Seller financing rules: Reg Z, Dodd-Frank, and the AFR

The short answer

Seller financing is not a single legal category. The rules depend on:

• Who is lending.
• What the property is used for.
• How many properties the seller finances.
• What the repayment terms look like.
• Where the property is located.

The federal Reg Z seller-financer rules are a good starting point, but they are not the whole analysis. State licensing, usury, foreclosure, disclosure, and tax rules can apply independently.

The seller financing calculator includes compliance guardrails and an applicable-federal-rate check. It does not provide legal advice or a legal conclusion.

Business purpose vs. consumer purpose

The first question is usually the purpose of the credit.

• Business-purpose financing: the proceeds are used for a business or investment purpose, such as a rental property held for investment.
• Consumer-purpose financing: the credit is primarily for personal, family, or household purposes, such as a borrower buying a home to live in.

Reg Z’s consumer-mortgage rules generally apply to consumer-purpose credit secured by a dwelling. A rental property held for investment is often business-purpose, but labels are not enough. The facts matter, including the borrower’s intent, the property’s use, and the structure of the transaction.

An owner-occupied seller-financed purchase is more likely to be consumer-purpose. A rental property with a business-purpose borrower and a business-purpose lender is more likely to be outside Reg Z. A mixed-use property, a second home, or a property that the buyer intends to occupy can complicate the analysis.

The calculator asks for occupancy and shows a Reg Z review flag when the deal is owner-occupied. Treat that as a prompt to get counsel involved, not as an answer.

The Reg Z seller-financer exemptions

The loan-originator rules in 12 CFR 1026.36 include two seller-financer exemptions.

Three-property exemption

A person that provides seller financing for three or fewer properties in any 12-month period may qualify if:

1. Each property is owned by the person and serves as security for the financing.
2. The person has not constructed, or acted as a contractor for the construction of, a residence on the property in the ordinary course of business.
3. The financing is fully amortizing.
4. The person determines in good faith that the consumer has a reasonable ability to repay.
5. The financing has a fixed rate, or an adjustable rate that adjusts after five or more years, with reasonable annual and lifetime limitations.

The three-property exemption is available to a broader set of owners, including entities. The fully amortizing requirement is important: a 30-year amortization with a 5-year balloon is not fully amortizing. That structure may not fit the exemption even if the seller finances only one property.

One-property exemption

A natural person, estate, or trust that provides seller financing for one property in any 12-month period may qualify if:

1. The property is owned by the natural person, estate, or trust and serves as security.
2. The person has not constructed, or acted as a contractor for the construction of, a residence on the property in the ordinary course of business.
3. The repayment schedule does not result in negative amortization.
4. The financing has a fixed rate, or an adjustable rate that adjusts after five or more years, with reasonable limitations.

The one-property exemption uses a different repayment test. It does not use the same “fully amortizing” language as the three-property exemption, but it still requires a careful review of the balloon, negative amortization, and state law.

Neither exemption is a general safe harbor for every legal issue. They address whether the seller is a “loan originator” under the federal rule. Other requirements can still apply.

Ability to repay

The three-property exemption requires a good-faith determination that the consumer has a reasonable ability to repay. The official interpretation points to the ATR rule and alternative criteria, including income, assets, employment, and other sources.

A seller should document the analysis. A handwritten rent estimate is not a credit file. Reasonable documentation can include:

• The buyer’s income and employment information.
• Tax returns or financial statements.
• Bank statements and reserves.
• The rental income and operating expenses.
• The buyer’s other debt obligations.
• A written underwriting summary.

A calculator can help with the property-level DSCR, but it does not replace a consumer underwriting file. If the loan is consumer-purpose, the ATR and QM rules can be detailed. Get professional help before closing.

The balloon problem

A balloon payment is a common seller-financing feature. It is also a compliance and credit-risk issue.

• The three-property exemption requires fully amortizing financing, so a balloon with a long amortization may fail that test.
• The one-property exemption focuses on negative amortization, but a balloon still creates a refinance deadline and potential consumer harm.
• The buyer’s ability to repay at the balloon may depend on a refinance that is not guaranteed.
• State consumer-protection laws may treat balloons differently.

The calculator flags a balloon and shows the refinance gap. A positive cash-out at a projected value is not proof that the buyer can refinance. Run the flat-value and higher-rate stress cases.

The applicable federal rate

The IRS publishes applicable federal rates monthly. The AFR is used for certain below-market loans and imputed interest rules. It is organized by term:

• Short-term: three years or less.
• Mid-term: over three years and up to nine years.
• Long-term: over nine years.

A seller note below the AFR can create imputed interest, which changes the tax treatment for the seller and potentially the buyer. The AFR is not a usury ceiling, and it does not establish that the loan is affordable or legally compliant.

The calculator compares the note rate with the AFR tier for the note term. If the rate is below the AFR, the compliance panel flags it. That flag is a prompt for tax and legal review, not a conclusion that the loan is prohibited.

State law still matters

Federal Reg Z is only one layer. State law can impose:

• Mortgage-loan-originator licensing.
• Consumer-lender licensing.
• Usury limits.
• High-cost mortgage rules.
• Foreclosure and notice requirements.
• Seller-financing disclosure requirements.
• Restrictions on balloons or negative amortization.
• Nonresident withholding and tax reporting.

A federal seller-financer exemption does not automatically satisfy state law. The property’s location, the buyer’s residence, and the seller’s business location can all matter.

A practical compliance checklist

Before signing a seller-financed note:

1. Identify the purpose of the credit and the occupant.
2. Confirm the property’s use and the borrower’s intent.
3. Count the properties the seller has financed in the last 12 months.
4. Determine whether the seller is a natural person, estate, trust, or entity.
5. Check whether the financing is fully amortizing or has a balloon.
6. Document the buyer’s ability to repay if consumer-purpose rules apply.
7. Confirm the rate is fixed or adjusts only after five or more years.
8. Compare the note rate with the AFR for the term.
9. Review state licensing, usury, and disclosure requirements.
10. Have counsel review the note, mortgage or deed of trust, and disclosures.

The compliance analysis is not a substitute for the deal math. A legally structured note can still be a bad investment if the buyer cannot pay or refinance.

How the calculator helps

The seller financing calculator does three compliance-adjacent things:

• It asks for occupancy and the number of properties financed in the last 12 months.
• It compares the note rate with the AFR tier for the note term.
• It flags review points, including balloons, interest-only periods, owner-occupancy, and below-AFR rates.

It does not determine whether Reg Z applies, whether an exemption is available, or whether the loan is legal in a particular state. Those are legal questions for qualified counsel.

The bottom line

Seller financing can be a flexible, useful tool for rental deals. It also sits at the intersection of consumer-protection law, tax law, and state licensing.

Use the federal seller-financer rules as a map, not a safe harbor. Document the file, check the AFR, stress the balloon, and get local counsel before you sign.