Seller Financing in Commercial Real Estate: How It Works and Why Sellers Offer It

Seller financing, sometimes called owner financing, a purchase-money mortgage, or "the seller carrying paper", is a transaction where the seller acts as the lender. Instead of receiving the full purchase price in cash at closing, the seller receives a down payment plus a promissory note from the buyer, secured by a mortgage or deed of trust on the property itself. The buyer makes payments to the seller over time on negotiated terms.

It is one of the oldest structures in real estate, and in certain markets, smaller commercial assets, long-held family properties, periods when bank credit is expensive or tight, it is quietly one of the most common. This piece explains the mechanics, the standard terms, and the specific reasons a rational seller offers it. It is educational, not a recommendation for any particular transaction, and nothing here is an offer of securities or of financing.

The basic structure

A seller-financed commercial deal has the same closing as any other: title transfers to the buyer at closing, the buyer owns the property, and the buyer collects the rents. The difference is on the payment side. A representative structure, using round numbers purely as an illustration:

• Purchase price: $5,000,000
• Down payment at closing: $1,500,000 (30%)
• Seller note: $3,500,000, secured by a first mortgage on the property
• Rate: 6.0% fixed
• Payments: interest-only for years 1-3, then amortizing on a 25-year schedule
• Maturity: balloon at year 5, with one 12-month extension option for a 0.5% fee

The seller receives $1.5 million at closing, then $17,500 per month in interest during the IO period, then a balloon payoff of the remaining principal when the buyer sells or refinances. The buyer gets fixed-rate financing without a bank.

Every term above is negotiable, and that is the structural point: seller financing replaces a bank's rate sheet with a direct negotiation between two parties who each know the asset.

The standard terms, one at a time

The note and the security instrument

The debt lives in two documents. The promissory note states the amount owed, the rate, the payment schedule, and the maturity. The mortgage (or deed of trust, depending on the state) is recorded against the property and gives the seller the right to foreclose if the note goes unpaid. A seller carrying a first-position note has essentially the same collateral position a bank would have, first claim on the real estate, ahead of the buyer's equity.

Down payment

Commercial seller notes typically require 20-40% down. The down payment does two jobs: it gives the seller meaningful cash at closing, and it puts enough buyer equity below the note that the seller is protected against moderate value declines. A seller carrying 70% of the price is exposed only if the property loses more than 30% of its value and the buyer defaults, a stacked condition.

Interest rate

Seller notes usually price between two anchors: what the seller could earn reinvesting the cash (treasuries, CDs, a bond ladder) and what a bank would charge the buyer for the same loan. That gap is often 150-300 basis points wide, and the negotiated rate lands inside it, leaving both sides better off than their alternative. Rate also trades against price, a seller who wants a full-price contract may concede rate, and a buyer who wants a low fixed rate may concede price.

Interest-only periods

Many seller notes begin with an interest-only (IO) period of one to three years. For the buyer, IO payments preserve cash flow during the early hold, often the period when a value-add plan (lease-up, converting gross leases to NNN at renewal, deferred maintenance) is consuming capital. For the seller, IO keeps the principal balance, and therefore the interest income, at its maximum. IO is one of the few loan terms where both parties' preferences frequently point the same direction.

Amortization and the balloon

Almost no seller wants to hold a note for a full 25- or 30-year amortization. The standard solution is a balloon: the note amortizes (or stays interest-only) on a long schedule but matures in 3-7 years, at which point the remaining balance is due in full. The buyer retires the balloon by selling the property or refinancing with conventional debt. Buyers underwriting a balloon should assume refinancing conditions at maturity may be worse than at closing, and size the balloon so the deal still works at a materially higher refinance rate, or plan the hold so a sale, not a refinance, is the base case.

Extension options

The most commonly under-negotiated term. An extension option gives the buyer the right, not the obligation, to push the balloon out, typically 12 months at a time for a fee of 25-50 basis points on the outstanding balance, sometimes with a modest rate step-up. Extensions cost little to ask for at contract and are nearly impossible to get once maturity is near. From the seller's side, a paid extension is usually preferable to a workout or a foreclosure at an inconvenient moment.

Recourse and carve-outs

Seller notes are frequently non-recourse: if the buyer defaults, the seller's remedy is the property, not the buyer's other assets. Sellers accept this more readily than banks because their downside scenario, taking back a property they may have owned for decades, is one they are uniquely equipped to handle. Non-recourse notes still carry standard carve-out guarantees ("bad-boy" provisions) that make principals personally liable for fraud, intentional waste, misapplied insurance proceeds, or unauthorized transfers. Buyers should read carve-outs carefully; sellers should insist on them.

Why sellers offer it

Seller financing is not charity. Sellers carry paper because, in specific situations, it makes them better off than a cash closing.

1. Installment-sale tax treatment

Under IRC Section 453, a seller who receives payments over multiple years can generally recognize the capital gain proportionally as principal is received, rather than all at once in the year of sale. For a long-held property with a low basis, spreading a large gain across several tax years, potentially keeping the seller in lower brackets and deferring the liability, can be worth a significant amount relative to a lump-sum sale. (Depreciation recapture rules and individual circumstances vary; this is a structural observation, not tax advice, sellers model this with their CPA.)

2. The note is a good asset

A 6% fixed note secured by a first mortgage on a property the seller operated for twenty years is, for many sellers, a better risk-adjusted instrument than what they would buy with the cash. They know the tenants, the roof, and the trade area. Their "underwriting file" is two decades of ownership. For a retiring owner, a seller note converts a management-intensive property into a monthly check without giving up yield.

3. A wider buyer pool and a stronger price

A property offered with seller financing is accessible to buyers who cannot or will not use bank debt, including disciplined buyers who avoid floating-rate leverage as a matter of policy. More qualified bidders generally means better pricing and better terms for the seller. In slow credit environments, "financing available" is often the difference between a marketed listing and a stale one.

4. Certainty and speed of close

A seller-financed deal has no lender: no appraisal ordered by a third party, no credit committee, no retrade triggered by a bank's revised terms. The two principals negotiate, sign, and close. For sellers who have watched bank-financed contracts die in escrow, execution certainty has real value.

Where it fits for a buyer

For an acquirer, a fixed-rate seller note is one of the few forms of leverage that shares the defining virtue of an all-cash position: the cost of capital is known on day one and cannot move against you. There is no rate cap to buy, no SOFR reset, no lender covenant tied to a debt-service ratio that a temporary vacancy can trip. Stoneforge's acquisition approach treats seller financing exactly this way, used only when fixed terms genuinely strengthen a deal, never as a substitute for buying the asset right, and never in floating-rate form.

The discipline that matters on the buy side: underwrite the deal to work without the financing, treat the balloon date as a real deadline, negotiate extensions before signing, and never let attractive paper rescue an unattractive property. A good note on a bad building is still a bad building.

What can go wrong

Honest treatment requires the failure modes. For buyers: a balloon maturing into a frozen refinance market, an under-documented note with ambiguous default provisions, or a seller who dies mid-term leaving the note to an estate with different incentives. For sellers: a buyer who undermaintains the collateral, a second mortgage recorded behind the seller's first without consent (prohibit this in the documents), or the simple operational burden of servicing a loan. Most of these are drafting problems, solvable with competent counsel and documents that anticipate the ugly scenarios rather than assuming the happy path.

Seller financing rewards parties who negotiate the whole life of the note at the term sheet stage. The time to plan the exit from the loan is before entering it.