How to Finance a Business Acquisition: SBA, Seller Notes, and More
Very few buyers write a check for the full purchase price. Most small business acquisitions are funded with a stack: an SBA 7(a) loan, a seller note, and a down payment of 10% to 20%. This guide walks through every layer, what lenders actually underwrite, and how your financing shapes the offer you can make.
The Capital Stack of a Typical Acquisition
10% - 20%
Typical Down Payment
70% - 80%
Bank / SBA Loan
10% - 30%
Seller Note Range
1.25x+
DSCR Lenders Want
What a $1,000,000 Deal Usually Looks Like
The stack has three main layers: senior debt (usually an SBA 7(a) business acquisition loan) at the bottom, a seller note in the middle, and your equity, the acquisition down payment, on top.
A common structure for a $1,000,000 purchase: a $750,000 SBA loan, a $150,000 seller note, and $100,000 of buyer cash. The exact mix moves deal by deal, but most Main Street acquisitions land near these proportions.
Lenders size the loan off cash flow, not the asking price. If the business does not produce enough profit to cover the debt payments with room to spare, the deal does not get funded, no matter what the seller wants.
Every layer has a cost. Senior debt is the cheapest money, seller notes usually price a little above the bank, and equity, whether yours or an investor's, is the most expensive because it gives up ownership.
Your job as a buyer is to assemble the cheapest stack that still closes, then confirm the combined payments leave you a living wage and a cushion for slow months.
SBA 7(a) Loans: The Workhorse of Acquisition Financing
The SBA 7(a) program is how most individual buyers finance a business acquisition in the United States. The government guarantees a large portion of the loan, which lets banks lend against cash flow instead of hard collateral. Here is what actually matters when you apply.
Down Payment and Equity Injection
The SBA requires a minimum 10% equity injection on a change-of-ownership loan, measured against total project costs (purchase price plus working capital, fees, and closing costs). Many lenders ask for 15% to 20% when the deal is large, the industry is volatile, or the buyer lacks direct experience.
Under current SBA rules, a seller note can count toward part of that injection if it sits on full standby, no payments of principal or interest, for at least the first 24 months of the loan. That is a meaningful lever: on a $1,000,000 deal it can turn a $100,000 cash requirement into $50,000 cash plus a $50,000 standby note. SBA standard operating procedures change, so confirm the exact treatment with your lender before you write it into an offer.
Terms, Rates, and Fees
- Loan size, The 7(a) program caps at $5,000,000 per borrower. Most Main Street acquisitions borrow between $350,000 and $2,500,000.
- Term, 10 years is standard for a business acquisition. If commercial real estate makes up the majority of the loan, the term can extend to 25 years, which lowers the monthly payment substantially.
- Rate, Most acquisition loans float at the Prime rate plus 2.25% to 3.00%, adjusting quarterly. Some lenders offer fixed rates, usually at a premium.
- Guaranty fee, The SBA charges a one-time guaranty fee, typically between 0% and 3.75% of the guaranteed portion depending on loan size and the current fee schedule. It can usually be financed into the loan.
- Prepayment, Loans with terms under 15 years have no prepayment penalty, so you can refinance or pay down early once the business is performing.
What Lenders Actually Underwrite
SBA lenders approve people and cash flow, in that order. Expect scrutiny on:
- Debt service coverage: most lenders want the business to generate at least 1.25 times the annual loan payments after a market salary for you, and stronger deals clear 1.50x
- Three years of business tax returns and interim financials, reconciled against the seller's claimed earnings
- Your personal financial statement, liquidity after closing, and credit history (most approved buyers have scores above roughly 680)
- Relevant experience: direct industry experience helps, but transferable management experience usually satisfies lenders
- A business plan and financial projections showing how you will run and grow the company
- The purchase agreement and an independent third-party valuation, which the SBA requires on most change-of-ownership deals
The Personal Guarantee
Every owner of 20% or more of the buying entity must sign an unlimited personal guarantee. If the business fails, the lender can pursue your personal assets for the shortfall. Many lenders will also take a lien on your home if it has meaningful equity and the loan is otherwise short on collateral. This is the real cost of SBA leverage: you are betting on yourself with recourse. Buy a durable business at a sane price and the guarantee is a formality; overpay for a fragile one and it is not.
Seller Financing: The Glue in Most Deals
Seller financing means the seller accepts part of the purchase price as a promissory note, paid over time from the cash flow of the business they just sold you. It is the most common gap-bridge in small business M&A, and in many deals it is what makes the numbers work at all.
Typical Seller Note Terms
- Size, Most seller notes cover 10% to 30% of the purchase price. On a $1,500,000 deal, a $150,000 to $450,000 note is a normal ask.
- Term, 5 to 7 years is typical, sometimes with a balloon payment at the end.
- Rate, 6% to 10% interest is the common range, usually a point or two above the senior debt.
- Position, The note is subordinated: the bank gets paid first, and the seller's note sits behind the SBA loan in any default.
- Security, Notes are often secured by a second lien on business assets and sometimes a limited personal guarantee from the buyer.
Standby Requirements
When an SBA loan sits above the seller note, the lender controls how and when the seller can be paid. Expect one of these:
- Full standby: no principal or interest payments to the seller for a set period, commonly the first 24 months. Required if the note is counting toward your equity injection.
- Partial standby: interest-only payments for a period, with principal deferred.
- Subordination in all cases: the seller signs an agreement putting the note behind the bank, and payments can be blocked if the SBA loan goes into default.
Negotiate the standby terms early. A seller who expects monthly checks starting day one will not enjoy discovering the standby requirement in underwriting, three weeks before closing.
Why Sellers Say Yes
A seller note is not charity. It widens the buyer pool, often supports a higher total price, earns interest, and can spread the seller's tax bill across several years through installment treatment. It also tells you something as a buyer: a seller willing to hold 15% of the price for five years believes the business will keep performing after they leave. A seller who refuses any note on a Main Street deal is not automatically hiding something, but it is worth asking why.
Earnouts, Forgivable Notes, and Retirement Funds
Earnouts
An earnout makes part of the price contingent on future performance: the seller gets extra payments if the business hits agreed revenue or profit targets after closing. Earnouts typically cover 10% to 25% of the headline price over one to three years, and they show up when the seller's growth story is unproven, when one customer dominates revenue, or when buyer and seller simply disagree on value.
One critical restriction: SBA 7(a) rules require a fixed purchase price at closing, so a traditional earnout cannot be part of an SBA-financed deal. The accepted workaround is a forgivable seller note. The price is fixed, but the note is reduced or forgiven if the business underperforms defined targets. Because the price can only move down, not up, most SBA lenders will accept it.
Define earnout metrics precisely, in writing, with the accounting method spelled out. Vague earnouts are the single most litigated term in small business acquisitions.
Using Retirement Funds: ROBS
Rollovers as Business Startups (ROBS) lets you use existing 401(k) or IRA money to fund an acquisition without early withdrawal penalties or immediate taxes. The mechanics, at a factual level:
- You form a C corporation (this structure only works with a C corp, not an LLC or S corp)
- The corporation adopts its own 401(k) plan
- You roll your existing retirement funds into that new plan
- The plan purchases stock in the corporation, putting the cash on the company's balance sheet
- The corporation uses the cash to buy the business, or as the equity injection alongside an SBA loan
Specialized providers typically charge around $5,000 to set up a ROBS and a monthly administration fee afterward. The plan must file an annual Form 5500 and be offered to eligible employees, and the structure draws IRS attention when the rules are not followed exactly.
The real risk is concentration, not compliance: ROBS moves your retirement savings into a single private company. If the business fails, both your income and your retirement take the hit. Use it deliberately, with independent tax advice, not as a last resort.
Evaluating a specific business?
Run its revenue and profit through our free valuation calculator to sanity-check the asking price before you build a financing stack around it. Takes about 5 minutes.
Investor Equity and Search Fund Structures
When your own cash cannot cover the down payment, or the deal is bigger than an SBA loan allows, outside equity fills the gap. Four common structures:
Self-Funded Search
You find the deal, sign the SBA loan personally, and raise a minority slice of equity from individual investors to cover part of the down payment. Investors typically get preferred terms, often a preferred return plus a share of common equity, while you keep majority ownership.
Traditional Search Fund
Investors fund your salary and search costs for roughly two years, then fund the acquisition itself. You typically earn 20% to 30% of the equity, vesting over time and on performance. Suited to deals with $1,500,000 or more in earnings, larger than most SBA-only buyers pursue.
Independent Sponsor
You source and negotiate the deal first, then raise equity for that specific transaction. More control and better economics than a fund, but you carry the risk of the raise falling through after months of work on a single target.
Friends and Family Equity
A small group of people who know you, papered properly with real securities documents. Cheaper and faster than institutional money. The mistake to avoid is treating it casually: put valuation, rights, and exit expectations in writing.
One SBA wrinkle worth knowing: because every 20%+ owner must personally guarantee the loan, most buyers keep individual investors below 20% ownership. Structure your cap table with that line in mind.
How Financing Shapes Your Offer
Financing is not a step that comes after your offer. It is the constraint that defines what you can offer. Work the math before you negotiate, not after.
A Worked Example
Say you are buying a business earning $300,000 in seller's discretionary earnings, priced at $1,000,000. Your stack: $100,000 down, a $150,000 seller note on full 24-month standby, and a $750,000 SBA 7(a) loan at a 10 year term. At an illustrative 10.5% rate, the SBA payment runs about $10,100 per month, roughly $121,000 per year.
Pay yourself a $100,000 salary and the business has about $200,000 left to service $121,000 of debt: a coverage ratio near 1.65x. That deal gets funded. Now run the same business at a $1,400,000 price: the loan grows, the payment climbs past $170,000 per year, coverage drops close to 1.15x, and most lenders walk. Same business, same earnings, dead deal.
This is why financeable price is the number that matters. The market can ask whatever it wants; the debt has to be paid from the cash flow that actually exists.
1. Get Prequalified Before You Shop
Talk to two or three SBA lenders before you make an offer. A prequalification letter tells you your realistic buying power, and it makes sellers and brokers take your offer seriously. Lenders differ widely on industries they like, minimum deal sizes, and speed, so shop them like you would shop the deal.
2. Build the Stack Around the Cash Flow
Start from the business's earnings, subtract a market salary for yourself, and size total debt so coverage stays at 1.40x or better. Then allocate: senior debt first, seller note to bridge the remaining gap, equity last. If the numbers only work at 1.25x with perfect performance, the price is too high or the structure needs more standby.
3. Put the Structure in the LOI
Your letter of intent should spell out the full structure: price, cash at close, seller note size and terms, standby period, and a financing contingency. Ambiguity here becomes conflict in due diligence. Our guide to writing a letter of intent covers the exact terms to include.
4. Run Diligence and Underwriting in Parallel
Once the LOI is signed, your lender underwrites while you verify the business. Expect 60 to 90 days from LOI to close on an SBA deal. Feed the lender documents early: tax returns, interim financials, the purchase agreement, and your projections. The slowest deals are the ones where the buyer treats underwriting as someone else's job.
5. Close and Protect Your Cash
Keep a working capital reserve outside the deal, enough to run the business for at least two or three slow months. The most common early failure mode for new owners is not a bad business, it is a good business bought with every last dollar. For the full acquisition process end to end, see our guide on how to buy a business.
Frequently Asked Questions
How much of a down payment do I need to buy a business?
For an SBA 7(a) business acquisition loan, the SBA requires a minimum 10% equity injection, and many lenders ask for 15% to 20% on larger or thinner deals. On a $1,000,000 purchase that means $100,000 to $200,000. Under current SBA rules, a seller note on full standby for at least the first 24 months can count toward part of that injection, which can reduce the cash you bring to closing.
What are typical SBA 7(a) terms for a business acquisition?
Most SBA 7(a) business acquisition loans carry a 10 year term, or up to 25 years when commercial real estate is the majority of the loan. Rates typically float at the Prime rate plus 2.25% to 3.00%, adjusting quarterly. The maximum 7(a) loan is $5,000,000, and loans with terms under 15 years have no prepayment penalty.
Do sellers really finance part of the purchase price?
Yes. Seller notes covering 10% to 30% of the purchase price are common in small business deals. Terms typically run 5 to 7 years at 6% to 10% interest. When an SBA loan is involved, the lender usually requires the seller note to sit behind the bank and often on standby, meaning reduced or no payments for a set period. Sellers accept notes because they widen the buyer pool and signal confidence in the business.
Can I use my 401(k) or IRA to buy a business?
Yes, through a structure called Rollovers as Business Startups (ROBS). You form a C corporation, the corporation adopts a 401(k) plan, you roll your existing retirement funds into that plan, and the plan buys stock in the corporation. Done correctly, there is no early withdrawal penalty and no immediate tax. It requires ongoing plan administration and annual filings, and it concentrates your retirement savings in one business, so most buyers use a specialized ROBS provider and get independent tax advice.
Does the SBA allow earnouts in an acquisition?
No. SBA 7(a) rules require a fixed purchase price at closing, so traditional earnouts, where the price goes up if the business performs, are not permitted. The common workaround is a forgivable seller note: the price is fixed, but the note can be reduced or forgiven if the business underperforms agreed targets. Because the price can only move down, not up, this structure is generally acceptable to SBA lenders.
Ready to Put Your Financing to Work?
Browse vetted businesses for sale in BridgeBook's NDA-gated marketplace, or book a free 45-minute consultation to talk through your acquisition plan.