What is seller financing in CRE? Seller financing, also called an owner-carry note or a seller carryback, is a deal structure in which the seller of a commercial property acts as the lender, letting the buyer pay part of the purchase price over time under a promissory note instead of funding the entire price with bank debt at closing. Using AI for seller financing structuring in CRE turns a hand-drawn spreadsheet into a live model that sets the interest rate, amortization, and balloon against real risk, then stress-tests them before anyone signs. It is one of the more technical corners of AI CRE finance and capital markets, and the part where a small pricing error costs the most.
Key Takeaways
- Seller financing lets the buyer pay part of the price over time under a promissory note, with the seller carrying the balance instead of a bank funding it at closing.
- Pricing an owner-carry note is a separate task from choosing a structure; the rate, term, amortization, balloon, and remedies each move the value and the risk.
- AI sets the interest rate by starting from the applicable federal rate, adding a risk premium for the buyer, the LTV, and the property, then checks the note clears the IRS imputed-interest floor.
- The balloon is the real risk in a carry note; AI sizes the balloon balance and projects refinance feasibility against future rates and DSCR.
- AI runs every rate, term, and balloon variation in seconds, but a CPA and a real estate attorney confirm the tax treatment and enforceability before signing.
Pricing the Note Is a Different Job Than Choosing the Structure
Choosing whether to use seller financing is a strategy question; pricing the note is a math question, and they are easy to conflate. Deciding between a straight carryback, a master lease, or a wraparound mortgage is about which structure fits the deal, and our guide on AI seller financing analysis and creative deal structures in CRE covers that decision in depth. This article assumes the structure is chosen and answers the next question: what interest rate, term, amortization, and balloon make the owner-carry note fair, financeable, and compliant. Get the structure right and misprice the note, and you either overpay for capital or hand the seller a return that erodes your cash-on-cash. AI matters here because pricing a note is a multi-variable problem, and the variables interact.
The Five Terms That Set the Price of an Owner-Carry Note
An owner-carry note is priced by five interacting terms, and changing one forces the others to move. AI lets you hold four constant and solve for the fifth, which is how you negotiate from numbers instead of instinct.
- Interest rate: the headline number, but only one of five. It must clear the IRS imputed-interest floor and reflect the buyer's credit and the property's risk.
- Term and amortization: a note often amortizes on a 25 or 30 year schedule to keep payments low while maturing in 5 to 7 years. The gap between the two creates the balloon.
- Balloon: the lump-sum balance due at maturity. It is the single biggest risk in the structure and the term buyers undermodel most.
- Down payment and LTV: the seller's equity cushion. A larger down payment lowers the seller's loan-to-value and justifies a lower rate.
- Security and remedies: whether the note is secured by a first or second lien, whether there is a personal guarantee, and what the default and cure terms are. These do not change the payment but they change the price of risk.
Pricing the Interest Rate: AFR, Risk Premium, and Imputed Interest
The interest rate on a carry note is priced from the bottom up: start at the floor the IRS requires, then add a premium for risk. The floor is the applicable federal rate, or AFR, the minimum rate the IRS publishes monthly for seller-financed and other private loans. Price the note below the AFR and the IRS can impute interest anyway under the imputed-interest rules, creating phantom taxable income for the seller, so the AFR is a hard floor, not a suggestion. AI pulls the current AFR for the note's term and confirms your rate clears it.
Above the floor, the rate reflects risk. AI builds the premium from the buyer's credit profile, the loan-to-value ratio, the property type and its cash-flow stability, and where comparable bank debt is priced. In a high-rate market, a seller carry priced one to two points below conventional debt can still beat the bank for the buyer while giving the seller a better yield than cash in a money-market account. The model shows both sides that trade, which is what actually closes negotiations. For owner-occupied deals, compare the carry against an AI SBA loan analysis for commercial real estate before committing, because an SBA 504 can beat a carry on rate even when the seller is motivated.
Sizing the Balloon and Modeling Refinance Risk with AI
The balloon is where carry notes go wrong, so it deserves its own model. Because the note amortizes slowly but matures early, a large principal balance comes due in a single payment, usually refinanced with a new loan. AI calculates the exact balloon balance at maturity from the amortization schedule, then projects whether you can refinance it. That projection is the real underwriting: it takes your forecast net operating income, applies a stressed future interest rate and a lender's debt-service-coverage-ratio requirement, and tests whether the refinanced loan actually covers the balloon.
If the projected DSCR at refinance falls below the roughly 1.20x to 1.25x most lenders require, the balloon is a problem you fix now, by extending the term, adding an extension option, or negotiating a lower balance, not a surprise you meet at maturity. This balloon-and-takeout modeling is the same discipline that drives the structuring math in AI manufactured housing master lease and seller financing structuring, applied to a general CRE carry note.
How AI Prices and Stress-Tests the Note
The practical workflow uses AI as a modeling and scenario engine. Give ChatGPT or Claude the purchase price, the proposed down payment, the seller's target yield, the note term, and your NOI forecast, and ask it to build the amortization schedule, the balloon balance, the buyer's cash-on-cash return, and the seller's effective yield in one pass. Then ask for the trade-offs: how the rate has to move if the down payment drops, or how the balloon changes if the amortization stretches from 25 to 30 years.
The value is in the variations. A spreadsheet runs one scenario at a time; AI runs a grid, showing the rate, term, and balloon combinations that satisfy both parties. It also drafts the plain-language summary you take into the negotiation, so the seller sees their yield and you see your return in the same table. Keep in mind that cash-on-cash return here accounts for debt service on the note, unlike the cap rate, which is net operating income over price and ignores financing, so make sure the model compares the right metric to the right decision. If a mispriced note could sink a deal, a second look from Avi Hacker, J.D. at The AI Consulting Network can catch the problem before you sign.
Implementation Steps for Pricing a Carry Note
- Pull the AFR first: confirm the note's rate clears the current applicable federal rate for its term before anything else.
- Model the balloon and the takeout: calculate the maturity balance and stress-test the refinance at a higher future rate and a real DSCR hurdle.
- Solve for the trade: use AI to find the rate, down payment, and term that hit the seller's yield and your return at the same time.
- Confirm the tax treatment: a seller carry usually qualifies as an installment sale for the seller, which spreads the gain; have a CPA confirm before drafting.
- Have counsel paper the note: the security, guarantee, and default terms belong to a real estate attorney, not the model.
If you want this built into a reusable pricing model your team can run on every deal, The AI Consulting Network works with CRE investors to design exactly that kind of workflow.
Frequently Asked Questions
Q: How does AI decide the interest rate on a seller-financed note?
A: AI starts from the applicable federal rate as the legal floor, then adds a risk premium based on the buyer's credit, the loan-to-value ratio, the property type, and where comparable bank debt is priced. It confirms the final rate clears the AFR so the IRS does not impute interest.
Q: What is the biggest risk in an owner-carry note?
A: The balloon payment. Because the note usually amortizes over 25 to 30 years but matures in 5 to 7, a large balance comes due at maturity that must be refinanced. If future rates rise or NOI falls, the refinance may not cover the balloon, which is why AI stress-tests the takeout up front.
Q: Is seller financing an installment sale for tax purposes?
A: Usually, yes. When the seller carries a note and receives payments over more than one tax year, it typically qualifies as an installment sale, which spreads the taxable gain across the years payments are received. Confirm the specific treatment with a CPA, because depreciation recapture and other rules can change the result.
Q: Can AI draft the actual promissory note?
A: AI can draft a plain-language term sheet and summarize the economics, but the enforceable promissory note, security instrument, and guarantee should be prepared or reviewed by a real estate attorney. AI prices and structures the deal; counsel makes it binding.