How Does a §743(b) Step-Up Inside an Opportunity Zone Fund Create Cost Segregation Deductions?
When a Qualified Opportunity Fund partnership with a §754 election has an interest transferred, a positive §743(b) adjustment gives the transferee depreciable basis that a cost segregation study allocates to 5-, 7- and 15-year property, but only a transferee who holds a qualifying investment ten years, sells the QOF interest and makes the §1400Z-2(c) election excludes the recapture.
A Qualified Opportunity Fund is, in most structures, a partnership for tax purposes, so every rule that governs partnership-interest transfers governs QOF LP transfers too, including §754 and the §743(b) adjustment that fires when a partnership makes the election and a partner is bought out, inherited from, or otherwise steps out. A buyer who paid with cash that is not deferred eligible gain gets the adjustment but never the §1400Z-2(c) election, and in a two-tier fund the adjustment reaches the building only if the lower-tier QOZB also has a §754 election. The transferee's new basis rides the 5-, 7-, and 15-year buckets exactly the way it does in a non-OZ partnership. What is different is the ten-year exit, which turns the accelerated cost segregation deductions from a timing benefit into a permanent one.
We covered the general §754 / §743(b) partner-basis cost segregation mechanic in Section 754 and Cost Segregation: How a Partnership Buy-Out Creates New Depreciable Basis. This post is the QOF-specific companion: the mechanic is the same, the inputs are the same, but the exit math changes the answer to "was cost seg worth it?" in a way that non-OZ partnerships never see.
What Does a §754 Election Adjust When a QOF Interest Changes Hands?
Under IRC §754, a partnership may elect to adjust the inside basis of its assets when a partnership interest is transferred (§743(b)) or when a distribution is made (§734(b)). The election is generally irrevocable and, once made, applies to every subsequent transfer. Because a QOF is a partnership, the election that an LP-interest transfer turns on lives on the QOF's own Form 1065. In the common two-tier structure that is only half of it: where the QOF holds the real estate through a qualified opportunity zone business (QOZB) partnership, the §743(b) adjustment lands on the QOF's basis in its QOZB interest, and under Treas. Reg. §1.743-1(f) it reaches the building's depreciable basis only if the QOZB also has a §754 election in effect — so a two-tier fund needs the election at both tiers, not just at the fund. Sponsors who intend to accommodate secondary transfers of LP interests should get the §754 election onto the fund's return and the QOZB's return early; the sponsor is the one filing.
Under §743(b), if an election under §754 is in effect, the transferee partner takes an adjustment to the basis of partnership property equal to the excess of the transferee's outside basis over the transferee's share of the adjusted basis of partnership property. — Framework of IRC §743(b) and §754
What Triggers a §743(b) Adjustment Inside a QOF?
The trigger events are the same as in any partnership — a purchase of one LP's interest by another party, a §1014 inheritance after an LP's death, and certain other transfers. Note that on the seller's side, a pre-ten-year sale of a QOF interest is itself an inclusion event under §1400Z-2(b): the seller recognises their original deferred gain in that year. On the buyer's side the result splits, and which way it splits decides whether there is anything to cost-segregate at all. A buyer who pays with cash that is not deferred eligible gain holds a non-qualifying investment under §1400Z-2(e)(1) — no deferral election means no §1400Z-2(c) FMV election, ever, however long they hold — but takes an ordinary cost basis in the interest, so with a §754 election in place they do get a full §743(b) adjustment on their share of the fund's inside basis. A buyer who instead rolls their own eligible gain into the purchase and makes the deferral election acquires a qualifying investment with its own ten-year clock, but §1400Z-2(b)(2)(B)(i) sets their basis in that investment at zero, and a zero outside basis leaves no excess over their share of inside basis — so the §743(b) adjustment is zero as well. On a purchased interest the step-up and the ten-year exclusion do not arrive in the same hand.
The §743(b) adjustment is allocated under §755 and Treas. Reg. §1.755-1(b) across the fund's assets item by item, by the gain or loss the transferee would be allocated if the fund sold all of its property for cash at fair market value, with any difference between the capital-gain class's total gain and the adjustment allocated to that class spread across its items in proportion to fair market value (Treas. Reg. §1.755-1(b)(3)(ii)); there is no land-first ordering. Land takes the share its own built-in gain earns it and does nothing depreciable with it, and the cost segregation study of the underlying real estate identifies the 5-, 7-, 15-, 27.5- and 39-year items the rest is allocated among. The output is a §743(b) supplement to the study that the CPA drops into the K-1 attachment under §754. Whether the transferee can deduct that allocation in the year it arises is a separate basis question — the Opportunity Zone zero-basis problem walks through when an OZ investor's basis limits the deductions a cost segregation study produces.
How Cost Segregation on a §743(b) Step-Up Interacts With the Ten-Year Exit
Inside an OZ fund, the ten-year hold lets the LP who sells a qualifying QOF interest elect under §1400Z-2(c) to treat the basis of that interest as its fair market value on the date of sale. On that sale of the interest, the election excludes appreciation and — critically for anyone who took accelerated cost segregation deductions — depreciation recapture on the gain attributable to those deductions. Both layers of gain that normally arrive at exit are excluded to the extent the election applies. If the fund sells the property, a separate election under Treas. Reg. §1.1400Z2(c)-1(b)(2)(ii) can exclude the gain for partnership or S-corporation funds, and a corporate fund gets no such election.
For a transferee who got a §743(b) step-up on an interest that is a qualifying investment, and who used a cost segregation study to accelerate depreciation on the stepped-up basis, this changes the exit math. Outside a QOF, the accelerated deductions come back as §1245 ordinary recapture on the 5- and 7-year components, §1250 ordinary recapture of depreciation taken above straight-line on 15-year land improvements held more than one year, and unrecaptured §1250 gain on the shell. Inside a QOF, on a sale of the interest after a ten-year hold on a qualifying investment with the §1400Z-2(c) election actually made, all three are excluded to the extent the election applies. The accelerated depreciation the transferee claimed is then permanent, not deferred. That is why the §754 / §743(b) mechanic is worth more per dollar inside an OZ fund than it is anywhere else — the same cost seg study, applied to the same §743(b) adjustment, produces a bigger after-tax result because, on a sale of the interest after that ten-year hold with the IRC §1400Z-2(c) election made, recapture never arrives.
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Purchase vs Inheritance: The Bonus Depreciation Split, QOF Edition
The general purchase-vs-inheritance split for bonus depreciation applies inside a QOF exactly as it does outside. For a purchase-triggered §743(b) adjustment (one LP buys another out), Treas. Reg. §1.168(k)-2(b)(3)(iv)(D) treats the basis increase as a used-property acquisition, eligible for bonus depreciation, only when the buyer had no depreciable interest in that portion of the property before the transfer and the purchase meets the §179(d)(2) requirements that Treas. Reg. §1.168(k)-2(b)(3)(iii)(A)(2) incorporates, including that the interest is not bought from a related person (relatedness is tested between the transferor and the transferee of the interest, §1.168(k)-2(b)(3)(iv)(D)(2)). Under OBBBA, bonus is 100% when the written contract to buy the interest became binding after January 19, 2025 (IRS Notice 2026-11 confirmed the acquired-date test turns on the binding contract, not the closing date). When it became binding on or before that date, the TCJA phase-down applies by the year of the transfer: 80% in 2023, 60% in 2024, 40% in 2025, 20% in 2026, and 0% after that.
For an inheritance-triggered adjustment (§1014 step-up flowing through §743(b) after an LP's death), the basis increase does not qualify for bonus depreciation, because the heir’s basis in the interest is determined under §1014, and §179(d)(2)(C)(ii), which the used-property rules apply to a §743(b) adjustment, excludes a basis determined under §1014 (Treas. Reg. §1.168(k)-2(b)(3)(vii)(P), Example 16). Note also that under Treas. Reg. §1.1400Z2(b)-1(c)(4), a transfer of a QOF interest by reason of death is generally not an inclusion event — the heir tacks the decedent's holding period. So an inherited QOF interest often reaches the ten-year mark faster than a purchased one, meaning the exclusion-of-recapture benefit arrives sooner, but the transferee's own accelerated depreciation on any §743(b) step-up during the hold is not bonus-accelerated.
When Does the §754 Election Actually Matter for a QOF Sponsor?
Sponsors sometimes assume that because early LP transfers are rare — and the ten-year hold discourages them — the §754 election is not worth the operational overhead. Two situations flip that:
- Secondary-market LP transfers. Some QOFs run explicit secondary-market activity (family-office-to-family-office resales, GP-led continuation vehicles). Every purchase-triggered transfer with §754 in place produces a §743(b) step-up for a buyer who takes a cost basis in the interest, and a cost segregation study on the underlying property makes that step-up productive. Without the election, the buyer sees an outside-basis step-up that does nothing until they exit. Fund leverage is the other input a secondary buyer and their lender weigh alongside the step-up — see why debt basis changes depreciation capacity in an Opportunity Zone deal.
- Estate transfers of LP interests. Even without a secondary market, LPs die during a ten-year hold. Heirs get §1014 step-up on the outside basis; with §754 in place, they get a §743(b) adjustment on the inside basis too. That adjustment can be cost-segregated (though bonus depreciation is not available on it, under the §1014 rule above), and the accelerated depreciation runs during the remainder of the hold.
Both are situations the operating agreement can silently address by adopting the §754 election on the fund's initial 1065. Adding it later is harder: a late §754 election generally has an automatic 12-month extension from its due date under Treas. Reg. §301.9100-2(a)(2)(vi) if that section's conditions are met; after that, relief is by request under §301.9100-3, which the IRS decides case by case. The sponsor's CPA makes that filing.
Frequently Asked Questions
Does a QOF need a §754 election to get the cost segregation benefit on its underlying property?
No — the fund's own property-level cost segregation study runs regardless of whether §754 is elected. The §754 election matters specifically for LP-interest transfers: without it, a transferee's outside-basis step-up does not create new depreciable basis, and there is nothing extra for the cost segregation study to allocate on the transferee's side. The QOF's ordinary annual depreciation on the underlying property continues either way.
What happens to the accelerated depreciation from a §743(b) cost segregation study when the transferee sells their QOF interest after ten years?
Where the transferee's interest is a qualifying investment held ten years, the §1400Z-2(c) FMV basis election on a sale of the QOF interest excludes gain on that interest — including the portion attributable to accelerated depreciation. The §1245 ordinary recapture on the short-life 5- and 7-year property, the §1250 ordinary recapture on the 15-year land improvements, and the unrecaptured §1250 gain on the shell and land improvements are all excluded on that sale of the interest after the ten-year hold, to the extent the election applies. The accelerated cost segregation deductions the transferee claimed during the hold become permanent tax benefits, not deferred ones. If the fund sells the property, a separate election under Treas. Reg. §1.1400Z2(c)-1(b)(2)(ii) can exclude the gain for partnership or S-corporation funds, and a corporate fund gets no such election.
Can bonus depreciation apply to a §743(b) adjustment inside a QOF?
Yes for a purchase-triggered adjustment when the written contract to buy the interest became binding after January 19, 2025 (100% bonus under OBBBA per IRS Notice 2026-11), the buyer had no prior depreciable interest in that portion of the property, and the seller is not a related person; no for an inheritance-triggered adjustment, because the heir’s basis in the interest is determined under §1014, and §179(d)(2)(C)(ii), which the used-property rules apply to a §743(b) adjustment, excludes a basis determined under §1014 (Treas. Reg. §1.168(k)-2(b)(3)(vii)(P), Example 16). The QOF setting does not change the bonus depreciation rules — it changes what happens to the recapture at exit.
If the QOF's underlying property has already been cost-segregated at the fund level, do we run a fresh study for the §743(b) supplement?
Not a fresh property-level study, but not a re-application of its percentages either. The fund-level study supplies the inventory of 5-, 7-, 15-, 27.5- and 39-year items and their costs; Treas. Reg. §1.755-1 then allocates the transferee's §743(b) adjustment item by item by each item's built-in gain at fair market value on the transfer date (with any remainder in the capital-gain class spread in proportion to fair market value), so the supplement needs fair market values as of that date and the fund's adjusted basis in each item. Items the fund has already depreciated heavily, such as the 5- and 7-year property, can draw a larger share of the adjustment than their share of the original cost.
How does the ten-year clock work for the transferee?
It depends on how the purchase was funded. A buyer who pays with cash that is not deferred eligible gain holds a non-qualifying investment under §1400Z-2(e)(1), so no ten-year clock runs for them and the §1400Z-2(c) FMV election never becomes available, however long they hold. A buyer who rolls eligible gain into the purchase and makes the deferral election does start a fresh ten-year clock on that date, measured from the investment rather than from the fund's original placed-in-service date, but takes a zero basis in the investment under §1400Z-2(b)(2)(B)(i), which leaves no §743(b) adjustment to cost-segregate. An heir tacks the decedent's holding period because a transfer by reason of death is not an inclusion event under Treas. Reg. §1.1400Z2(b)-1(c)(4), so the ten-year mark can arrive sooner. This matters for the cost segregation study's economics: the accelerated deductions are worth more if the transferee can reach the FMV election within their hold, because that is what makes the depreciation permanent rather than deferred.
What if the sponsor never made the §754 election and now wants to accommodate a secondary transfer?
A late §754 election generally has an automatic 12-month extension from its due date under Treas. Reg. §301.9100-2(a)(2)(vi) if that section's conditions are met; after that, relief is by request under §301.9100-3, which the IRS decides case by case. The sponsor's CPA makes that filing. Until the election is in place the transferee's outside-basis step-up does nothing for depreciation. Sponsors who anticipate any secondary activity — including estate transfers — should make the election early rather than scrambling for a late one.
Getting Started
If you're a QOF sponsor considering (or accepting) an LP transfer, or an LP contemplating buying into an existing fund's secondary market, how long the §754 / §743(b) cost segregation engagement takes depends on whether the fund's underlying property has already been cost-segregated (an existing study supplies the item inventory for the §743(b) supplement) or needs a property-level study first, and the work starts once we receive complete documents.
Start on our Opportunity Zone cost segregation page for the OZ-specific framing, or the general partner-basis piece is at Section 754 and Cost Segregation: How a Partnership Buy-Out Creates New Depreciable Basis. When you're ready, start your cost segregation study — bring the §754 election status and the transfer date and we can be specific about the number.
