Seller Financing in Commercial Real Estate: Carryback Structures, Installment Sale Tax Treatment, and Pro Forma Modeling

Key Takeaways

What Seller Financing Actually Is

Seller financing is a loan from the seller to the buyer as part of the purchase transaction. Instead of receiving 100% of the purchase price at closing, the seller receives a portion in cash (funded by the buyer's equity and senior debt) and carries the balance as a note. The note is a promissory note with a stated principal amount, interest rate, payment schedule, maturity date, and security interest.

In commercial real estate, seller financing most commonly takes the form of a purchase money second mortgage (a junior lien on the property, subordinate to the senior mortgage) or a seller carryback note secured by a pledge of entity interests (similar to mezzanine debt, where the collateral is the buyer's ownership interest in the property-owning entity). The choice between these two forms depends on the senior lender's requirements.

Seller financing has been used in commercial real estate for decades, particularly in tight credit markets. It differs from institutional mezzanine debt and preferred equity in three ways: terms are bilaterally negotiated between buyer and seller, pricing reflects the seller's tax and liquidity motivations, and the buyer-seller relationship from the purchase negotiation persists into the lending relationship.

When Seller Financing Gets Used

Most institutional CRE transactions close with conventional equity and debt, and the seller receives 100% of the purchase price at closing. Seller financing emerges in specific situations:

• Wide bid-ask spread. The seller wants $12M. The buyer can only justify $10.5M based on current NOI and cap rate. Seller financing bridges the gap: the buyer pays $12M with a $1.5M seller note at below-market terms, and the effective purchase price (on a present-value basis) is closer to the buyer's valuation.

• Conventional subordinate capital is expensive or unavailable. In tight credit markets (2023 was a recent example), mezzanine lenders retreat and pricing spikes. A seller who is willing to carry a note at 7% to 8% provides cheaper subordinate capital than a debt fund demanding 14% to 16%. The buyer gets a better blended cost of capital. The Federal Reserve Senior Loan Officer Opinion Survey is the standard quarterly gauge for tracking these credit-tightening cycles.

• Tax deferral. The seller has significant embedded capital gain and wants to defer tax recognition under IRC Section 453 (installment sale treatment). By receiving payments over 5 to 10 years rather than all at closing, the seller spreads the tax liability over the payment period. Tax deferral is the primary motivation in most seller-financed deals.

• Property challenges. Properties with significant deferred maintenance, environmental issues, zoning complications, or high vacancy may not qualify for conventional subordinate capital. A seller who knows the property and its issues may be willing to carry a note when an institutional mezz lender would not.

• Relationship transactions. Transactions between related parties, joint venture partners, or long-standing business relationships often use seller financing to simplify the capital stack and align incentives. The seller's willingness to carry a note signals confidence in the property and the buyer.

How the Note Is Structured

Every term in a seller carryback note is negotiable. There are no standardized forms (unlike CMBS intercreditor agreements or agency loan documents). The key terms:

The interest rate on the note is not entirely free-floating. The IRS requires seller notes to bear interest at least equal to the Applicable Federal Rate (AFR) for the term category matching the note's duration. Notes shorter than three years use the short-term AFR. Notes between three and nine years use the mid-term AFR. Notes longer than nine years use the long-term AFR. If the stated rate is below the applicable AFR, the IRS imputes interest at the AFR under Section 1274, converting a portion of what the parties characterized as principal into ordinary interest income for the seller and an ordinary deduction for the buyer. In 2026 the mid-term AFR has hovered in the 4.1% to 4.5% range, so most negotiated seller-note rates (6% to 10%) sit comfortably above the floor. When the parties want to accelerate the seller's tax deferral by pushing more of the payment into principal, they occasionally test the AFR floor, but the risk of recharacterization typically deters that.

Seller Carryback in the Capital Stack

A seller carryback note occupies the same position as mezzanine debt in the capital stack: between senior mortgage debt and common equity. The note is subordinate to the senior mortgage (either as a junior lien or as an unsecured obligation, depending on the senior lender's requirements).

The difference from institutional mezzanine debt is the relationship between the parties. A mezz lender is a third-party capital provider with no prior relationship to the property. A seller-lender is the former owner. That creates alignment (the seller knows the property) and potential conflict (the seller may have incentives that diverge from the buyer's).

Senior lender requirements for seller notes are generally similar to mezzanine debt requirements: the note must be subordinate, the seller must execute a subordination agreement or standstill, and the seller's remedies (foreclosure, acceleration) must be restricted during the senior loan term. Some senior lenders require that the seller note be fully unsecured (no junior lien) to avoid any complications with the senior lender's first-lien position.

Installment Sale Tax Treatment (IRC 453)

The installment sale method under IRC Section 453 allows a seller who receives at least one payment after the tax year of the sale to recognize gain proportionally as payments are received, rather than recognizing the entire gain in the year of sale. This is the primary tax benefit of seller financing for the seller. The statute is codified at 26 U.S.C. Section 453; the IRS's plain-English summary is Publication 537.

The mechanics:

1. Gross profit ratio. The seller calculates the gross profit ratio: (selling price minus adjusted basis) divided by selling price. If the property was purchased for $6M 15 years ago and sells for $12M, the gross profit ratio is ($12M - $6M) / $12M = 50%.
2. Gain recognition on each payment. Each payment received (principal, not interest) is treated as part sale proceeds and part return of basis. The taxable gain on each payment equals the payment amount multiplied by the gross profit ratio. On the $12M sale with a 50% gross profit ratio, $1M of principal received triggers $500K of taxable gain.
3. Interest is taxed separately. Interest received on the seller note is taxed as ordinary income in the year received. The interest component does not benefit from installment treatment.
4. Depreciation recapture. Under IRC Section 1250, depreciation recapture is recognized in full in the year of sale, regardless of the installment method. The installment method defers only the capital gain portion. On properties with significant accumulated depreciation, the recapture can create a material Year 1 tax liability even with a seller carryback.

Depreciation Recapture Deep Dive

Depreciation recapture is the single most misunderstood mechanic in seller-financed CRE transactions. Sellers see the installment method described as "deferring gain," assume the deferral applies to all gain, and get an unpleasant surprise when the accountant delivers a large Year 1 recapture bill on a deal where they only received a fraction of the purchase price in cash.

The rule is set out in IRC Section 453(i): any recapture income (depreciation recapture) attributable to the sale is recognized in the year of sale, not on the installment method. For real property, the relevant recapture bucket is unrecaptured Section 1250 gain. Unlike Section 1245 recapture on personal property (which is fully ordinary), Section 1250 recapture on real property is taxed at a maximum rate of 25% federal, plus applicable state tax and (for high earners) the 3.8% Net Investment Income Tax under IRC 1411.

The mechanical steps a seller and their accountant work through:

1. Compute total accumulated depreciation. Pull the depreciation schedule from every prior return. For a property held 15 years and depreciated straight-line over 39 years, roughly 38% of the original depreciable basis has been recovered as deductions.
2. Segregate 1250 recapture from remaining capital gain. The full amount of accumulated depreciation is unrecaptured 1250 gain, up to the total realized gain. Any remaining gain above that is standard long-term capital gain.
3. Apply the recapture rate at closing. The 1250 recapture is taxed at 25% federal in the year of sale, regardless of how little cash the seller received. Even if the seller received 0% cash and 100% seller note, the full 1250 tax is due at closing.
4. Apply the installment method to the residual capital gain only. The remaining long-term capital gain (post-recapture) is what gets spread over the collection period using the gross profit ratio.
5. Handle cost-segregation carve-outs separately. If the seller previously performed a cost segregation study and reclassified components as 5-, 7-, or 15-year property under Section 1245, those components carry full ordinary-income recapture at the seller's marginal rate. This is a common trap in properties acquired post-2010, when cost-seg became standard on institutional deals.

Liquidity planning matters. A seller carrying a large note on a heavily depreciated property can face a six- or seven-figure tax bill in Year 1 with only partial cash to fund it. Size the cash-at-close portion to cover recapture tax plus closing costs plus reserves. Sellers get this wrong on smaller carrybacks: they carry 40% of the price, receive 60% cash, and discover after the fact that their combined recapture and Year 1 installment tax exceeds the 60% cash. Model the recapture bill first, then size the note.

The Seller's After-Tax Return

The seller's motivation for carrying a note is often primarily tax-driven. The economic analysis compares two scenarios: (a) selling for $12M all-cash and paying the full tax liability in Year 1, or (b) selling for $12M with a $2.4M note and deferring a portion of the gain.

In Scenario A (all-cash sale), the seller receives $12M less closing costs and pays the full tax on the $6M gain in Year 1. At a combined federal + state rate of approximately 28% on the capital gain (including NIIT and state taxes), the tax bill is approximately $1.68M, plus $625K of depreciation recapture tax. Total after-tax proceeds: approximately $9.7M.

In Scenario B (with seller note), the seller receives $9.6M cash at closing plus a $2.4M note at 7.5% over 7 years. The Year 1 tax liability is reduced because only 80% of the gain is recognized at closing. The deferred gain ($1.2M) is recognized over Years 2 through 7 as principal payments are received. The seller also earns $180K annually in interest income (taxed as ordinary income).

The after-tax benefit of the seller note depends on the seller's tax rate, the interest rate on the note, and the seller's alternative investment returns. If the seller can earn more than 7.5% after tax by investing the proceeds, the note is suboptimal. If the tax deferral benefit exceeds the opportunity cost, the note is accretive. For sellers with large embedded gains and high marginal tax rates (federal + state exceeding 30%), the tax deferral is typically worth 100 to 200 bps of effective return on the note.

All-Cash vs Installment: After-Tax Numbers

Abstract statements about tax deferral do not settle a negotiation. Sellers make the choice with a side-by-side after-tax IRR comparison. This section works both scenarios on the $12M sale with $2.5M of accumulated depreciation and $6M of embedded gain, holding the seller's alternative investment yield constant so the comparison is like-for-like.

Assumptions used throughout: federal long-term capital gain rate 20%, NIIT 3.8%, state capital gain rate 5% (California mid-tier taxpayer would run higher, no-tax states would run lower), Section 1250 recapture rate 25% federal + 5% state. Seller's after-tax reinvestment yield on liquid proceeds: 5.0% (roughly the post-tax equivalent of a taxable investment-grade bond ladder in mid-2026). Seller note terms: $2.4M at 7.5% interest-only for seven years with balloon at maturity. Buyer creditworthy, note performs.

Scenario A. All-cash sale.

The seller receives $12.0M gross at closing. Selling costs of 2% ($240K) leave $11.76M net cash. In Year 1 the seller recognizes the full $6M gain: $2.5M as unrecaptured Section 1250 gain taxed at a blended 30% (25% federal + 5% state) for $750K, and $3.5M as long-term capital gain taxed at a blended 28.8% (20% + 3.8% NIIT + 5% state) for $1.008M. Total Year 1 tax: $1.758M. Net after-tax proceeds at end of Year 1: $10.00M.

The seller invests those proceeds at 5.0% after-tax equivalent for seven years. Ending wealth: $10.00M x (1.05)^7 = $14.07M. That is the benchmark.

Scenario B. $2.4M seller carryback at 7.5%.

The seller receives $9.6M cash at closing. Selling costs still $240K. Net cash at close: $9.36M. Year 1 tax obligation: the full $750K of unrecaptured 1250 gain is due regardless of the note (per IRC 453(i)), plus 20% of the residual capital gain (since 80% of the price was received in cash, but the gross profit ratio applies only to residual capital gain after recapture). Residual capital gain: $3.5M. Gross profit ratio on the residual: $3.5M / $9.6M cash-equivalent proceeds. Year 1 residual gain recognized: 80% x $3.5M = $2.8M at 28.8% = $806K. Total Year 1 tax: $750K + $806K = $1.556K. Net cash available for reinvestment after Year 1 tax: $9.36M - $1.556M = $7.80M.

Over Years 2 through 7 the seller collects $180K per year in interest (taxed as ordinary income at a marginal rate around 40% blended federal + state, leaving $108K per year net) and no principal. In Year 7 the balloon returns $2.4M of principal, triggering recognition of the remaining $700K of residual capital gain at 28.8% = $202K. Net proceeds from balloon after tax: $2.4M - $202K = $2.198M.

Ending wealth calculation for Scenario B: reinvest $7.80M at 5.0% for seven years = $10.98M, plus reinvest each $108K net-of-tax interest coupon starting in Year 1 (approximately $918K accumulated by Year 7), plus $2.198M net balloon. Ending wealth: $14.10M.

The two scenarios sit within noise of each other, which is exactly the point. At a 5% reinvestment yield and a 7.5% note coupon, the tax deferral benefit is almost exactly offset by the opportunity cost of tying up capital in the note. Where the seller comes out ahead is when reinvestment yields are lower (bond ladder around 3.5% after tax, common in 2020 to 2022), the note coupon is higher (8% to 9%), the marginal state tax is higher (California, New York, New Jersey), or the seller is at an age where deferring recognition into a lower-tax retirement year has value beyond simple time value.

The seller comes out behind when the buyer's credit is weak (default risk depresses the true expected value of the note), when reinvestment yields are strong (public equity returns of 10%+ after tax during a bull run), or when the seller has a specific reinvestment target (a 1031 replacement property already identified) that offers a higher return than the note coupon. Run the numbers to give the seller a defensible framework for the decision, not to prove one answer.

The Buyer's Blended Cost of Capital

For the buyer, seller financing reduces the blended cost of capital by replacing expensive subordinate capital (mezz at 13%, preferred equity at 15%) with cheaper seller-financed capital (7% to 9%). The blended cost improvement depends on the size of the seller note relative to the capital stack.

On a $12M acquisition with a $2.4M seller note at 7.5%:

• Without seller financing: $7.2M senior (6.5%) + $2.4M mezz (13%) + $2.4M equity. Blended cost of debt: 7.9%.
• With seller financing: $7.2M senior (6.5%) + $2.4M seller note (7.5%) + $2.4M equity. Blended cost of debt: 6.9%.

The 100 bps reduction in blended debt cost flows directly to the equity return. Over a 5-year hold, this translates to approximately 150 to 250 bps of incremental equity IRR depending on leverage and exit cap.

Worked Example: $12M Retail Acquisition

Consider a 30,000 SF anchored retail strip center. Purchase price: $12M. In-place NOI: $840K. Going-in cap rate: 7.0%. The seller purchased the property for $6M in 2011 and has $2.5M of accumulated depreciation (adjusted basis: $3.5M). The gain on sale is $8.5M.

The buyer proposes a $2.4M seller carryback note (20% of the purchase price) at 7.5%, 7-year term, interest-only with a balloon at maturity. The seller accepts because the installment treatment defers approximately $1.4M of capital gains tax.

Annual senior debt service: $7.2M at 6.5%, 25-year amortization = approximately $583K. Annual seller note payment: $180K (IO). Total debt service: $763K. Cash flow to equity: $840K - $763K = $77K. Cash-on-cash: 3.2%.

Compare to the same deal with $2.4M of mezzanine debt at 13% IO: annual mezz payment = $312K. Total debt service: $895K. Cash flow to equity: negative $55K. The seller note saves the buyer $132K annually in debt service, turning a negative-cash-flow deal into a positive one.

At a 5-year exit with 2.5% annual NOI growth and a 7.25% exit cap, the gross sale price is approximately $13.1M. After senior payoff ($6.6M amortized balance), seller note payoff ($2.4M balloon), and closing costs, equity receives approximately $4.0M on a $2.4M investment. Equity IRR: approximately 16.2%. With the mezz alternative, the negative Year 1 cash flow and higher debt service reduce the equity IRR to approximately 13.8%.

Wraparound Mortgage Variants

A wraparound mortgage (sometimes called a "wrap") is a structural variant of seller financing where the seller keeps the existing senior mortgage in place and writes a new, larger note to the buyer that "wraps around" the underlying senior debt. The seller collects a blended payment from the buyer, remits the senior payment to the original lender, and pockets the spread. Wraps are common in residential and small-balance commercial deals, occasionally seen in mid-market CRE, and largely absent from institutional transactions.

The mechanical structure of a wrap:

1. The seller has an existing $5M senior mortgage at 4.5% (a loan originated in the low-rate era pre-2022 that is not assumable in the conventional sense).
2. The buyer acquires the property for $8M. Instead of paying off the senior mortgage at closing, the seller and buyer document a $7M wrap note from the seller to the buyer at 7.0%. The buyer contributes $1M of equity.
3. The buyer makes monthly payments to the seller on the $7M wrap note. The seller continues to make monthly payments on the underlying $5M senior mortgage. The spread between the wrap rate and the senior rate accrues to the seller.
4. When the wrap matures (or the underlying senior mortgage matures, whichever comes first), the buyer refinances or pays off the seller in full, at which point the seller retires the underlying senior mortgage.

Wraps are attractive to buyers when the underlying senior loan is at a substantially below-market rate. In 2026 with senior CRE rates at 6.5% to 7.5%, a wrap over a legacy 3.5% to 4.5% loan produces a blended cost of capital in the 5% to 6% range for the buyer, well below any conventional financing available in the market. That yield pickup is the primary reason wraps saw a small resurgence during 2024 to 2026 as institutional buyers looked for ways to preserve seller-legacy financing.

The primary risk in any wrap is the due-on-sale clause in the underlying senior mortgage. Nearly every institutional CRE loan (agency, CMBS, life company) contains a due-on-sale clause that permits the senior lender to accelerate the loan upon transfer of the underlying property. A wrap that transfers the property (rather than transferring only entity interests, structured to fall outside the due-on-sale trigger) can result in acceleration of the senior loan and unwind the entire transaction. Wraps are routinely structured to transfer entity interests in a manner that (arguably) does not trigger due-on-sale. Whether the structure holds depends on the specific senior loan documents, the borrower entity structure, and the applicable state law. Get an opinion of counsel before assuming the wrap survives senior-lender scrutiny.

A second risk unique to wraps is the credit exposure the buyer takes on the seller. If the buyer pays the seller and the seller fails to remit to the senior lender, the senior lender forecloses and the buyer loses the property despite having paid in full. Wrap agreements typically address this by requiring the buyer to pay a servicing agent (title company, third-party servicer) who splits the payment between the senior lender and the seller. That structure removes the buyer's credit exposure to the seller but adds transaction friction and cost. In institutional wraps, third-party servicing is table stakes.

Subordination and Standstill Negotiations

Every seller carryback note in an institutional CRE transaction has to earn the senior lender's consent. The senior lender's concern is straightforward: the seller-lender is a creditor with the ability to sue, foreclose, or seek other remedies in the event of default, and any such action can interfere with the senior lender's own remedies or reduce the property's value. The senior lender's protection comes from a subordination agreement, a standstill agreement, or (most commonly) both, wrapped into a single Subordination, Non-Disturbance, and Attornment Agreement (SNDA) or a bespoke intercreditor arrangement.

The core terms the senior lender imposes on the seller-lender:

• Lien subordination. The seller's lien on the property (if any) is expressly subordinate to the senior mortgage. In the event of a foreclosure of the senior mortgage, the seller's lien is wiped out.
• Payment subordination in default. If the senior loan is in default, the buyer is prohibited from making payments to the seller. Interest that accrues during the default period may be capitalized or forgiven depending on the agreement. Well-drafted seller notes address this explicitly; poorly drafted ones create a payment paradox where the buyer is prohibited from paying under the senior loan but obligated to pay under the seller note.
• Standstill period. The seller agrees not to exercise any remedies (sue, foreclose, accelerate, seek judgment) for a specified standstill period, typically 90 to 180 days after a default. The purpose is to give the senior lender time to work out the loan without a competing junior creditor complicating matters.
• Waiver of anti-deficiency claims. In some states the seller-lender may have anti-deficiency protections that would bar a personal judgment against the buyer. Senior lenders sometimes require the seller to waive those protections as a condition of consenting to the seller note.
• Cure rights. The seller receives notice of any senior loan default and typically has the right (but not the obligation) to cure the senior default and step into the senior lender's position. This is functionally identical to the cure rights a mezzanine lender receives under a standard intercreditor.
• Restriction on modifications. The seller cannot modify the terms of the seller note (rate, term, amortization, security) without senior lender consent. Similarly, the buyer cannot modify the senior loan in ways that would materially prejudice the seller without seller consent.

The negotiation dynamic between senior lender and seller-lender is asymmetric. The senior lender has the leverage: no consent, no deal. The seller wants to close because closing produces the tax deferral benefit that motivated the carryback in the first place. Sellers who dig in on subordination terms typically discover that the senior lender's requirements are non-negotiable table stakes, drawn from the senior lender's standard-form documents. The room for negotiation is at the margins: length of standstill (90 vs 180 days), scope of cure rights, mechanics of default notification. The core subordination is not up for debate.

Push back on drafting quality. Standard intercreditor forms are mezzanine-focused and contain provisions that make sense for a third-party institutional mezz lender but not for a seller-lender. A seller without specialized counsel can sign a subordination agreement that prevents any collection remedy for the life of the senior loan, converting the seller note into an unsecured, non-callable IOU. Hire counsel who has done these deals before.

Negotiation Dynamics: Who Has Leverage

Seller financing is a negotiated instrument, and the terms reflect who has leverage at the time of the transaction. Understanding the negotiation dynamics helps both sides avoid over-reaching and under-reaching.

When the seller is motivated.

A seller who needs to sell (estate settlement, portfolio wind-down, forced sale, tax-year timing constraint) has diminished leverage. Buyers extract better carryback terms. Common patterns:

• Larger note as a share of price. Motivated sellers accept 25% to 35% carrybacks; unmotivated sellers rarely go above 20%.
• Lower coupon. Motivated sellers accept 5.5% to 6.5% on the note; unmotivated sellers push for 8% or above.
• Longer term. Motivated sellers accept 7- to 10-year terms; unmotivated sellers prefer 3- to 5-year terms to accelerate the tax recognition and free the capital.
• Less restrictive prepayment. Motivated sellers accept freely prepayable notes; unmotivated sellers seek yield-maintenance or minimum-interest-period provisions.
• Weaker security. Motivated sellers accept unsecured notes or pledges of entity interests only; unmotivated sellers demand junior mortgages.

When the buyer is motivated.

A buyer who needs the deal to pencil (tight capital stack, thin returns, 1031 exchange timeline pressure) has diminished leverage. Sellers extract better carryback terms in the opposite direction: smaller note, higher coupon, shorter term, tighter prepayment provisions, stronger security. The buyer accepts unfavorable terms because the alternative (walking from the deal, losing the 1031 identification, missing the tax year, failing to deploy fund capital before an equity commitment expires) is worse than accepting an expensive carryback.

Broker-facilitated conversations often surface the leverage asymmetry before either side commits. A skilled broker will elicit the motivation from both sides during the LOI stage and use it to structure the note in a way that lets both sides believe they got a fair outcome. The National Association of REALTORS Commercial market data tracks broader transaction volume and pricing trends that inform where the leverage sits in the current market cycle.

The equal-leverage midpoint.

In an equal-leverage transaction (both sides motivated to close but neither desperate), the market-clearing seller carryback in 2026 is roughly: 15% to 20% of purchase price, 7.0% to 8.0% coupon, 5- to 7-year term, interest-only with balloon at maturity, freely prepayable after 24 months, secured by a pledge of entity interests, with a standard SNDA and a 90-day standstill. Any deal materially outside those parameters is signaling that one side has more leverage than the other, and the party on the wrong side of the asymmetry should recognize the signal and either walk or extract compensating concessions elsewhere in the deal.

The 2026 Rate Environment

Seller financing is more attractive to buyers when the spread between the seller-note coupon and market subordinate-capital rates is wide. That spread has moved substantially over the last four years, and the 2026 environment is a specific point on that arc worth naming explicitly.

Through 2022 the 10-year Treasury sat below 3%, senior CRE debt priced in the 3.5% to 4.5% range, mezzanine debt at 8% to 10%, and preferred equity at 10% to 12%. Seller notes in that period typically priced at 5% to 6% and offered only modest savings relative to institutional mezz. The tax deferral benefit was the primary motivator, not the coupon arbitrage.

Through 2023 and 2024 the picture inverted. Senior CRE debt moved to 6.5% to 7.5%, mezzanine debt to 13% to 16%, and preferred equity to 14% to 18%. The Federal Reserve SLOOS reported successive quarters of tightening standards on CRE loans, with net percentages of banks tightening standards on nonfarm nonresidential loans exceeding 60% at the peak. Seller carrybacks priced at 6% to 7% became a genuine bargain relative to institutional mezz at 14%. Deals that would not have penciled with conventional subordinate capital penciled with a seller note. Volume of seller-financed transactions rose materially, though seller financing remained a minority of institutional volume.

In 2026 conditions have eased somewhat but not fully normalized. The most recent SLOOS shows lending standards easing for the first time since 2022, though the net percentage of banks reporting eased standards remains modest. Senior debt has moved back toward 6.0% to 6.75%. Mezzanine debt has retreated toward 11% to 13%. Preferred equity toward 12% to 15%. Seller carrybacks are pricing at 7% to 9%, tighter to institutional mezz than during the 2023 to 2024 stress period but still meaningfully cheaper. The spread has narrowed, but the case for seller financing on tax and structural grounds remains intact.

Seller financing volume runs counter-cyclical to institutional mezz availability. In easy-credit environments (early 2022, 2015 to 2019), institutional mezz is cheap and abundant, and buyers use seller financing only for its tax benefits. In tight-credit environments (2023 to 2024, 2008 to 2010), institutional mezz retreats and seller financing fills part of the gap. Buyers who want to normalize seller financing as a repeatable capital source across cycles do it best by building relationships with recurring sellers (fund exits, family-office rebalances, generational transfers) who benefit from installment treatment and treat carrybacks as a standard part of their exit toolkit.

1031 Exchange Interaction

A seller who intends to do a 1031 exchange (deferring all gain by identifying and acquiring replacement property within the 45/180-day windows) cannot also use installment sale treatment. The two strategies are mutually exclusive for the portion of the transaction involved.

However, a seller can combine the two: do a partial 1031 exchange on the cash proceeds and take installment treatment on the seller note. The cash received at closing is used to acquire replacement property under Section 1031. The seller note proceeds, received over time, are subject to installment sale treatment under Section 453. This combination provides maximum tax efficiency: immediate gain is deferred through the 1031, and the note gain is deferred through the installment method.

This requires coordination between the qualified intermediary (QI) handling the 1031 exchange and the closing attorney managing the seller note. The note must be structured so that it is not treated as "boot" (non-qualifying property) under the 1031 rules. Typically, the QI does not take possession of the seller note. The note is established directly between the buyer and the seller, outside the 1031 exchange structure.

Five Mistakes Practitioners Make

1. Ignoring the depreciation recapture. Installment sale treatment defers capital gain, not depreciation recapture. Under IRC Section 1250, the seller must recognize all depreciation recapture in the year of sale regardless of the installment method. On a property with $2.5M of accumulated depreciation, this creates a $625K tax bill in Year 1 that the seller may not have anticipated. Model the recapture separately.

2. Failing to subordinate the note to the senior mortgage. The senior lender will require that the seller note be subordinate to the senior mortgage. If the note is not properly subordinated (via a subordination agreement, standstill, or structural subordination through entity-level documentation), the senior lender may refuse to close. This is a documentation issue. Get it right before closing.

3. Not modeling the balloon payment. Most seller carryback notes are interest-only with a balloon at maturity. The balloon creates a refinancing event that must be modeled in the pro forma. If the note matures in Year 7 and the property's value has declined, the buyer may not be able to refinance the balloon. Model the balloon as a discrete cash outflow and stress-test the refinancing assumption.

4. Underpricing the note from the seller's perspective. A seller note at 7% may seem cheap relative to market mezz rates. But the seller should compare the 7% to their after-tax alternative investment return, not to the buyer's cost of mezz. If the seller can earn 9% after tax in the public markets, the 7% note is suboptimal even with the installment sale benefit. Model the seller's after-tax return to ensure the terms work for both sides.

5. Assuming seller financing is available on any deal. Seller financing requires a willing and able seller. The seller must have the liquidity to defer a portion of the proceeds, the tax position to benefit from installment treatment, and the risk tolerance to carry credit exposure to the buyer. Many institutional sellers (REITs, funds with redemption obligations, estates with distribution requirements) cannot carry notes. Confirm the seller's ability before incorporating seller financing into the capital stack.

Model It in Apers

Related Articles

• Mezzanine Debt and Intercreditor Agreements. The institutional alternative to seller financing. How mezz compares on pricing, enforcement, and senior lender consent.
• Preferred Equity: Priority of Payments and Redemption. The equity-form alternative. How preferred equity compares to seller notes on cost and governance.
• 1031 Exchange Mechanics. How seller financing interacts with 1031 exchange planning. The partial 1031 plus installment sale combination.
• 1031 Boot and Basis Carryover. The tax mechanics of boot recognition when combining a 1031 exchange with a seller carryback note.
• C-PACE Financing. Another non-traditional subordinate capital source. How C-PACE compares to seller financing on cost, term, and structure.