Rental Property Sale Tax Checklist: 22 Steps Before You Close (2026)

Most investors spend more time choosing paint colors than planning the tax consequences of a rental sale. The four-layer federal tax stack — §1245 recapture, §1250 recapture, long-term capital gains, and NIIT — can take 30–40% of a typical sale. Nearly every item on this checklist represents a decision that either costs or saves tens of thousands of dollars. The checklist is organized by timing: what needs to happen 12 months out, what needs to happen 90 days out, and what happens in the windows after closing.

Phase 1: 12+ Months Before Listing

The strategic decisions happen here. Once you've signed a listing agreement, most options are gone.

☐ 1. Run the full tax stack before deciding to sell

Use the Depreciation Recapture Calculator to compute all four layers: §1245 cost seg recapture, §1250 building recapture, LTCG, and NIIT. Include your PAL carryforward from Form 8582 — §469(g) releases all suspended losses at full disposition. The number you're working to reduce is the total federal tax, not just the capital gain.

☐ 2. Decide: 1031 exchange, installment sale, or pay the tax?

Three viable exit paths for a property with meaningful appreciation:

• 1031 exchange — defers all four tax layers; requires replacement property at equal or greater value and debt; 45/180-day deadlines are strict. Model your deferral →
• Installment sale under IRC §453 — spreads LTCG and §1250 recapture across years; but §453(i) requires §1245 recapture from cost seg to be recognized in full in the sale year regardless. Works well when there's no better replacement market and seller financing makes economic sense. Installment sale guide →
• Pay the tax and diversify — sometimes the right answer. If PAL carryforwards are large, replacement market is weak, or you're approaching a step-up-at-death, paying may be cheaper than a forced 1031 into an inferior property.

☐ 3. Check your Real Estate Professional Status (REPS) situation

REPS under IRC §469(c)(7) does two things for a sale: (a) converts rental income from passive to non-passive for prior-year PAL purposes — potentially releasing more carryforwards, and (b) eliminates the 3.8% NIIT on the sale gain under Treas. Reg. §1.1411-4(g)(7) if you satisfy the 500-hour safe harbor. At a $500K gain, that's $19,000 in NIIT saved. If your hours are borderline, the window to qualify closes December 31. REPS Calculator →

☐ 4. Check your PAL carryforward balance

Pull your most recent Form 8582. Every dollar of suspended passive loss from prior years is released at full disposition and offsets gain dollar-for-dollar in the sale year (IRC §469(g)). A $100,000 carryforward at a blended 28% effective rate saves $28,000. This is cash — quantify it before you close.

☐ 5. Evaluate cost segregation timing

If you haven't done a cost segregation study and are planning to sell within 18 months, do the math first. Cost seg accelerates depreciation that then triggers §1245 recapture at ordinary income rates when you sell — up to 37%, vs. the 25% max on §1250 recapture. If you're not doing a 1031 and don't have REPS or passive income to absorb the bonus depreciation, cost seg before sale can actually increase your tax bill. Only worth it if you have an unlock path. Cost Segregation ROI Calculator →

☐ 6. Consider Qualified Opportunity Zone reinvestment (for non-1031 exits)

A QOZ fund under IRC §1400Z-2 can defer capital gain from any source reinvested within 180 days of sale — including rental property gains. OZ 2.0 (OBBBA) introduced a rolling 5-year deferral with 10–30% step-up on the deferred gain, plus permanent exclusion of appreciation after 10 years. Worth modeling if you have a large gain and the 1031 replacement market is unattractive. OZ 1.0 investors: Dec 31, 2026 is the mandatory gain recognition date — plan accordingly. QOZ Guide → | QOZ Calculator →

Phase 2: 3–6 Months Before Listing

☐ 7. Select a Qualified Intermediary (if doing a 1031)

A QI must be in place before you sign the purchase and sale agreement for the relinquished property. The QI holds your proceeds and completes the exchange — you cannot "touch" the money without disqualifying the exchange (constructive receipt). Under Treas. Reg. §1.1031(k)-1(k), disqualified persons include your attorney, accountant, real estate broker, and any related party within 2 years. There's no federal licensing requirement, so verify FEA membership, E&O insurance, and segregated (not commingled) fund accounts. QI selection guide →

☐ 8. Begin replacement property search (if doing a 1031)

The 45-day identification window is very short. Having replacement candidates already evaluated before closing removes the pressure. Consider DSTs (Delaware Statutory Trusts) as backup — they close on demand and qualify as like-kind replacement property under Rev. Rul. 2004-86. Understand that DST income is permanently passive (REPS hours don't count) and typical fee loads run 7–10% of equity invested. DST Guide →

☐ 9. Estimate quarterly tax payments needed if not doing a 1031

If you pay the tax and close in Q3 2026, you'll owe Q3 estimated taxes by September 15 and Q4 by January 15, 2027. Safe harbor for AGI above $150K: pay 110% of prior-year total tax in four installments. A large rental sale in Q3 can spike AGI well above your normal range — calculate the Q3 payment before it's due. Estimated Tax Calculator →

☐ 10. Review entity structure

Property held in an LLC taxed as a partnership? The "same taxpayer" rule in a 1031 requires that the entity selling is the entity buying. If you plan to restructure post-sale (e.g., move from partnership to S-corp), do it before or after the exchange — not during. Related-party rules under §1031(f) also apply if the replacement property is purchased from a related party (10%+ common ownership). Entity structure guide →

☐ 11. Pull your depreciation schedule

Your adjusted basis at sale equals: original cost + improvements − all depreciation taken (allowed or allowable, whether or not you claimed it). If your CPA hasn't maintained a depreciation schedule, reconstruct it now. The §1250 recapture amount equals total straight-line depreciation on the building since acquisition. If you did a cost seg study, identify the §1245 component separately — it recaptures at ordinary income rates, not the 25% max.

Phase 3: At Listing / Near Closing

☐ 12. Execute the QI agreement before escrow closes

The QI must be formally engaged — agreement signed, exchange funds wired to the QI — before closing documents are signed and proceeds distributed. Many exchanges fail because the seller didn't engage the QI until the day of closing or signed documents before the QI agreement was in place. Your title/escrow company needs the QI's wiring instructions in the closing instructions.

☐ 13. Analyze boot

Boot is any proceeds you receive — cash left over after the purchase or net mortgage relief (reducing debt in the exchange). Boot is taxable in the year of the exchange. Cash boot: you receive $50K cash at closing. Mortgage relief boot: your relinquished property had $300K debt and the replacement has $250K — the $50K reduction is boot. Calculate boot before closing to avoid surprises. Boot Calculator →

☐ 14. Document all closing costs for basis

Closing costs that aren't deducted elsewhere — attorney fees, title insurance, recording fees — add to your basis and reduce gain. Selling commissions reduce gain directly. Document everything on the HUD-1/closing disclosure before you close; reconstructing it later is harder. If doing a 1031, the replacement property's basis is the relinquished property's adjusted basis plus any boot paid minus any boot received.

Phase 4: The 45-Day Identification Window (1031 only)

☐ 15. Submit written identification by Day 45

The deadline is 45 days from the closing date of the relinquished property — not business days, calendar days (IRC §1031(a)(3)(A)). If Day 45 falls on a weekend or federal holiday, IRC §7503 shifts the deadline to the next business day. The identification must be in writing, signed, and received by your QI by midnight of Day 45. 1031 Deadline Calculator →

☐ 16. Apply the Three-Property Rule (or 200% Rule)

Identify up to 3 replacement properties regardless of value (Three-Property Rule). Alternatively, identify any number of properties whose combined FMV ≤ 200% of the relinquished property FMV (200% Rule). A third option — the 95% Rule — allows any number of properties if you close on 95% of the total identified FMV; rarely practical. Strategy: identify 2–3 concrete candidates you'd actually buy, not a wishlist of 10.

Phase 5: The 180-Day Closing Window (1031 only)

☐ 17. Close on replacement property by Day 180

The replacement property must close within 180 calendar days of the relinquished property closing — or by the due date of your tax return for the year of sale, whichever is earlier (IRC §1031(a)(3)(B)). Critical trap: if your sale closes in October 2026, your 180-day window ends in April 2027 — right at the April 15 return deadline. Filing an extension gives you until October to file, but does NOT extend the 180-day window. Talk to a tax advisor if the 180-day window straddles April 15.

☐ 18. Close on a property you actually identified

You can only close on a property that was on your written identification list. If you identified three properties and your first choice falls through after Day 45, you can substitute to another identified property — but cannot add new ones after the identification deadline. Having 3 solid candidates on the list is the standard practice for this reason.

Phase 6: After the Sale (Tax Filing)

☐ 19. File Form 4797 for §1231 gain

Rental property held more than 12 months is §1231 property. Form 4797 (Sales of Business Property) computes the §1231 gain, separates §1245 recapture (Part III), and flows the remainder to Part I as §1231 gain. Net §1231 gain is taxed at LTCG rates; net §1231 loss is ordinary. The §1231 five-year lookback rule (§1231(c)) recharacterizes net §1231 gain as ordinary income to the extent of unrecaptured net §1231 losses from the five prior years. Section 1231 guide →

☐ 20. File Form 8824 (1031 exchange only)

Form 8824 is filed with the tax return for the year the exchange begins — the year of the relinquished property sale, not the replacement property purchase. It reports the exchange, calculates any boot recognized, and establishes the replacement property's carryover basis. If you participated in a related-party exchange under §1031(f), you must also file Form 8824 in each of the two years following the exchange.

☐ 21. Set up the replacement property's depreciation schedule (1031 only)

In a 1031 exchange, the replacement property inherits the relinquished property's adjusted basis — not its purchase price. This means you start with a lower depreciable basis and may have multiple "pools" of depreciation at different recovery periods (old MACRS schedule carries over; any "excess basis" for boot paid starts a fresh 27.5/39-year schedule). Your CPA must set this up correctly from day one or you'll have the wrong depreciation deduction for the life of the property.

☐ 22. Track the PAL carryforward release and state conformity

If you had suspended passive losses released at disposition (§469(g)), confirm they were applied correctly against the gain on your return — this is a common CPA oversight. Also check whether your state conforms to the federal 1031 rules. California, for example, allows the federal deferral but requires a California-specific clawback form (FTB 3840) if the replacement property is out of state. Several other states have similar tracking requirements. PAL Guide →

When to hire a financial advisor vs. relying on your CPA

Your CPA handles the tax filing — Form 4797, Form 8824, Schedule E, the depreciation schedule on the replacement property. What CPAs typically don't do: pre-sale tax modeling, 1031 vs. sell comparison, DST due diligence, cost seg ROI analysis timed to your exit, or PAL carryforward strategy across years. A financial advisor who specializes in real estate investors does the prospective planning that determines what your CPA files. The optimal time to engage an FA is at Phase 1 — 12+ months before you list. Engaging them in Phase 6 means you're paying to document decisions you can no longer change. CPA vs. FA: who does what →

1. IRS Rev. Proc. 2025-32 — 2026 inflation-adjusted tax amounts including long-term capital gains brackets (0%: up to $98,900 MFJ; 15%: $98,901–$613,700 MFJ; 20%: above $613,700 MFJ). IRS Internal Revenue Bulletin 2024-45
2. IRC §1411 — Net Investment Income Tax; 3.8% on lesser of NII or MAGI excess above $200,000 single / $250,000 MFJ; thresholds not inflation-adjusted. 26 U.S.C. § 1411 (Cornell LII)
3. IRC §1031(a)(3) — 45-day identification and 180-day closing deadlines for like-kind exchanges. 26 U.S.C. § 1031 (Cornell LII)
4. IRC §469(g) — Release of suspended passive activity losses on full taxable disposition to an unrelated party. 26 U.S.C. § 469 (Cornell LII)
5. Treas. Reg. §1.1031(k)-1(g)(4) — Qualified Intermediary safe harbor; §1.1031(k)-1(k) — disqualified persons. 26 C.F.R. §1.1031(k)-1 (eCFR)

Tax values verified against 2026 rules as of September 2026. OBBBA (July 2025) permanently restored 100% bonus depreciation; Social Security Fairness Act (January 2025) repealed WEP/GPO.