How to Finance Buying an Existing Business: SBA 7(a) Rules, Seller Notes, Lender Checks

How do I finance buying an existing small business?

Most buyers of an existing small business stack three sources: a term loan secured by the business (usually an SBA 7(a) loan, since SBA lists "changes of ownership (complete or partial)" among eligible uses and caps 7(a) loans at $5 million), a seller note for part of the price, and the buyer's own cash. The lender sizes the loan on the business's documented cash flow and the buyer's personal guarantee, so the working order is due diligence first, valuation second, financing structure third.

This guide is built from SBA's 7(a) program pages, the SBA loan regulations in 13 CFR Part 120, the SBA notices that issued SOP 50 10 8 and SOP 50 10 8.1, and IRS publications on business sales, rather than first-hand use of any lender's acquisition program. It is general information, not legal or tax advice.

The three pieces of an acquisition stack

Lenders do not price a deal from the asking price; they start from what the business has earned and work back to a loan the cash flow can carry. SBA's own guide to buying a business describes the cash flow method of valuation as the one "typically used to determine how much of a loan the business' cash flow can support". Whatever the cash flow will not carry has to come from the seller note or from your equity.

What SBA's 7(a) program allows for a change of ownership

The regulation is short. 13 CFR 120.202, as amended in 2023, states that "A Borrower may use 7(a) loan proceeds to purchase a portion of or the entirety of an owner's interest in a business, or a portion of or the entirety of a business itself." SBA's 7(a) page (checked October 2026) lists "Changes of ownership (complete or partial)" among the eligible uses alongside working capital, equipment and real estate, and states that "The maximum loan amount for a 7(a) loan is $5 million."

Eligibility is about the business you are buying as much as about you. Per the same SBA page, the business must be an operating business, operate for profit, be located in the United States, be small under SBA size requirements, not be an ineligible type, and the applicant must "Not be able to obtain the desired credit on reasonable terms from non-federal, non-state, and non-local government sources" and "Be creditworthy and demonstrate a reasonable ability to repay the loan". SBA adds that "You will always work directly with your lender and not with SBA", and points applicants to its Lender Match tool. Because SBA says most 7(a) term loans are repaid from the cash flow of the business, the seller's financial statements and tax returns carry the application.

The guarantee rule every buyer should expect

SBA's loan conditions regulation, 13 CFR 120.160, sets the default: "Holders of at least a 20 percent ownership interest generally must guarantee the loan." The same section lets SBA or a delegated lender require guarantees from other individuals or entities when deemed necessary for credit reasons, and notes that SBA "may require professional appraisals of the applicant's and principals' assets, a survey, or a feasibility study." For a buyer, that means the personal guarantee is not a negotiating point, and a business valuation or appraisal may be ordered by the lender rather than accepted from the seller.

Which SOP applies to your file

SBA's procedures for lenders live in Standard Operating Procedure 50 10. SBA's Information Notice issuing SOP 50 10 8.1 (published August 14, 2026; checked October 2026) says the new version "will become effective October 1, 2026, and will apply to all applications that are issued an SBA loan number on or after that date", while lenders "must continue to use SOP 50 10 8.0 for 7(a) and 504 applications submitted through September 30, 2026." The notice adds that 8.1 "builds upon the 7(a) and 504 lending criteria reintroduced in SOP 50 10 8.0" and that it "includes updates to change of ownership lending which are now found within Appendix 15."

Appendix 15 is where the questions buyers ask most, the minimum equity injection and when a seller note on standby may count toward it, are answered. SBA distributes the SOP itself as a downloadable document rather than a web page, so this guide quotes the issuing notice and leaves the exact percentage to your lender's current copy of Appendix 15. Ask the lender two things up front: which SOP version your loan number will fall under, and what that version requires from you in cash. Our guide to SBA loans in practice covers the rest of the 7(a) process once the acquisition structure is set.

Rules from the 2025 technical notice that still shape acquisitions

SBA's Information Notice on SOP 50 10 8 with technical updates (effective May 29, 2025; checked October 2026) spelled out change-of-ownership points buyers rarely hear until the lender raises them:

• Partial purchases make you a co-borrower. For Standard 7(a), 7(a) Small and SBA Express loans, the notice says that only a new owner "who is acquiring any direct and/or indirect ownership interest in the Operating Company must be Co-Borrowers on the new loan, regardless of the percentage of ownership being acquired."
• A seller who stays on with a small stake still guarantees. A selling owner who remains an owner and "owns less than 20% of the business post-sale must provide a guaranty for the full loan amount", for the later of "a period of at least 2 years after final loan disbursement" or until the loan has been current for 12 consecutive months.
• Investor money with strings is debt, not equity. SBA states that "any investment subject to an agreement to repay equity or make distributions to recover an investor's investment prior to release of the guaranty (e.g., certain types of redeemable preferred stock)" will be treated as debt and not equity, and that businesses with a side agreement giving "a non-guarantor owner/investor control of the business, are ineligible." If you are buying with backers, the structure of their money decides whether it counts.

Seller financing: how the seller's side works

A seller note is simply part of the price the seller agrees to receive over time instead of at closing. On the seller's side it is an installment sale. IRS Publication 537 (2025 edition, checked October 2026) defines one plainly: "An installment sale is a sale of property where you receive at least one payment after the tax year of the sale." The seller may be able to spread the gain: "If you realize a gain on an installment sale, you may be able to report part of your gain when you receive each payment." Publication 537 explains that each payment usually has three parts, interest income, a return of the seller's adjusted basis, and gain on the sale, and that "You can't use the installment method to report a loss."

This matters to the buyer because the seller's willingness to carry a note depends partly on how the payments are taxed and partly on how safe the note is behind the bank. Three terms are negotiated in almost every deal:

• Amount and term. How much of the price is deferred and over how many years. There is no SBA formula for this; it is a price negotiation.
• Standby. Lenders commonly require the seller to accept a period during which the note receives no payments, or interest only, so that early cash flow goes to the bank loan. Whether a standby note counts toward your required equity is one of the Appendix 15 questions above.
• Security. The seller usually takes a lien behind the lender, who will insist on first position in the business's assets.

Put the seller note in the purchase agreement, not in a side letter; a lender will want to see every obligation the business is taking on.

Allocating the price: the tax step both sides must agree on

Once the price is set, the buyer and seller must agree on how it is split among the assets, because the IRS taxes a business sale asset by asset. The IRS page on the sale of a business (checked October 2026) puts it this way: "The sale of a business usually is not a sale of one asset. Instead, all the assets of the business are sold." It then requires a specific method: "both the buyer and seller of a business must use the residual method to allocate the consideration to each business asset transferred." That method "determines gain or loss from the transfer of each asset and how much of the consideration is for goodwill and certain other intangible property. It also determines the buyer's basis in the business assets."

The allocation is not just a tax exercise: the split between equipment, inventory, real estate and goodwill shapes what the lender can take as collateral. Settle it with your accountant before the loan file is final, so the collateral analysis and the closing statement tell the same story.

What the lender will ask for

SBA's business guide on buying an existing business (checked October 2026) is a good proxy for a lender's checklist. It tells buyers to "do your due diligence", to ask "questions about contracts, leases, existing cash flow, and inventory", to sort out licenses and permits ("You'll need to get any needed licenses and permits from the current owner or apply for them yourself"), and to check zoning and environmental rules. On valuation it notes that "There are many different methods to determine a fair price for the sale of the business", listing the capitalized earning, excess earning, cash flow, tangible assets and specific intangible assets approaches.

On paperwork, SBA's advice is direct: "Consider hiring an attorney and an accountant." Together, it says, they can help you create and evaluate the documents a deal typically includes: a letter of intent, a confidentiality agreement, contracts and leases, financial statements, tax returns, the sales agreement and a purchase price adjustment. A lender reads the same documents, plus your personal financial statement and projections showing how the business will service the new debt. Our debt service coverage ratio guide shows how to run that number before the lender does, and the business loan application checklist covers the personal side of the file.

A working order for the deal

1. Sign a letter of intent and a confidentiality agreement, then collect the seller's financial statements and tax returns.
2. Run the cash flow method yourself. If the earnings will not carry a loan for the price, the gap closes with a seller note, more equity or a lower price.
3. Talk to an SBA-participating lender early about which SOP version applies, the Appendix 15 equity requirement and its treatment of a standby seller note.
4. Settle the price allocation with your accountant using the IRS residual method.
5. Document the seller note inside the purchase agreement, with its standby and lien terms visible to the lender.
6. Expect the guarantee, an appraisal or valuation, and a review of licenses, leases and permits as closing conditions.

If a funding partner's program fits the deal you are assembling, you can start a funding request with the same package: financial statements, tax returns, the purchase terms and your personal financial statement.

FAQ

Can I use an SBA 7(a) loan to buy only part of a business?

Yes. 13 CFR 120.202 allows 7(a) proceeds for "a portion of or the entirety of an owner's interest in a business", and SBA's 7(a) page lists both complete and partial changes of ownership as eligible uses. Per SBA's 2025 notice, expect to be a co-borrower whatever percentage you acquire, and expect the remaining owners to be reviewed for guarantees based on their post-sale ownership.

Does the seller have to carry a note?

No rule requires it. A seller note is a negotiated part of the price, used because it closes the gap between what the cash flow supports and what the seller wants. What SBA regulates is how seller debt is treated in the loan structure, including standby and whether it counts toward your equity, which sits in SOP 50 10 8.1 Appendix 15 and is applied by your lender.

How much cash do I need to put in?

The minimum equity injection for a complete change of ownership is set by the SOP version your loan falls under, and lenders may ask for more. Ask for the current Appendix 15 figure and the lender's own policy, and keep the source of every dollar documented, because SBA's 2025 notice treats investor money that must be repaid before the guaranty is released as debt rather than equity.

What if the business comes with its own building?

Real estate changes the structure. A 7(a) loan can finance real estate as part of a multiple-purpose loan, and the 504 program exists for long-term fixed assets. Our comparison of SBA 7(a) vs 504 explains which structure fits which purchase; lenders often split a building-heavy acquisition between the two.

Is buying a franchise financed the same way?

The loan mechanics are similar, but SBA keeps a Franchise Directory that, in SBA's words, "contains all franchises and other brands eligible for SBA financial assistance", and lenders rely on it. If the business is a franchise unit, read our franchise financing guide alongside this one.

Sources

1. 7(a) loans — U.S. Small Business Administration (checked October 2026)
2. Plan your business: Buy an existing business or franchise — U.S. Small Business Administration (checked October 2026)
3. SBA Information Notice 5000-880695: Issuance of SOP 50 10 8.1 — U.S. Small Business Administration, Office of Capital Access (checked October 2026)
4. SBA Information Notice 5000-868665: Issuance of SOP 50 10 8 with Technical Updates — U.S. Small Business Administration, Office of Capital Access (checked October 2026)
5. 13 CFR 120.202 Loans for changes of ownership — Electronic Code of Federal Regulations (eCFR) (checked October 2026)
6. 13 CFR 120.160 Loan conditions — Electronic Code of Federal Regulations (eCFR) (checked October 2026)
7. Sale of a business — Internal Revenue Service (checked October 2026)
8. Publication 537 (2025), Installment Sales — Internal Revenue Service (checked October 2026)