When NOT to Do Cost Segregation: Five Scenarios
Skip cost segregation when (1) depreciable basis is under $300K and there is no STR or REPS path, (2) you cannot use the loss this year and have no exit plan, (3) you plan to sell within 2 years and recapture would erase the time-value advantage, (4) the binding contract was pre-January-20-2025 placing the property in 2027 or later with 0% bonus, or (5) the property is already sold (look-back via Form 3115 requires current ownership).
Scenario 1: Low basis with no loss usability
Property under $300K basis, no STR loophole, no REPS, no other passive income to absorb. The cost seg deduction suspends as a passive activity loss. Time value of the deferred deduction may not justify the engineering fee.
Wait until acquisition of a second property pushes total basis above $300K or until you qualify for STR or REPS. Then engage cost seg on the portfolio.
Scenario 2: Suspended losses with no exit plan
If the loss will suspend AND you have no exit plan within a reasonable horizon (1031, full disposition under Section 469(g), step-up at death under Section 1014), the time value of the deferred deduction shrinks toward zero.
An honest NPV requires an estimated exit year. Discount at a reasonable rate. If NPV is negative net of the engineering fee, skip.
Scenario 3: Planned quick sale within 2 years
Section 1245 recapture on a quick sale erases much of the time-value advantage. For a sale within 24 months of acquisition, the cost seg amplification produces minimal net benefit after recapture.
Exception: 1031 exchange into a replacement property that you will hold long-term. Then cost seg amplification on the relinquished property is preserved via basis carryover.
Scenario 4: Pre-cliff binding contract with late placed-in-service
Property under a binding contract on or before January 19, 2025 stays on the legacy phase-down. Placed in service in 2027 or later: 0% bonus depreciation. Cost seg still produces accelerated MACRS but without the bonus multiplier.
The math is much weaker without bonus. Engineered study fees may not pencil for properties placed in service after the phase-down ends.
Scenario 5: Property already sold
Form 3115 with DCN 7 requires the taxpayer to still own the property at the time of the Form 3115 filing. Properties already sold cannot use look-back cost seg.
The corrective opportunity for an already-sold property is to amend the return for the year of sale (subject to statute of limitations) and report the recapture and gain correctly. Cost seg is not available retroactively for a closed sale.
Frequently asked questions
- How does WeCostSeg coordinate with my CPA?
- Every engagement follows the three-touch CPA Coordination Protocol. Preliminary analysis CC'd to your CPA on intake, draft report shared five business days before final delivery, and Form 3115 filing coordinated when a Section 481(a) adjustment applies.
- Does OBBBA's 100% bonus apply to my acquisition?
- 100% applies to property under a binding contract on or after January 20, 2025 per Public Law 119-21. Property under a binding contract on or before January 19, 2025 stays on the legacy phase-down: 40% in 2025, 20% in 2026, 0% in 2027 and after.
- Is audit defense included?
- Yes. Every WeCostSeg engagement includes five years of written audit defense at no extra charge, aligned to the 13 Principal Elements of a Quality Cost Segregation Study under IRS Publication 5653 Chapter 4.
- Can I get a free preliminary analysis?
- Yes. Submit property details via the free proposal form or WhatsApp. Engineer-reviewed estimate returned within four business hours during US Eastern hours.
Zawwad Ul Sami, Founder
Zawwad Ul Sami is the founder of WeCostSeg, a founder-led cost segregation firm serving real estate investors across the US. He focuses on strategy, pricing, and the firm's overall direction.