Installment Sales and Seller Financing

An installment sale is any disposition where at least one payment is received after the close of the taxable year in which the sale occurs. Under IRC §453, the seller reports a proportionate share of the gain with each payment received. The gross profit ratio — total gain divided by total contract price — determines the taxable portion of each payment. For example, if a property is sold for $2 million with a $600,000 basis (gain of $1.4 million), the gross profit ratio is 70%, meaning $0.70 of every dollar received is taxable gain.

Installment sales cannot be used for inventory or dealer property, publicly traded securities, or property sold at a loss. Depreciation recapture under IRC §§1245 and 1250 must be recognized in the year of sale regardless of the installment method — it cannot be deferred. This means the seller may owe significant tax in the first year even if cash received is minimal. For a property with $500,000 in accumulated depreciation, the recapture tax (25% maximum for real property) of $125,000 is due in Year 1.

The interest component of installment payments is reported separately as ordinary income. IRC §1274 and §483 impose minimum interest rate requirements (the Applicable Federal Rate, or AFR) to prevent disguised below-market sales. As of late 2024, mid-term AFRs (obligations of 3-9 years) were approximately 4.0-4.5%. Seller financing at rates below the AFR triggers imputed interest, potentially creating phantom income.

Seller financing makes the seller the lender, accepting a promissory note for a portion of the purchase price secured by the business or property. This structure benefits both parties: the seller earns interest income and defers capital gains; the buyer obtains financing that might be unavailable or more expensive from traditional sources. The SBA reports that seller financing is present in approximately 75-90% of small business transactions, typically funding 30-60% of the purchase price.

Seller financing terms should be structured with attention to security, interest rate, amortization, maturity, and default remedies. Security typically includes a first or second lien on the assets sold, personal guarantees of the buyer, and UCC filings on business assets. The interest rate should equal or exceed the AFR to avoid imputed interest issues, and it should reflect market rates plus the additional risk of the transaction. A reasonable range for seller financing is 1-3% above the prevailing SBA loan rate.

The amortization schedule affects both parties' cash flow. Fully amortizing notes provide predictable income to the seller and systematic debt reduction for the buyer. Interest-only notes with balloon payments maximize the buyer's initial cash flow but create refinancing risk at maturity. A common compromise is a 7-10 year amortization with a 3-5 year balloon, giving the buyer time to stabilize operations before refinancing.

The primary risk in seller financing is buyer default. If the buyer fails to make payments, the seller must enforce remedies through foreclosure, repossession, or litigation — an expensive and time-consuming process. Risk mitigation strategies include: substantial down payment (minimum 20-30%), personal guarantees from the buyer and their spouse, life and disability insurance on the buyer naming the seller as beneficiary, financial reporting covenants (quarterly or annual financials), and acceleration clauses triggered by material adverse events.

The installment sale also carries tax risk. If the note is subsequently sold, exchanged, or otherwise disposed of, the remaining deferred gain accelerates and becomes immediately taxable. This includes involuntary dispositions such as the buyer's bankruptcy, which can trigger gain recognition even though the seller has received no cash. The related-party rules under IRC §453(e) impose additional restrictions: if the buyer is a related party and disposes of the property within two years, the seller's deferred gain is accelerated.

Despite these risks, seller financing remains one of the most powerful tools in exit planning. The ability to spread gain recognition over multiple years, earn market-rate interest income, and facilitate a sale that might not otherwise close makes installment sales indispensable for real estate exits. The key is proper structuring with qualified legal and tax counsel.