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Partial Asset Disposition: The Renovation Tax Strategy

By Zawwad Ul Sami, Founder, WeCostSegPublished: 2026-05-14Last updated: 2026-05-14

Treas. Reg. 1.168(i)-8 allows a partial disposition election when a building component is replaced. The remaining basis of the old component is written off (taxable disposition triggering Section 1245 or 1250 recapture). The replacement component starts fresh on its own depreciation schedule. The election prevents depreciating the same basis twice.

The election mechanics

When a building component (roof, HVAC, parking lot resurfacing) is replaced, the taxpayer may elect under Treas. Reg. 1.168(i)-8 to dispose of the old component. The remaining basis of the old component is recognized as a disposition gain or loss.

The new component starts fresh on its own depreciation schedule. Without the election, both the old basis and the new basis would be depreciated separately, doubling the basis tracked on the property.

When to elect

Major component replacements: roof replacement, HVAC system replacement, parking lot resurfacing, building envelope improvements. The basis of the old component is typically substantial.

Cost-seg-amplified properties where the old component was reclassified into a 5-year or 15-year bucket. The partial disposition writes off that basis at ordinary rates (Section 1245 recapture) but eliminates the duplicate tracking.

Coordination with cost seg

Cost seg studies typically identify components likely to be replaced. When the replacement happens, the partial disposition election uses the engineer's prior allocation to determine the old component's basis.

WeCostSeg studies flag short-lived components (carpet, appliances, HVAC) so the partial disposition election can be made cleanly when those components are replaced. Coordinate the election with your CPA at the time of replacement.

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.
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About the author

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.