Seller Financing Explained — How to Structure a Deal Without a Bank

What a Seller Note Actually Is

A seller note (also called a seller carryback) is a legally binding promissory note from the buyer to the seller. It has a principal amount (the deferred portion of the purchase price), an interest rate, a term (typically 3–7 years), and a payment schedule (usually monthly amortizing payments, though balloon structures also exist).

The seller note is secured by the assets being purchased — and in some deals, by a personal guarantee from the buyer. If the buyer defaults, the seller can foreclose on the collateral. This security makes a seller note meaningfully different from a gift or a handshake deal.

In SBA-financed acquisitions, seller notes must go on full standby for the first 24 months after close — meaning no principal or interest payments during that period. This is actually advantageous for buyers because it reduces early cash flow pressure, but sellers who do not understand this provision often resist it until it is explained clearly.

Typical Seller Note Terms

Seller notes in small business acquisitions typically carry the following terms, though everything is negotiable.

• Principal: 10–25% of purchase price. Rarely more than 30% unless the buyer has no institutional financing
• Interest rate: 5–8% per annum. Sellers are not banks — a market-rate seller note should reflect the risk of subordinated debt
• Term: 3–7 years, most commonly 5 years. Longer terms mean lower monthly payments but more total interest paid
• Amortization: Fully amortizing monthly payments are most common. Balloon structures (interest-only with principal at maturity) exist but are riskier for sellers
• Security: First or second lien on business assets, sometimes a personal guarantee from the buyer
• Standby provisions: If an SBA loan is involved, seller notes are typically on standby for 24 months per SBA rules

Why Sellers Accept Seller Financing

The obvious question is why a seller would extend credit to a buyer at a below-market rate rather than demanding all cash at close. The answer is that seller financing often enables a higher total purchase price.

A buyer who can get 80% SBA financing and asks for 10% seller financing can typically afford to pay more than a buyer who requires 100% outside financing — because the seller note reduces the buyer's financing hurdle. In markets where SBA-eligible buyers are the primary buyer pool, offering seller financing is often the difference between a clean offer at asking price and a below-market all-cash offer.

Seller financing also offers tax benefits through the installment sale method. By receiving payments over time rather than all at close, some sellers can reduce their capital gains tax burden in high-income years. Sellers should consult a CPA about the installment sale implications before agreeing to any seller note structure.

How to Negotiate Seller Financing

Seller financing negotiation happens in two phases: the LOI phase (where you establish the high-level structure) and the purchase agreement phase (where specific terms are documented).

In the LOI, state the seller note as a percentage of purchase price, the intended term, and a reference rate (e.g., "5-year seller note at 6% annual interest, fully amortizing"). Do not get into the weeds of security provisions or acceleration clauses in the LOI — save those for the purchase agreement.

In the purchase agreement phase, negotiate: (1) the subordination agreement if SBA financing is involved, (2) acceleration triggers (what events allow the seller to accelerate the full note balance), (3) personal guarantee requirements, and (4) whether the note is assumable if you later sell the business. Buyers generally want fewer acceleration triggers and no personal guarantee where possible. Sellers generally want the opposite.

When Seller Financing Is a Red Flag

Seller financing is not always a positive signal. There are specific situations where a seller's willingness to carry a large note should raise your diligence intensity.

If the seller is offering to carry 40–50% or more of the purchase price without SBA involvement, ask why. Large seller notes sometimes indicate that the business cannot qualify for institutional financing — because the cash flows are too weak, the industry is excluded from SBA eligibility, or the business has a compliance or legal issue that prevents bank underwriting.

If the seller is pushing hard for seller financing while resisting your request to see tax returns, be cautious. Seller financing does not make the underlying business any more profitable. A seller note on an overpriced business is still an overpriced deal — you are just paying for it more slowly.

Building a Blended Deal Structure

Most acquisition deals in the lower middle market use a blended structure: institutional financing (SBA or conventional) for the majority, buyer equity for 10–20%, and a seller note for the balance. The optimal blend depends on the business's EBITDA, the purchase price, and your available capital.

A typical blended structure for a $2M purchase price with $400K adjusted EBITDA might look like: SBA 7(a) loan of $1.6M (80%), buyer equity of $200K (10%), seller note of $200K (10%) on 5-year standby per SBA rules. Annual debt service on the SBA loan at 10.5% over 10 years is approximately $260K. DSCR of $400K / $260K = 1.54x — well above the 1.25x minimum.

See how deal structures vary by industry in the deal structure guides for septic services and urgent care clinics, and use the Deal Structure Builder to model your specific deal in real time.