even twenty years, a look-back study can recover all that missed value.
Mistake 5: Ignoring Cost Segregation on Smaller Properties
Some investors assume cost segregation is only for large commercial properties or million-dollar vacation rentals. In reality, any property with a depreciable basis above $150,000 is a strong candidate. Properties under $500,000 can and do generate meaningful ROI from cost segregation studies. The study cost scales with the property size, keeping the ROI favorable even for smaller investments.
Do not make assumptions about whether your property qualifies. Stratum offers a free estimate that will show you exactly what your property could yield. There is no cost or obligation to find out.