A seller financing business contract is not a single document but a coordinated set: a purchase agreement, a promissory note, a security agreement, and usually a personal guarantee. Together they fix the price and payment schedule, define what counts as default and what the seller can do about it, pledge specific business assets as collateral, and set out the tax reporting both sides owe the IRS. A gap in any one of them can leave either party exposed. Down payments typically run 10% to 30% of the purchase price, with the seller carrying the balance over five to ten years.
The Money Terms
Every seller-financed deal starts with five numbers: the purchase price, the down payment, the interest rate, the payment schedule, and the maturity date. Each has to be written down precisely, because errors here compound over the life of the loan.
Purchase Price and Down Payment
State the total purchase price and the exact down payment amount. On a $500,000 sale, a buyer might put down anywhere from $50,000 to $150,000 and finance the rest with the seller. A larger down payment reduces the seller’s risk and often earns the buyer a lower rate; a smaller one leaves the buyer more working capital. The agreement should say when the down payment is due and whether it is refundable under any circumstances.
Interest Rate and the AFR Floor
The contract must state the interest rate and whether it compounds annually, monthly, or not at all. Most states impose no cap on commercial loan interest, though a handful still set ceilings in the range of roughly 12% to 18%. The more practical constraint is the IRS Applicable Federal Rate. If the stated rate is below the AFR, the IRS recharacterizes part of each principal payment as interest income to the seller and an interest deduction for the buyer, regardless of what the contract says.1Office of the Law Revision Counsel. 26 U.S. Code 1274 – Determination of Issue Price in the Case of Certain Debt Instruments Issued for Property As of late 2025, the long-term AFR for annual compounding sits around 4.55% and the mid-term rate around 3.79%.2Internal Revenue Service. Revenue Ruling 25-24, Applicable Federal Rates Setting the contract rate at or above the applicable AFR avoids the recharacterization.
Amortization and Balloon Payments
The amortization schedule determines how each payment splits between principal and interest. Most seller-financed business deals amortize over five to ten years, and the contract may call for a balloon payment well before the amortization period ends. In a $500,000 deal with a five-year balloon, the buyer might make monthly payments calculated on a ten-year amortization and then owe the full remaining balance at the end of year five. Spell out the exact balloon amount or the formula for calculating it, and say what happens if the buyer cannot refinance by that date.
Prepayment
Sellers counting on interest income sometimes negotiate a prepayment penalty to discourage early payoff. The contract should state whether prepayment is allowed and, if a penalty applies, how it is calculated. A common structure is a percentage of the outstanding balance that steps down each year. Buyers have reason to resist penalties that extend beyond the first two or three years, since those can make later refinancing prohibitively expensive.
Default and Seller Remedies
The default provisions are the teeth of the contract. They define what counts as a breach, what the seller can do about it, and how long the buyer has to fix the problem.
Default Triggers and Cure Periods
List every event that qualifies as a default. Common triggers include missing a payment, failing to maintain insurance on collateral, filing for bankruptcy, or breaching a representation or warranty. For payment defaults, include a cure period, typically 10 to 30 days, during which the buyer can make the missed payment without further consequences. Distinguishing between minor defaults that can be cured and material defaults that cannot gives both sides clearer expectations.
Acceleration
An acceleration clause lets the seller demand the full remaining balance immediately after an uncured default. Without one, the seller can only chase each installment as it comes due. The clause should require the seller to send written notice of the default and let the cure period expire before accelerating. Courts in many jurisdictions refuse to enforce acceleration when the lender skipped the notice procedure in the agreement, so the language has to track what the parties intend to do in practice.
Late Fees
A late fee, often 3% to 5% of the overdue payment, gives the buyer a financial reason to pay on time. Say what the percentage is, when it kicks in (usually after a grace period of 10 to 15 days), and whether it applies to each missed payment or only the first. Courts occasionally strike down late fees they consider excessive, so the amount should bear some reasonable relationship to the seller’s actual cost of handling a late payment.
Due-on-Sale
A due-on-sale clause requires the buyer to pay off the full balance if they sell, transfer, or otherwise dispose of the business before the note is paid. It stops the buyer from quietly handing the debt to a third party the seller never agreed to finance. Specify whether the clause reaches partial transfers, such as bringing in a new partner who takes a controlling interest.
Collateral and the Seller’s Security Position
A seller’s loan is only as good as what they can take back if the buyer stops paying. The security agreement gives the seller a legal claim to specific assets, and a personal guarantee extends that claim beyond the business itself.
The Security Agreement
A separate security agreement grants the seller a security interest in the business assets pledged as collateral. These typically include equipment, inventory, accounts receivable, and intangibles like trademarks, customer lists, and intellectual property. Describe the collateral in enough detail that there is no ambiguity about what the seller can seize after a default: serial numbers and descriptions for equipment, registration numbers and clear identification for intangibles. The description can also use a blanket lien covering all present and future assets of the business, mirroring the approach used in institutional lending.3U.S. Securities and Exchange Commission. All Assets Security Agreement If the collateral is worth significantly less than the outstanding balance, the seller is effectively unsecured for the difference.
Personal Guarantee
A personal guarantee makes the buyer individually liable, not just the business entity. If the business fails and the collateral falls short, the seller can pursue the buyer’s personal assets for the gap. Guarantees come in two forms: unlimited, which exposes everything the guarantor owns, and limited, which caps personal liability at a specific dollar amount. Buyers push for limited guarantees; sellers prefer unlimited ones. Either way, the guarantee should be a standalone document signed by the individual guarantor, not a clause buried in the purchase agreement.
Insurance on Collateral
The buyer should be required to maintain insurance on all collateralized assets, with the seller named as loss payee. If equipment burns or inventory is stolen, the payout flows to the seller first, up to the outstanding balance. The contract should set minimum coverage amounts and require annual proof of insurance. Letting this slide is one of the most common seller mistakes, and by the time a loss happens it is too late to fix.
Asset Purchase vs. Stock Purchase
The deal structure changes what the seller can take as collateral. In an asset purchase, the buyer acquires specific equipment, inventory, contracts, and intellectual property, and the seller’s security interest attaches to those identified assets. In a stock or membership interest purchase, the buyer acquires the entity itself, and the collateral is the equity interest rather than the underlying assets. That distinction matters because a stock purchase means the buyer inherits all of the entity’s liabilities, known and unknown, which can quietly erode the value of the seller’s collateral if hidden debts surface after closing.
Subordination to a Bank
If the buyer also takes a bank loan, the bank will almost certainly require a subordination agreement pushing the seller behind it. The seller gets paid only after the senior lender is made whole, which changes the risk profile considerably. A seller agreeing to subordinate has reason to ask for a larger down payment, a higher interest rate, or a personal guarantee in exchange.
Non-Compete and Transition
Almost no buyer will close without a non-compete from the seller. The contract should restrict the seller from starting or joining a competing business for a defined period, typically three to five years, within a geographic area that matches the market the business serves. A non-compete tied to the sale of a business is enforceable in all 50 states, though courts in every jurisdiction apply a reasonableness test to the duration, geographic scope, and the activities restricted. Also address whether the seller’s spouse is bound, whether the restriction transfers if the buyer later resells, and whether the non-compete dissolves if the buyer defaults on the financing.
Buyers often negotiate for a transition period where the seller stays on to introduce key customers, train staff, and transfer operational knowledge. These arrangements typically last three to twelve months. Document them in a separate consulting or transition agreement that specifies hours per week, compensation (if any), and a clear end date. Leaving transition expectations vague is a reliable source of post-closing conflict.
Seller Representations and Indemnification
The purchase agreement should include representations and warranties from the seller covering the condition and legal status of the business. At minimum, the seller should represent that they hold clear title to all assets being sold, free of liens or encumbrances not disclosed in the agreement; that all tax returns have been filed and taxes paid; that there is no pending or threatened litigation; and that the financial statements provided to the buyer are accurate. These give the buyer a contractual claim for damages if any representation turns out to be false, which matters because many problems with a business do not surface until months after closing.
Set a survival period for the representations, usually 12 to 24 months after closing, and an indemnification mechanism allowing the buyer to recover losses caused by a breach. Some agreements let the buyer offset indemnification claims against the remaining payments owed to the seller, which creates real leverage without requiring a separate lawsuit.
Tax Reporting Both Sides Have to Handle
Seller financing triggers specific tax obligations that the contract should address directly rather than leave for the accountants to discover later.
Installment Sale Reporting
The seller reports the gain over the years payments are received, rather than all at once, using IRS Form 6252.4Internal Revenue Service. About Form 6252, Installment Sale Income Each payment splits into three components: return of the seller’s basis (not taxed), capital gain, and interest income. The seller calculates a gross profit percentage by dividing total gain by the contract price, then applies that percentage to each year’s payments to determine the taxable portion.5Internal Revenue Service. Publication 537, Installment Sales Interest received is reported separately as ordinary income on Schedule B, not on Form 6252.
Depreciation Recapture Hits in Year One
This is where sellers get surprised. Depreciation recapture must be reported as ordinary income in the year of the sale, even if the buyer has not yet made a payment beyond the down payment.6Internal Revenue Service. Topic No. 705, Installment Sales If the seller claimed significant depreciation on equipment or other assets over the years, that recapture can create a substantial tax bill in year one that the down payment alone may not cover. Plan for it with an accountant before closing.
Purchase Price Allocation on Form 8594
Both the buyer and seller must file IRS Form 8594, which allocates the total purchase price across seven classes of assets using a residual method.7Internal Revenue Service. Instructions for Form 8594, Asset Acquisition Statement Under Section 1060 The allocation determines the buyer’s depreciable basis in each asset and the character of the seller’s gain. Money allocated to inventory generates ordinary income for the seller, while money allocated to goodwill generates capital gains taxed at lower rates. The buyer prefers allocating more to depreciable equipment and amortizable intangibles because those create future deductions. These competing interests make the allocation one of the most heavily negotiated parts of a business sale, and both parties must agree on it in the purchase agreement. The IRS can challenge an allocation it considers unreasonable.
Executing, Filing, and Keeping the Lien Alive
Signing is not the finish line. The seller’s security interest only becomes enforceable against other creditors after it is filed, and the filing has to be maintained.
Notarization
Having all parties sign in front of a notary verifies identities and makes the documents harder to challenge later. It is not legally required for every type of business contract, but the cost is modest.
Filing the UCC-1
The seller must file a UCC-1 Financing Statement with the appropriate state filing office to perfect the security interest in the collateral. The filing puts other creditors on public notice of the seller’s priority claim on the business assets. Skip it, and the seller can lose the collateral entirely if the buyer takes on additional debt or files for bankruptcy.
Continuation Before the Five-Year Mark
A UCC-1 is effective for five years from the date of filing. If the loan runs longer, the seller must file a continuation statement within the six months before the five-year period expires to keep the filing alive for another five years.8Legal Information Institute. UCC 9-515 – Duration and Effectiveness of Financing Statement Missing that window means starting over with a new UCC-1, and in the gap other creditors can leapfrog the seller’s claim. Calendar the renewal date the day the original filing is made.
Termination After Payoff
Once the buyer pays the loan in full, the seller is obligated to file a UCC-3 termination statement releasing the security interest. For business collateral, the seller must file or send the termination statement within 20 days of receiving a written demand from the buyer.9Legal Information Institute. UCC 9-513 – Termination Statement Failing to release the lien on time can block the buyer from obtaining future financing and may expose the seller to liability.