1031 Exchange vs Pay the Tax: NPV Comparison
On a cost-segregated property with $400K accumulated depreciation and $700K total gain, the pay-the-tax path costs roughly $225K in federal tax at sale (Section 1245 recapture ordinary plus unrecaptured 1250 at 25% plus LTCG plus NIIT). The 1031 exchange path defers all $225K into the replacement property's basis. The deferral benefit at a 5% discount over a 10-year holding period is roughly $87K of NPV.
The pay-the-tax path
Sale of a $1.2M property with $400K accumulated depreciation produces $700K of gain on an $800K adjusted basis. Of the $400K accumulated depreciation, $280K is on 5-year and 15-year reclassified property (Section 1245 recapture at ordinary rates) and $120K is on 27.5-year real property (unrecaptured Section 1250 at 25%).
Section 1245 recapture at 37% ordinary: $104K federal. Unrecaptured 1250 at 25%: $30K federal. Remaining LTCG of $300K at 20%: $60K federal. NIIT at 3.8% on the gain: about $27K federal. Total federal tax: roughly $221K, plus state. Pay the tax now and receive the after-tax proceeds.
The 1031 exchange path
A like-kind exchange under IRC Section 1031 defers all $221K of tax into the replacement property's basis. Basis carries over. The replacement property starts with an adjusted basis equal to the relinquished property's adjusted basis plus any additional cash invested.
Section 1031 was narrowed by TCJA in 2017 to apply only to real property. Personal property is no longer exchange-eligible. The mechanics under Treas. Reg. 1.168(i)-6 require tracking exchanged basis (carryover) and excess basis (new cash) separately for depreciation purposes.
10-year NPV comparison
Pay the tax now: $221K out of pocket in year of sale. Cost seg on the replacement property only on the excess basis (additional cash invested).
1031 exchange: $0 tax in year of sale. Cost seg on the replacement property on the excess basis. The deferred $221K continues to grow if the replacement property is held long enough, but it must eventually be recognized unless erased by a basis step-up at death under IRC Section 1014.
NPV of $221K deferred 10 years at a 5% discount rate is $135K, meaning the deferral is worth $87K in present value terms. The advantage compounds further if the replacement property is held into another 1031 exchange or held to death.
| Path | Year-of-sale tax | Year-10 NPV cost | Trade-off |
|---|---|---|---|
| Pay the tax | $221K | $221K | Clean exit, $221K reinvestable elsewhere |
| 1031 defer | $0 | $135K NPV (deferred) | Locked into real estate, basis carried |
| 1031 then step-up at death | $0 | $0 | Tax permanently erased under Section 1014 |
When pay-the-tax wins
Three scenarios. First, when the seller is exiting real estate entirely and wants to redeploy capital in a non-like-kind asset class. Second, when the seller is in an unusually low marginal-rate year (retirement transition, sabbatical, NOL carryforward year) where the recapture costs less. Third, when the replacement property forced by 1031 timing rules is materially worse than what the seller could buy free of those constraints.
1031 exchanges have strict timing rules: 45 days to identify the replacement property and 180 days to close. Forcing a bad replacement just to defer is rarely a good trade.
Frequently asked questions
- How does WeCostSeg coordinate with my CPA?
- Every engagement follows the three-touch CPA Coordination Protocol. We send a preliminary analysis to your CPA on intake, share the draft report five business days before final delivery, and coordinate Form 3115 filing timing when a Section 481(a) adjustment applies. Your CPA never pays a fee.
- Does this analysis assume 100% bonus depreciation under OBBBA?
- Yes for property acquired with a binding contract on or after January 20, 2025 under Public Law 119-21. Property under a binding contract on or before January 19, 2025 stays on the legacy phase-down: 40% bonus in 2025, 20% in 2026, 0% in 2027 and after.
- Is the five-year audit defense included?
- Yes. Every WeCostSeg engagement includes five years of written audit defense at no extra cost. The defense aligns 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 your property details via the free proposal form or WhatsApp. Our engineer returns a written estimate of your first-year deduction within four business hours during US Eastern hours. No payment, no contract.
- Does the 1031 exchange eliminate the deferred recapture entirely?
- No. The deferred recapture transfers to the replacement property's basis. When the replacement is eventually sold without another exchange, the accumulated depreciation across all exchanged properties is recaptured. Only an estate basis step-up under IRC Section 1014 erases the deferred amount permanently.
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.