Seller Financing Addendum Template

A free seller financing addendum that attaches to an existing real estate purchase agreement and sets the loan terms the seller is carrying: principal, interest, monthly payment, balloon, and remedies on default. Download in PDF or Word and fill in the bracketed fields.

Last updated: August 5, 2026

What Is a Seller Financing Addendum?

A seller financing addendum is a supplement to a signed real estate purchase agreement in which the seller agrees to act as the lender for part or all of the purchase price instead of the buyer bringing a bank loan to closing. The addendum does not replace the purchase agreement; it amends it, adding the credit terms that a conventional transaction would leave to a mortgage company. In practice, the addendum sets the financed amount, the interest rate, the payment schedule, the maturity date, and the consequences of missing a payment, and it directs the parties to execute a promissory note and a security instrument at closing.

Two separate documents do the real legal work at closing, and the addendum is what commits both sides to sign them. The promissory note is the buyer written promise to repay the debt and is the instrument that can be sued on if payments stop. The deed of trust or mortgage, depending on the state, is the security instrument that pledges the property as collateral and gets recorded in the county records so the seller has a lien with priority. Without a recorded security instrument, a seller who carries financing is an unsecured creditor with a promise and no property to take back, which is why the recording provisions in this addendum are not boilerplate.

When to Use This Template

  • The buyer cannot qualify for conventional financing but has a meaningful down payment
  • The seller owns the property free and clear and wants monthly income instead of a lump sum
  • The property will not appraise or does not fit standard lending guidelines
  • The parties want to close quickly without waiting on an institutional underwriting timeline
  • A commercial or investment property is being sold between parties who already know each other
  • A purchase agreement is already signed and the financing terms now need to be documented in writing

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Full text of the template. Fields in [BRACKETS] are placeholders you fill in.

Seller Financing Addendum

  1. 1. 1. Addendum to Purchase Agreement

    This Seller Financing Addendum (the "Addendum") is made as of [ADDENDUM DATE] and is attached to and made part of that certain Real Estate Purchase Agreement dated [PURCHASE AGREEMENT DATE] (the "Purchase Agreement") between [SELLER NAME], of [SELLER ADDRESS] (the "Seller"), and [BUYER NAME], of [BUYER ADDRESS] (the "Buyer"), for the property commonly known as [PROPERTY ADDRESS, CITY, STATE, ZIP], legally described as [LEGAL DESCRIPTION] (the "Property"). All terms defined in the Purchase Agreement have the same meaning here. This Addendum amends the Purchase Agreement only as to the matters expressly stated below, and all other provisions of the Purchase Agreement remain in full force and effect. If any provision of this Addendum conflicts with the Purchase Agreement, this Addendum controls. The financing described here replaces any financing contingency in the Purchase Agreement to the extent of the amount financed by the Seller.

  2. 2. 2. Purchase Price, Down Payment, and Amount Financed

    The total purchase price for the Property is [PURCHASE PRICE]. At closing, the Buyer will pay a down payment of [DOWN PAYMENT AMOUNT] in cash or certified funds, less any earnest money credited under the Purchase Agreement, and the Buyer will obtain third-party financing of [THIRD-PARTY LOAN AMOUNT, or write "none"]. The Seller will finance the remaining balance of [SELLER-FINANCED PRINCIPAL] (the "Financed Amount") on the terms set out in this Addendum. The Financed Amount will be evidenced by a promissory note and secured as described in Section 3, both executed and delivered at closing as a condition of the Seller obligation to convey title. The Buyer will provide the Seller, no later than [DOCUMENTATION DEADLINE, e.g., 10 days] before closing, the financial documentation listed in Exhibit A, and the Seller may terminate this Addendum by written notice if the documentation is not delivered or does not reasonably support the Buyer ability to repay the Financed Amount.

  3. 3. 3. Promissory Note, Security Instrument, and Recording

    At closing the Buyer will execute and deliver to the Seller (a) a promissory note in the principal amount of the Financed Amount, in the form attached as Exhibit B (the "Note"), and (b) a [DEED OF TRUST OR MORTGAGE, as customary in the state where the Property is located] encumbering the Property and securing payment of the Note, in the form attached as Exhibit C (the "Security Instrument"). The Security Instrument will be in [LIEN POSITION, e.g., first] lien position, subordinate only to the liens expressly listed in Exhibit D. The Security Instrument will be recorded in the official real property records of [COUNTY AND STATE] immediately following the recording of the deed at closing, and the Seller will not be obligated to close unless recording is arranged through [TITLE COMPANY OR CLOSING AGENT]. The closing agent will also obtain a lender title insurance policy in favor of the Seller in the amount of the Financed Amount, at the expense of [WHO PAYS TITLE POLICY]. All costs of preparing and recording the Note and Security Instrument will be paid by [WHO PAYS DOCUMENT COSTS].

  4. 4. 4. Interest Rate, Amortization, and Monthly Payment

    The Financed Amount will bear interest at a fixed annual rate of [INTEREST RATE] percent, computed on the unpaid principal balance on the basis of a [DAY COUNT BASIS, e.g., 360-day year of twelve 30-day months]. Principal and interest are payable in monthly installments of [MONTHLY PAYMENT AMOUNT], based on an amortization schedule of [AMORTIZATION PERIOD, e.g., 30 years], with the first installment due on [FIRST PAYMENT DATE] and subsequent installments due on the [DUE DAY, e.g., first] day of each month thereafter. The loan term is [LOAN TERM, e.g., 5 years], and the entire unpaid balance is due on [MATURITY DATE]. In no event will the interest rate or any charge under this Addendum exceed the maximum rate permitted by applicable law, and any amount collected in excess of that maximum will be applied to principal or refunded. The Seller will provide the Buyer with an annual statement of the account showing payments received, interest charged, and the remaining principal balance, and will provide a payoff statement within [PAYOFF STATEMENT PERIOD, e.g., 10 days] of a written request.

  5. 5. 5. Balloon Payment

    IMPORTANT: THIS LOAN IS NOT FULLY AMORTIZED. Because the amortization period in Section 4 is longer than the loan term, the monthly installments will not repay the Financed Amount by the maturity date. On [MATURITY DATE] the entire remaining unpaid principal balance, together with all accrued and unpaid interest and any other amounts due, becomes immediately payable in a single lump sum estimated at approximately [ESTIMATED BALLOON AMOUNT] (the "Balloon Payment"). The Buyer acknowledges that the Buyer, and not the Seller, bears the risk of being able to refinance, sell, or otherwise pay the Balloon Payment when it comes due, and that the Seller has made no promise, representation, or commitment to refinance, extend, modify, or renew the loan. The Seller will send the Buyer a written reminder of the upcoming Balloon Payment at least [BALLOON NOTICE PERIOD, e.g., 90 days] before the maturity date. Any extension of the maturity date is effective only if made in a written amendment signed by both Parties, and the Seller may condition an extension on payment of an extension fee of [EXTENSION FEE] and on a revised interest rate.

  6. 6. 6. Late Charges, Prepayment, and Application of Payments

    If any installment is not received in full within [GRACE PERIOD, e.g., 10 days] after its due date, the Buyer will pay a late charge of [LATE CHARGE PERCENTAGE OR AMOUNT], not to exceed the maximum permitted by applicable law, and any payment returned unpaid carries an additional fee of [RETURNED PAYMENT FEE]. Payments will be applied first to accrued late charges and advances made by the Seller under Section 7, then to accrued interest, and then to principal. The Buyer may prepay all or any part of the principal at any time [WITHOUT PENALTY, or state the prepayment charge: PREPAYMENT PENALTY TERMS], and partial prepayments will be applied to the principal balance without reducing or deferring the amount of any scheduled installment unless the Seller agrees otherwise in writing. Payments will be delivered to [PAYEE NAME AND ADDRESS OR ACCOUNT], and the Parties may agree in writing to use a third-party loan servicer, whose fees will be paid by [WHO PAYS SERVICER]. Acceptance of a partial or late payment does not waive the right of the Seller to require full and timely payment of every other installment.

  7. 7. 7. Taxes, Insurance, and Escrow

    The Buyer will pay, before delinquency, all real property taxes, assessments, and homeowner association dues levied against the Property, and will maintain hazard insurance on the improvements in an amount not less than [MINIMUM INSURANCE AMOUNT] with the Seller named as mortgagee or loss payee, plus any flood insurance required for the Property. The Buyer will deliver evidence of paid taxes and current insurance to the Seller within [PROOF DEADLINE, e.g., 15 days] of written request and will ensure the insurer gives the Seller at least [CANCELLATION NOTICE, e.g., 30 days] notice of cancellation or non-renewal. If the Parties elect an escrow arrangement by initialing here ______, the Buyer will pay the Seller or the designated servicer, with each monthly installment, one-twelfth of the estimated annual taxes and insurance premiums, and those funds will be held and disbursed for that purpose and reconciled annually. If the Buyer fails to pay taxes or maintain insurance, the Seller may pay them, and any amount so advanced will be added to the principal balance, will bear interest at the rate in Section 4, and will be immediately due from the Buyer.

  8. 8. 8. Due-on-Sale and Transfer Restrictions

    If all or any part of the Property or any interest in it is sold, conveyed, assigned, leased for a term exceeding [LEASE LIMIT, e.g., three years], or otherwise transferred by the Buyer without the prior written consent of the Seller, the Seller may declare the entire unpaid balance of the Note immediately due and payable. The Buyer will not further encumber the Property with any deed of trust, mortgage, or other voluntary lien that would be senior to or on parity with the Security Instrument without the prior written consent of the Seller, and will remove any involuntary lien, including any mechanic or judgment lien, within [LIEN REMOVAL PERIOD, e.g., 30 days] after it attaches. The Buyer will keep any senior loan disclosed in Exhibit D current and will immediately notify the Seller of any notice of default on it. The Seller may, in its discretion and on written request, consent to an assumption of the Note by a qualified transferee, subject to an assumption fee of [ASSUMPTION FEE] and to the Seller review of the financial condition of the transferee, and no assumption releases the Buyer from liability unless the Seller agrees to a release in writing.

  9. 9. 9. Default, Remedies, and Foreclosure

    The Buyer is in default if any payment is not made within [PAYMENT DEFAULT PERIOD, e.g., 15 days] after its due date, if the Buyer fails to pay taxes or maintain required insurance, if the Buyer breaches any other covenant of this Addendum, the Note, or the Security Instrument and does not cure within [CURE PERIOD, e.g., 30 days] after written notice, or if the Buyer becomes the subject of a bankruptcy or insolvency proceeding. On default and after giving any notice and cure opportunity required by applicable law and by the Security Instrument, the Seller may declare the entire unpaid balance immediately due and payable and may enforce the Security Instrument by judicial or non-judicial foreclosure as permitted in [PROPERTY STATE], may appoint a receiver where allowed, and may pursue any other remedy available at law or in equity. The Buyer will pay all costs of collection and enforcement, including reasonable attorney fees, trustee fees, title costs, and court costs, to the extent permitted by applicable law. The remedies of the Seller are cumulative, and no delay or partial exercise of a remedy waives any other. On payment in full, the Seller will promptly execute and deliver a release, reconveyance, or satisfaction of the Security Instrument for recording within [RELEASE DEADLINE, e.g., 20 days].

  10. 10. 10. Signatures

    By signing below, each Party acknowledges having read this Addendum, having had the opportunity to consult independent legal, tax, and lending counsel, and agreeing that it amends and forms part of the Purchase Agreement. Escrow of taxes and insurance elected (initial): Yes ______ / No ______. SELLER: [SELLER NAME]. Signature: ______________________. Printed Name: [SELLER SIGNER NAME]. Date: [DATE]. BUYER: [BUYER NAME]. Signature: ______________________. Printed Name: [BUYER SIGNER NAME]. Date: [DATE]. This Addendum may be executed in counterparts, and electronic signatures have the same effect as original signatures. The Note and the Security Instrument will be executed separately at closing and, where required, acknowledged before a notary public.

  11. 11. Disclaimer

    This template is provided for general informational purposes only and is not legal advice. Seller-financed real estate transactions are governed by state law that varies significantly, including the form of the security instrument, foreclosure procedure, usury limits, and required disclosures, and residential seller financing is additionally subject to federal consumer lending rules. Review and adapt this document for your own property, facts, and state, and have a licensed real estate attorney and a title company in the state where the property sits prepare or review the promissory note, the deed of trust or mortgage, and the closing and recording steps before you sign. Use of this template does not create an attorney-client relationship with ScanContract.

Key Clauses Explained

What each important clause does — and what to watch out for before you sign.

Promissory Note and Security Instrument

Commits both parties to sign the note that creates the debt and the mortgage or deed of trust that secures it against the property.

Sellers should never close on a promise alone: without a recorded security instrument you are an unsecured creditor and cannot take the property back if payments stop, so confirm the recording actually happens through the closing agent. Buyers should read the security instrument as carefully as the note, because it contains the acceleration and foreclosure machinery, and should verify the lien position matches what was negotiated rather than quietly sitting behind an undisclosed senior loan.

Interest Rate and Amortization Schedule

Sets what the buyer pays for the money and how each monthly installment splits between interest and principal.

Buyers should ask for a full amortization schedule before signing rather than just a monthly payment number, since a long amortization with a short term means almost nothing goes to principal in the early years. Sellers should confirm the rate sits under the usury cap in the property state, because an overstated rate can void the interest entirely in some jurisdictions and turn a profitable note into an interest-free loan.

Balloon Payment

Makes the entire remaining balance due in a single lump sum on the maturity date.

This is the single most dangerous term in seller financing for the buyer: if you cannot refinance or sell when the balloon comes due, you lose the property regardless of how many payments you made on time, and the seller is under no obligation to extend. Sellers should keep the no-promise-to-refinance language and the advance reminder notice, because a buyer who claims an extension was verbally promised can slow a foreclosure considerably, and some jurisdictions restrict balloon features on owner-occupied residential loans.

Late Charges and Prepayment

Prices late payments and states whether the buyer can pay the loan off early without a penalty.

Buyers planning to refinance out of the note should confirm there is no prepayment penalty, since a penalty can make an early exit uneconomic exactly when a refinance becomes available. Sellers relying on the interest stream may want a prepayment charge, but should check that the charge and the late fee are within statutory limits, because an unenforceable fee is often the first thing a defaulting borrower raises in court.

Escrow for Taxes and Insurance

Collects a monthly share of property taxes and insurance premiums so those obligations do not fall behind.

Sellers should push for escrow: unpaid property taxes create a lien that outranks your mortgage, and a lapsed hazard policy means your collateral can burn down with no coverage. Buyers should confirm the escrow is reconciled annually with a written statement and that any surplus is refunded, and should require that the seller be named as loss payee rather than being asked to insure the seller separately.

Due-on-Sale Clause

Lets the seller call the entire balance due if the buyer transfers the property or further encumbers it.

Buyers should look hard at how broadly transfer is defined, since some drafts sweep in a transfer into a living trust, an entity restructuring, or a long-term lease and give the seller a trigger you never intended to pull. Sellers should keep the clause and the restriction on junior liens intact, because the whole point is that you extended credit to a specific person whose finances you reviewed, and should note that any assumption without a written release leaves the original buyer on the hook.

Default and Foreclosure Remedies

States what counts as a default and how the seller enforces the debt against the property.

Buyers should insist on a written notice and a real cure period rather than instant acceleration on a single late payment, and should understand that foreclosure procedure and timeline are set by state law, not by whatever the contract says. Sellers should make sure the remedy clause matches the enforcement path actually available in the property state, since a deed of trust with a power of sale and a judicial-foreclosure mortgage behave very differently and the wrong document costs months.

Documentation of Buyer Ability to Repay

Requires the buyer to deliver financial information the seller can rely on before agreeing to carry the loan.

Sellers financing a residential purchase should treat this as a compliance step, not a courtesy, because federal rules on residential seller financing can require a good-faith determination that the borrower can repay. Buyers should confirm the documentation list is finite and delivered on a defined deadline, so that an open-ended request for "additional documents" cannot be used to walk away from a signed deal at the last minute.

Frequently Asked Questions

Does seller financing have to follow federal lending rules?
It can, and this is the part most private sellers miss. The federal Dodd-Frank Act and its mortgage rules, along with the SAFE Act, apply to seller financing on residential property in ways that depend on how many properties you finance and over what period, and they include an ability-to-repay requirement, meaning you generally must make a reasonable, good-faith determination that the buyer can actually make the payments. There are narrow exclusions for sellers who finance only a small number of transactions, and sellers who do this repeatedly may need to work with or be licensed as a mortgage loan originator. Balloon payments and adjustable rates are also treated differently on owner-occupied residential loans than on investment or commercial property. Because the analysis turns on facts like occupancy, property count, and timing, consult a licensed attorney experienced in residential lending before you carry a note.
What is the difference between a promissory note and a deed of trust?
The promissory note is the debt itself: it is the buyer written promise to repay a specific amount at a specific rate on a specific schedule, and it is what the seller sues on if payments stop. The deed of trust, or a mortgage in states that use them, is the security instrument that pledges the property as collateral for that promise. The note alone gives the seller a claim against a person; the recorded security instrument gives the seller a claim against the property, with a priority position other creditors have to respect. Both are executed at closing, and only the security instrument gets recorded in the county records.
What happens if the buyer misses payments on a seller-financed loan?
After the notice and cure period in the addendum and the security instrument, the seller can accelerate the loan, meaning the entire remaining balance becomes due at once, and then enforce the lien through foreclosure. Whether that foreclosure is judicial or non-judicial, and how long it takes, is governed by the law of the state where the property sits rather than by the contract. During that process the seller may also advance money for taxes or insurance to protect the collateral and add those advances to the balance. Sellers should plan for the possibility that a foreclosure takes months and costs real money in legal and title fees.
Can a seller carry financing when there is still a mortgage on the property?
Sometimes, but it is risky and needs professional help. Most institutional mortgages contain a due-on-sale clause, which lets the existing lender call the entire loan due when the property is sold, and selling with seller financing is a sale. Wrap-around structures where the seller keeps making payments on the underlying loan exist, but they leave the buyer exposed if the seller stops paying and the senior lender forecloses. If there is any existing loan, disclose it in the exhibit, tell the title company, and have an attorney review the structure before closing.
What interest rate should a seller charge on owner financing?
The rate is negotiable and usually lands somewhere above prevailing mortgage rates, because the seller is taking on risk a bank would not. Two limits matter, though. State usury laws cap the maximum rate you can legally charge, and exceeding that cap can cost the seller some or all of the interest. Federal tax rules also set minimum applicable rates for seller-carried notes, and charging too little can cause interest to be imputed for tax purposes. Talk to a tax advisor and an attorney before settling on a number, and write the rate into the note rather than leaving it to be agreed later.

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