Seller Note as Down Payment: How the SBA 7(a) 10% Equity Injection Works

A seller note can stand in for part of an SBA 7(a) down payment, but only part, and only on one condition. Under SBA SOP 50 10 8, a buyer of a business must put in at least 10% of total project costs as equity (effective June 1, 2025). A seller note counts toward that 10% only if it is on full standby — no principal or interest payments — for the life of the SBA loan, and only for up to 50% of the required injection.

This guide runs one $500,000 purchase through four financing structures so you can see where the line falls. The arithmetic below comes from the same engine as the SBA 7(a) Deal Affordability Calculator.

The two rules, stated plainly

Rule	What it says	Source
Minimum equity injection	At least 10% of total project costs for a complete change of ownership	SBA SOP 50 10 8
Standby seller note	Counts toward the injection only if on full standby for the life of the SBA loan, and for no more than 50% of the required injection	SBA SOP 50 10 8
Minimum DSCR	1.25 for an Initial Acquisition at any loan size (SOP 50 10 8.1, Appendix 15, effective October 1, 2026)	SBA SOP 50 10 8.1

Two consequences follow from the first two rows. On a project with total costs of $500,000, the required injection is $50,000, so a standby note can cover at most $25,000 of it. The other $25,000 has to be the buyer's cash.

The assumptions behind the worked example

Every figure below depends on inputs that are assumptions, not data about any real deal. Each is editable in the calculator.

• Purchase price: $500,000, with no working capital or closing costs financed into the project, so total project costs are $500,000.
• Business earnings (SDE): $150,000, the IBBA-method earnings figure for one owner.
• Owner draw: $60,000, what the buyer needs to live on. Cash flow available for debt service is $150,000 − $60,000 = $90,000.
• SBA loan rate: 10.00%. This is a WSJ Prime default of 7.00% (as of September 2026, per Bankrate) plus 3.0%, which is the maximum spread for loans over $350,000 under 13 CFR 120.215. Assuming a lender charges the maximum is a simplification; the cap is a ceiling, not a quote.
• SBA loan term: 10 years, fully amortizing, with monthly payments.
• Seller note terms where payments apply: 6% over 10 years. This is an illustrative assumption; seller-note rates are negotiated.
• Standby notes: modeled with no payments, because the rule requires none for the life of the SBA loan. How a particular lender treats a standby note in its own underwriting is the lender's call.

At these assumptions, $90,000 of cash flow supports at most $90,000 ÷ 1.25 = $72,000 of annual debt service at the 1.25 floor.

Four structures, one price

	A. All cash down	B. Half cash, half standby note	C. Note replaces the cash	D. Half cash, half paying note
Buyer cash	$50,000	$25,000	$0	$25,000
Seller note	none	$25,000 (standby)	$100,000 (standby)	$25,000 (paying)
SBA loan	$450,000	$450,000	$400,000	$450,000
Counted toward the 10%	$50,000	$25,000 cash + $25,000 note = $50,000	$0 cash + $25,000 note (capped) = $25,000	$25,000 cash + $0 note = $25,000
Meets the $50,000 requirement?	Yes	Yes	No	No
Annual debt service	$71,361	$71,361	$63,432	$74,692
DSCR ($90,000 ÷ debt service)	1.26	1.26	1.42	1.20
Meets the 1.25 floor?	Yes	Yes	Yes	No

Structure B: the standby note does its job

The SBA loan is $500,000 − $25,000 − $25,000 = $450,000 in both A and B. The standby note does not shrink the SBA loan here; it substitutes for $25,000 of the buyer's cash. The monthly payment on $450,000 at 10% over 10 years is $5,946.78, or $71,361 a year, so DSCR is 1.26 either way. Both structures clear the 1.25 floor with a thin margin: $90,000 against the $72,000 limit leaves $639 of annual room.

Structure C: a strong DSCR does not rescue the equity test

Rolling $100,000 into a standby note drops the SBA loan to $400,000 and the annual payment to $63,432, so DSCR rises to 1.42. But the note counts for only $25,000 (half of the $50,000 required injection), and the buyer put in no cash. The deal passes the cash-flow test and fails the equity test. The two tests are independent; passing one says nothing about the other.

Structure D: a paying note counts for nothing

Here the $25,000 note pays 6% over 10 years, $277.55 a month. It adds $3,331 a year of debt service, taking the total to $74,692 and DSCR to 1.20, below the 1.25 floor. And because the note is not on standby, it contributes $0 toward the 10%, leaving $25,000 counted against $50,000 required. Same price, same SDE, two failures.

What the standby note costs the seller

Everything above is the buyer's side. A standby note means the seller receives no payments on that portion for as long as the SBA loan is outstanding. In structure B, with a 10-year SBA term, that is $25,000 deferred for up to a decade. The seller's side of that trade is covered in The Hidden Cost of Seller Financing.

Limits of this example

• It uses a $500,000 purchase with no financed closing costs or working capital. Those raise total project costs and therefore the required injection.
• It uses the maximum rate spread and a single illustrative SDE and owner draw.
• A lender applies its own underwriting beyond the SBA minimums. This is a starting calculation, not a loan decision and not a formal appraisal.

This guide is informational only and is not financial, legal, or tax advice. It computes figures from stated assumptions; it does not recommend a deal structure.

Last reviewed: October 2026

Frequently asked questions

Can a seller note count toward the SBA equity injection?

Yes, but only if it is on full standby, with no principal or interest payments, for the life of the SBA loan. Even then it can cover no more than 50% of the required injection. On a $500,000 project, that is at most $25,000 of the $50,000 required.

Does a standby seller note lower the SBA loan amount?

Not by itself. In the worked example, a $25,000 standby note replacing $25,000 of cash leaves the SBA loan at $450,000. A note lowers the loan only when it is added on top of the required injection, as in structure C, where the loan falls to $400,000 but the equity test fails.

What DSCR does the SBA require for a business acquisition?

SOP 50 10 8.1, Appendix 15 sets the minimum at 1.25 for an Initial Acquisition at any loan size, effective October 1, 2026. No reduced standard applies solely because the loan is a 7(a) Small or SBA Express loan.

Why does a paying seller note hurt a deal in this example?

It adds to annual debt service and earns no equity credit. In structure D, a $25,000 note at 6% over 10 years adds about $3,331 a year and moves DSCR from 1.26 to 1.20.

This guide is for informational purposes only. It is not financial, legal, or business-brokerage advice, and it is not a formal valuation or appraisal. What a business actually sells for is set by a specific buyer, a specific lender, and a specific deal — no article or calculator can know that in advance, and we say so instead of pretending otherwise.

Last reviewed: October 2026 · Against primary sources cited in the body.