The Real Cost of NOT Doing a Cost Segregation Study

If you own a rental property, commercial building, or short-term rental worth more than $500,000, and you have not had a cost segregation study performed, you are voluntarily overpaying your federal income taxes. Not by a small amount -- by tens of thousands of dollars per year, compounding every year you wait.

This is not an opinion. It is arithmetic, grounded in IRC Section 168 and the Modified Accelerated Cost Recovery System (MACRS) that the IRS itself established.

What Cost Segregation Actually Does

When you purchase a residential rental property, the IRS requires you to depreciate the building over 27.5 years (39 years for commercial property). But not every component of that building has a 27.5-year useful life. The carpet, appliances, cabinetry, decorative lighting, landscaping, parking lot, and dozens of other components have much shorter useful lives.

A cost segregation study, performed by a qualified engineer, identifies and reclassifies these components into their proper MACRS categories:

• 5-year property: Carpeting, appliances, decorative fixtures, certain electrical components
• 7-year property: Office furniture, specialized equipment, certain fixtures
• 15-year property: Landscaping, parking lots, sidewalks, fencing, site improvements
• Land improvements: Drainage, grading, utilities to the property line

With bonus depreciation provisions under IRC Section 168(k), qualifying components in the 5, 7, and 15-year categories can be depreciated at accelerated rates in the first year. For properties placed in service with available bonus depreciation, this can mean deducting 60-100% of those components immediately rather than spreading them over 27.5 or 39 years.

The Math: What Waiting Costs You

Consider a real estate investor who purchases a $2 million multifamily property. Without cost segregation, the annual straight-line depreciation deduction is approximately $65,455 per year ($1.8M depreciable basis / 27.5 years, excluding land).

With a cost segregation study, a typical residential property will have 20-30% of its depreciable basis reclassified to shorter-lived asset categories. On a $1.8M depreciable basis, that is $360,000 to $540,000 in accelerated components.

At current bonus depreciation rates, much of that accelerated basis can be deducted in Year 1. At a combined federal and state tax rate of 37-40%, the first-year tax savings range from $133,200 to $216,000.

Compare that to the cost of the study itself, which typically ranges from $5,000 to $15,000 depending on property complexity. The ROI is often 15:1 to 40:1. In Year 1 alone.

Every year you delay, you forfeit that accelerated deduction and continue depreciating the entire building on the slow 27.5-year schedule. If you wait three years, you have potentially left $400,000 or more in deductions on the table -- deductions you could have been using to offset your W-2 income, business profits, or capital gains.

But I Can Still Do It Later, Right?

Yes -- and that is actually one of the most powerful aspects of cost segregation. Even if you acquired a property years ago and never performed a study, you can file IRS Form 3115 (Application for Change in Accounting Method) under the automatic change provisions of Revenue Procedure 2015-13 and take all the missed accelerated depreciation as a cumulative catch-up adjustment in a single tax year.

This is not an amended return. It is a prospective change in accounting method that the IRS has specifically authorized. You do not need IRS approval -- it is an automatic consent procedure.

However, there is a critical nuance: bonus depreciation rates are declining. For properties placed in service after December 31, 2022, bonus depreciation has been phasing down. Properties placed in service in 2025 qualify for 40% bonus depreciation, and the rate continues to decline in subsequent years unless Congress acts to extend or restore 100% bonus depreciation.

This means the longer you wait, the less bonus depreciation you can claim on the reclassified components. The window is literally shrinking.

The Objection That Does Not Survive Analysis

Some property owners tell us: "The study costs $8,000-$10,000. That is expensive." We understand the hesitation. But let us put it in perspective.

If the study identifies $400,000 in accelerated components and produces $160,000 in Year 1 tax savings, the study paid for itself 16 times over. If you wait one more year, you lose one year of accelerated deductions and potentially lose access to a higher bonus depreciation rate.

At AE Tax Advisors, we perform a preliminary analysis before you commit to the full engineering study. If the numbers do not make sense -- if the property basis is too low or the tax situation does not support the deductions -- we tell you. We do not sell studies that will not produce meaningful savings.

Who Should Get a Cost Segregation Study

Cost segregation delivers the highest ROI for investors who meet these criteria:

• Property basis (excluding land) exceeds $500,000
• Property was acquired, constructed, or renovated within the last several years
• You have sufficient income to absorb the accelerated deductions (W-2 income, business income, or other passive income)
• You qualify as a real estate professional under IRC Section 469(c)(7), or you materially participate in short-term rental activities
• You plan to hold the property for at least 5 years

If you check even two or three of those boxes, a cost segregation study is almost certainly worth pursuing.

What AE Tax Advisors Provides

We do not just order a cost segregation study and hand you a report. Our team, led by Christina Nortman, integrates cost segregation into a comprehensive tax strategy that considers your entire financial picture. We coordinate with qualified engineers, review the completed study for accuracy and IRS compliance, implement the deductions on your return, and file Form 3115 when needed to capture prior-year missed depreciation.

The result: our clients typically see $50,000 to $250,000 in tax savings from cost segregation alone, depending on property value and tax situation.

Stop Waiting. Start Saving.

Every tax year that passes without a cost segregation study is money you are choosing to give to the IRS instead of keeping in your own pocket. The law allows these deductions. The IRS has established the procedures. The only thing standing between you and significant tax savings is a phone call.

Contact AE Tax Advisors at (631) 614-5762 or team@aetaxadvisors.com to schedule your complimentary cost segregation preliminary analysis. We will tell you within one conversation whether a study makes sense for your properties.