Seller Financing for a Business: How SBA Rules Work

Seller financing for a business is the seller taking a promissory note for part of the purchase price instead of collecting all of it at closing. In an SBA-backed acquisition, that note is the piece most likely to be structured wrong. The rules governing it changed in June 2025, and they change again on October 1, 2026. What the note does for your down payment depends entirely on how it is written.

What is seller financing for a business?

The note is a separate instrument from the purchase agreement. It states a principal amount, an interest rate, a payment schedule, a maturity date, and what happens on default. In a financed deal a second document sits on top of it. The standby agreement between the seller and the bank restricts payments, enforcement, and lien rights while the senior loan is outstanding.

Who uses seller financing

• First-time buyers of an operating business. The most common case. The buyer has enough cash for part of the equity requirement and needs the seller to carry the rest.
• Buyers of businesses that appraise below the asking price. A note bridges the gap between what the seller wants and what a lender will fund against a valuation.
• Sellers who want a higher headline price. Carrying paper is a bargaining chip, and it usually buys a better number.
• Sellers with tax reasons to spread the gain. Payments spread across more than one tax year may qualify as an installment sale under IRS Publication 537, which lets eligible gain be reported as payments arrive. Inventory and depreciation recapture generally cannot be deferred that way. A tax preparer should size this before the note is signed.
• Buyers who want the seller invested in a clean handoff. A seller still owed money has a reason to make the transition work.

That last point is where buyer and seller expectations diverge most sharply in the current market.

The same report notes that almost half of sellers say they will not provide seller financing at all, with another 23 percent undecided. Brokers surveyed for the prior quarter tied that hesitancy directly to the SBA's tightened standby terms.

What a seller note includes

Six terms decide whether a note works for both sides.

• Principal. The financed portion of the price. Broker and deal-data sources typically put seller notes somewhere in the low-to-mid teens as a share of purchase price, and the range moves a lot with deal size and industry.
• Interest rate. Negotiated between the parties. Rates below the applicable federal rate published by the IRS can trigger imputed-interest treatment.
• Term and amortization. Commonly quoted at five to seven years, sometimes with a balloon. Both get overridden when SBA standby rules apply.
• Standby or deferral period. The window during which the buyer makes no payments. This is the term that determines the note's SBA treatment.
• Security. Whether the note is secured by business assets, and where that lien sits relative to the bank's.
• Default remedies. Acceleration, collection, and foreclosure rights. Under a standby agreement the seller may take no action against the borrower or the collateral without the lender's consent.

When a seller note counts as your SBA down payment

Buyers who structure this wrong usually find out at underwriting rather than at signing, when the injection they thought they had stops counting.

Two SBA rulebooks matter right now. SOP 50 10 8 took effect June 1, 2025. SBA Information Notice 5000-880695 states that SOP 50 10 8.1 becomes effective October 1, 2026. It applies to all applications issued an SBA loan number on or after that date, and lenders must keep using SOP 50 10 8 for applications submitted through September 30.

Under the current rulebook, a complete change of ownership requires an equity injection of at least 10 percent of total project costs. The SOP defines that base as all costs required to complete the change of ownership, regardless of the source of funds. That is broader than the purchase price. Working capital and closing costs financed into the loan raise the injection you owe.

On seller notes, SOP 50 10 8 is one sentence:

Seller debt may not be considered as part of the equity injection unless it is on full standby for the life of the SBA loan, and it does not exceed half of the SBA-required equity injection.

Three consequences follow.

1. Full standby means zero payments. No principal and no interest for the term of the 7(a) loan, whatever that term turns out to be. Standby tracks the loan, so a 10-year acquisition loan means a 10-year wait and a longer blended maturity stretches it further. A 24-month deferral does not qualify, which is the structure many letters of intent still copy from pre-2025 templates.
2. The cap is half. With a 10 percent injection requirement, a qualifying seller note covers at most 5 percent of total project costs. SOP 50 10 8 lists the other acceptable sources: cash that is not borrowed, cash from a personal loan repayable from something other than business cash flow, and grants with no clawback.
3. Interest can still accrue. SOP 50 10 8 lets standby debt accrue interest, add it to the standby balance, and amortize it once the 7(a) loan is repaid. A note that is silent on whether interest accrues, compounds, or is waived leaves the final balance unsettled. Better to resolve that in drafting than at payoff.

A deal can also carry more than one seller note. Only the note claiming equity credit has to be on full standby. SOP 50 10 8 explicitly contemplates seller financing in excess of the minimum injection, and requires the lender to address its repayment terms along with any standby or subordination terms. That second note is ordinary subordinated debt, and its scheduled payments are real debt service the underwriter will count.

How the note affects debt service coverage

A properly documented full standby note contributes nothing to debt service during the standby period, because no payment is contractually due. It is still a liability on the books, and it still shows up on your business debt schedule, but it does not sit in the denominator of the coverage calculation.

A note with scheduled payments behaves the opposite way. Its principal and interest join the SBA loan payment in annual debt service, and coverage is tested against that combined number. Every dollar of that payment eats coverage. If you are new to the arithmetic, the mechanics are in our walkthrough of how to calculate DSCR, and you can model a payment on the free SBA loan calculator.

Under SOP 50 10 8 the 7(a) coverage floor is 1.15 to 1 on a historical or projected basis, with global coverage at 1 to 1. For acquisitions numbered on or after October 1, 2026, that floor rises to 1.25 to 1.

What SBA Form 155 does

SBA Form 155, the Standby Creditor's Agreement, is the instrument that makes a standby structure enforceable. SOP 50 10 8 lets the lender use Form 155 or its own equivalent standby agreement form. A copy of the note must be attached to it.

The agreement does two things, in the SOP's own words. The standby creditor subordinates any lien rights in collateral securing the loan to the lender's rights in that collateral. And the creditor agrees to take no action against the borrower or any collateral securing the standby debt without the lender's consent.

What changes on October 1, 2026

SOP 50 10 8.1 was published in August 2026 and applies to applications issued an SBA loan number on or after October 1. Files with a loan number through September 30 stay under the current rules.

A claim circulating since publication holds that 8.1 kills the standby seller note as equity. The published text says the opposite, in plain language:

Seller debt that is subordinated to the Lender and on full standby (no payments of principal or interest for the term of the 7(a) loan) may be considered as equity for SBA's purposes.

What actually changed is the ceiling those notes sit under. SOP 50 10 8.1 sorts equity into Unlimited and Limited sources. Unborrowed cash, an outside-repaid personal loan, and unconditional grants are Unlimited.

Standby debt, seller debt, and non-controlling minority equity investments are Limited. The SOP states that those sources, individually or in the aggregate, may provide no more than half of the required equity injection.

Under the current rulebook a seller note competed against nothing for its 50 percent. From October it shares that half with investor capital. A buyer planning to combine a 5 percent seller note with outside investor money to reach the 10 percent will find that the two together still cap at half.

Watch the coverage row more closely than the seller-note rows. Moving an Initial Acquisition from 1.15 to 1.25 raises the bar. Requiring it be met on the last fiscal year or a two-year average, rather than projections, raises it again.

Seller-note structuring has absorbed most of the commentary since August. That row will decide more deals.

Seller financing versus bringing more cash

The alternative to a seller note is a larger check from the buyer. Neither choice is better in the abstract.

Use a standby note when your cash is limited and the seller values the total price more than immediate liquidity. Bring the cash when the seller is unwilling to wait a decade for payment, which is the position roughly half of surveyed owners now take. Many deals end up with both, plus a second non-standby note handling the piece that neither cash nor equity credit can reach.

Seller financing is also common well outside SBA deals. If your acquisition is being funded conventionally, the standby rules above do not apply, though most senior lenders will still ask for the note to be subordinated. Our overview of the types of business loans covers where each structure fits, and what is an SBA loan explains the 7(a) program itself.

What the lender asks you for

Seller financing lengthens the document list, because the note, the standby agreement, and the source of your cash injection all get papered.

Every owner of 20 percent or more, plus every proposed guarantor, files an owner financial statement, business or personal as applicable. SOP 50 10 8 requires it to be signed and dated within 120 days of submission to SBA, and to include the assets of the owner's spouse and minor children. Lenders may use SBA Form 413 or their own equivalent form.

Buying a business also normally means signing a personal guarantee, so the statement is not a formality. Our SBA Form 413 guide walks the form section by section, and how to fill out SBA Form 413 covers the line items borrowers most often get wrong.

The 120-day clock is the part that catches people. Acquisition timelines slip, and a statement prepared at the letter of intent is frequently stale by the time the file reaches SBA. Rebuilding it takes minutes when the underlying data is already structured, and an afternoon when it lives in a spreadsheet somebody has since edited.

The rest of the package is the standard acquisition set. Three years of tax returns and financials for the business being bought, plus interim statements and a business debt schedule. Then the purchase agreement, the business valuation, and proof of where your injection came from.

Proving the injection is its own exercise. SOP 50 10 8 requires the lender to verify it before disbursing any loan proceeds, using three things:

• A copy of the check or wire, plus evidence that it processed.
• A statement covering at least 30 days from the account the funds left.
• A statement showing the funds arrived, or a settlement statement showing their use.

The SOP adds that a promissory note, gift letter, or financial statement is not sufficient evidence of a cash injection on its own.

The full list is in documents needed for a business loan, and personal financial statements for a business loan covers the borrower side in more depth.

Getting your side of the file ready

Seller-note structuring belongs to your lender and both attorneys. The buyer's own financial picture belongs to you, and it is the piece most often assembled last and least carefully.

Build the personal financial statement early, keep it current, and be ready to regenerate it when the 120-day window lapses. StatementsReady produces a PDF that mirrors the current SBA Form 413 layout, with read-only Plaid bank sync so balances update without retyping. You can also run the arithmetic first with our free net worth calculator, which needs no signup.

More on the acquisition path is in our business loan applications use case, the SBA lending archive, and the broader business lending archive. If a personal guarantee is part of your deal, and it almost certainly is, start with what is a personal guarantee and the current SBA 7(a) loan requirements.