Most buyers hear “seller financing” and think the seller is doing them a favor. A generous owner holding paper so the deal can close. Nice story.
That framing will cost you money.
A seller financing agreement is a legal instrument with real teeth on both sides. The terms you agree to now determine whether this acquisition builds wealth or bleeds you dry over a decade. And the difference between a good seller note and a bad one is not subtle. It shows up in your bank account every single month.
Here is what you actually need to understand before you sign anything.
What a Seller Financing Agreement Actually Is
A seller financing agreement is a formal contract where the business seller agrees to accept a portion of the purchase price as deferred payments over time, rather than collecting everything at closing. Instead of borrowing that portion from a bank, the buyer borrows it directly from the seller.
The seller becomes a creditor. The buyer becomes a debtor. There is a promissory note spelling out the principal balance, interest rate, repayment term, and what happens if the buyer defaults. Not a handshake. A binding legal obligation.
In SBA 7(a) acquisitions (which is how most deals in the $500K to $5M range get financed), the seller note plays a specific structural role. It sits behind the SBA loan in priority, meaning if the business fails and assets get liquidated, the SBA lender gets paid first. The seller is last in line. That matters more than most buyers realize, because it shapes everything about how the note gets negotiated.
How Seller Notes Fit Into SBA Deals
On a standard SBA 7(a) acquisition, the capital stack typically looks like this:
- SBA loan: 80% to 90% of the purchase price
- Buyer equity injection: 10% minimum
- Seller note: fills the gap between the two, when needed
The seller note is not always required. But when the SBA requires a larger equity injection than the buyer can cover in cash, or when the deal needs structural flexibility to get both sides to agree on price, the seller note closes the difference.
On 90% or more of the deals we close, we negotiate the seller note to a 10-year full standby, 0% interest structure. Zero payments during the standby period. Zero interest accruing. Zero additional cash outflows on that portion of the purchase price until the SBA note is retired.
That structure matters enormously for cash flow. A seller note carrying a 6% interest rate with monthly payments materially changes your debt service coverage ratio. A standby note at 0% does not touch it. The math is the math.
What Kills Seller Notes Late in Deals
Worth understanding before you get too deep into any deal: even when both sides agree in principle, seller notes blow up late. We have watched this happen enough times to know the patterns.
Seller gets cold feet on standby terms. They agree to a full standby note, spend two months in diligence, then consult a financial advisor who tells them 10 years at 0% is a terrible deal. This is exactly why getting seller note terms locked in the LOI matters. Surface it early or pay for it later.
SBA lender pushes back on the structure. Some lenders have very specific requirements around how seller notes get documented, how they interact with equity injection calculations, and what disclosures they need. Work with a lender who has done SBA acquisition financing before. Not a generalist community bank doing their first deal.
Note terms conflict with SBA regulations. The SBA has specific rules governing seller notes used in conjunction with SBA loans (interest rate limits during standby, documentation requirements, subordination language). All of it has to be correct. Your attorney should draft or review the promissory note. This is not a document to pull from a template you found online.
Personal guarantee disputes. Less common, but worth watching for in the final documents: some sellers try to negotiate for collateral beyond the personal guarantee, including a lien on the buyer’s personal real estate.
The Key Terms Inside a Seller Financing Agreement
Not all seller notes are the same. Here are the variables you need to control, and the benchmarks that matter.
Principal amount. The face value of the note. This is the deferred portion of the purchase price. On a $1.5M deal with 80% SBA financing and 10% equity, the seller note might cover the remaining 10%, or $150K.
Interest rate. Can range from 0% to 8% or more. The SBA has specific rules about seller note interest rates when the note is on standby during the loan term (the SBA Standard Operating Procedures spell these out, and your lender should know them cold). In most cases, 0% is achievable and should be your target. Always.
Term. How long the seller waits to get repaid. On a full standby note tied to an SBA deal, the term typically matches or exceeds the SBA loan term. Often 10 years.
Standby provisions. This is the critical term. A full standby note means the seller receives no principal or interest payments for the entire standby period. A partial standby allows some interest payments. Full standby is better for the buyer’s cash flow and more favorable from an SBA underwriting standpoint. We push for full standby on every single deal.
Subordination. The seller note must be subordinated to the SBA loan. The SBA requires this. It is not your ask. It is the bank’s requirement. That framing removes it from the negotiation table entirely.
Default terms. What triggers a default on the seller note. Typically includes missing payments (after standby ends), breaching the SBA loan covenants, or filing for bankruptcy. Know exactly what is in here before signing.
Personal guarantee. The seller will almost certainly require the buyer to personally guarantee the note. Standard. The same guarantee you gave the SBA lender extends to the seller.
So that covers the structural side. The operational side of actually getting these terms is a different conversation.
How Lenders View the Seller Financing Agreement
SBA lenders scrutinize seller notes carefully. This is not paperwork they skim over.
The lender wants to confirm the seller note is on full standby. They want to see whether the seller note injection counts toward equity if structured correctly. And they want to know the total debt service the business needs to cover.
This is where your debt service coverage ratio (DSCR) becomes the governing number. We target a 2x DSCR on acquisitions, with a floor of 1.5x when clear synergies are in play.
Here is where buyers need to be careful. Say you are looking at a $1.2M landscaping services company with $300K in listed seller discretionary earnings. SDE is a broker-friendly number. It is not the same as real cash flow. We discount SDE by 15% to 50% to approximate what the buyer will actually take home after factoring in a market-rate operator salary and normalizing the financials. So that $300K SDE might look more like $200K to $225K in adjusted cash flow once you do the work.
At 80% SBA financing over 10 years, your annual SBA debt service runs roughly $130K. At 2x DSCR, you need $260K in real earnings (not SDE, actual cash flow) to support that. If the real number is $200K to $225K, this deal is already tight. And if the seller note carries a 6% interest rate and requires payments on top of that, you have just added another $9K to $12K per year in cash outflows. Coverage gets uncomfortable fast.
A 0% standby note adds nothing to annual debt service. That is why we fight for it on every deal. It is not a nice-to-have. It is the difference between a deal that works and one that slowly suffocates.
Negotiating the Seller Financing Agreement
Sellers do not love standby notes. Accepting deferred payment at 0% interest, subordinated to a bank, for 10 years is a genuine concession. Understanding why sellers agree to this (and how to position the conversation) is the key to getting the structure you need.
Sellers accept standby notes because the alternative is often no deal. A buyer who cannot get to 10% equity any other way will walk. A deal that does not clear SBA underwriting will not close. The seller’s real choice is between a standby note and starting over with a new buyer. From what we have seen, most sellers come around when the math is laid out plainly.
Frame it as deal certainty. Sellers hate re-listing. They hate nine more months of tire-kickers. A clean deal with SBA financing and a properly structured seller note closes. Position the standby note as the mechanism that makes their deal close on a defined timeline.
Start the negotiation early. Do not surface seller note terms at the LOI stage and then surprise the seller with “full standby, 0% interest” three months later. Include the basic seller note terms in the LOI itself. No late-stage blowups.
Use the subordination requirement as a given. The SBA requires it. That is not you negotiating against the seller. That is the lender’s standard terms, passed along.
Frequently Asked Questions
What is a seller financing agreement in a business acquisition?
A seller financing agreement is a contract where the business seller accepts deferred payments for part of the purchase price instead of receiving everything at closing. The buyer signs a promissory note to the seller outlining the loan amount, interest rate, term, and repayment conditions. It functions like a loan from the seller to the buyer, subordinated to any senior lender like an SBA 7(a) lender.
Can a seller note count toward my SBA equity injection?
In some cases, yes. If the seller note is structured correctly, specifically as a full standby note subordinated to the SBA loan, the SBA may allow it to count as part of the 10% equity injection requirement. This is lender-specific and depends on how the deal is structured. Confirm this treatment with an experienced SBA lender before assuming it applies.
What interest rate should I negotiate on a seller financing agreement?
Target 0%. On SBA acquisitions with a full standby seller note, 0% interest is achievable and appropriate. The seller collects no payments during the standby period and receives no interest. This protects the buyer’s cash flow and keeps debt service coverage ratios clean. Any interest rate above 0% should come with an offsetting reduction in purchase price or note principal.
How long does a seller note typically last?
For SBA acquisitions, the seller note term usually matches the SBA loan term, often 10 years. On a full standby structure, the seller receives no payments for this entire period. After the SBA loan is paid off, the seller note typically converts to an active repayment obligation. Confirm your specific term and conversion mechanics with your attorney before signing.
What happens if I default on a seller financing agreement?
Default triggers vary by agreement but typically include missed payments, breach of the senior SBA loan covenants, or insolvency. On a standby note during the SBA period, there are no required payments, so payment default is less common during that window. After standby ends, missed payments can trigger default, giving the seller legal remedies including judgment and collection against the personal guarantee. Read the default provisions carefully.
Ready to Structure a Deal That Actually Closes?
Seller financing agreements are one of the most powerful tools in a business acquisition. But only when they are negotiated correctly and documented properly.
Regalis Capital advises buyers through every step of this process: deal sourcing, offer structure, seller note negotiation, SBA financing, and close. We have negotiated full standby, 0% interest seller notes on the vast majority of our deals, and we know exactly where these negotiations go sideways.
If you are working toward a business acquisition and want a team that does this every day, start here.