Business Acquisition Financing: How to Pay for a Business

How business acquisition financing works

When you buy a business, the purchase price (plus closing costs and working capital) has to come from somewhere. Most deals combine several sources, often called the capital stack:

1. Buyer equity: your own cash, or money from partners and investors.
2. Senior debt: a bank loan, often SBA-guaranteed for smaller US deals.
3. Seller financing: part of the price deferred as a seller note.
4. Other layers: earnouts, mezzanine debt, asset-based loans, or equity from investors.

The cash flow of the business usually services the debt. That is the key constraint: an acquisition is only financeable if the business's normalized cash flow comfortably covers all debt payments and still leaves the owner enough to live on and reinvest.

The capital stack, layer by layer

SBA 7(a) loans for acquisitions (US)

The SBA 7(a) program is one of the most widely used routes for financing small business acquisitions in the US. The SBA does not usually lend directly; it guarantees a portion of loans made by participating lenders, which makes banks more willing to lend against cash-flow businesses without large hard-asset collateral.

Things to know, in general terms:

• The program has a maximum loan size and eligibility rules (US-based, for-profit, size standards, use of proceeds).
• Lenders require an equity injection from the buyer. Whether a seller note can count toward that injection depends on current SBA rules, including standby requirements.
• Personal guarantees are standard for significant owners.
• Rates are typically variable and tied to a base rate plus a spread capped by SBA rules.
• Lenders assess the business's historical cash flow, the buyer's experience and credit, and the deal structure.

SBA rules are set out in its Standard Operating Procedures and have been revised several times recently. Treat any specific percentage or limit you read online (including on this site) as something to verify with a current SBA lender.

Conventional bank financing

Banks lending without an SBA guarantee usually want stronger collateral, lower leverage and borrowers with more experience. Terms can be shorter, which raises annual payments. Conventional debt is more common in larger acquisitions or where the business owns significant real estate or equipment.

Seller financing

Seller notes are one of the most useful tools in small business M&A. They reduce the buyer's cash requirement, keep the seller invested in a smooth transition, and can bridge price gaps. Read the full guide to seller financing and model payments in the Seller Financing Calculator.

Earnouts

An earnout pays the seller extra if the business reaches agreed targets after closing (for example revenue or gross profit over a defined period). Earnouts can make a deal work when buyer and seller disagree about the future. They require tight definitions, because disputes often arise over accounting choices, integration decisions and what "counts". Some lenders restrict earnouts in the deals they finance.

Equity partners and investors

If you lack enough equity, you might bring in partners or investors. That can unlock larger deals but dilutes your ownership and adds governance obligations. Search funds are a formal version of this, where investors back an operator to find and run one acquisition; see entrepreneurship through acquisition.

How much debt can a business support?

This is the most important question in acquisition financing. Lenders focus on the debt service coverage ratio (DSCR):

A DSCR of 1.0x means every dollar of cash flow goes to debt payments, with nothing left for the owner, reinvestment or bad months. Lenders set minimum DSCR thresholds that vary by lender and program, and prudent buyers aim well above the minimum to absorb surprises.

Remember to:

• Use normalized cash flow, after a realistic replacement salary if you will not work for free.
• Subtract recurring capital expenditure and any working capital needs.
• Include all debt service, including seller-note payments once they begin.
• Stress-test: what happens if revenue falls or rates rise?

A worked example (illustrative)

Using the default inputs in our Acquisition Financing Calculator, a $1,000,000 purchase with $200,000 buyer cash, a $100,000 seller note and the remaining $700,000 as senior debt at 9% over 10 years gives annual senior debt service of about $106,400. With normalized cash flow of $300,000 and $25,000 of capex, around $275,000 is available for debt service. Adding the seller-note payments (rate and term are inputs) lowers both DSCR and post-debt cash flow. These numbers are only illustrations of the math, not market terms.

Step-by-step: arranging acquisition financing

1. Know your budget. Use the Business Affordability Calculator to translate your cash into a target price range.
2. Get early lender conversations. Ask lenders about their criteria for your target size and industry before you make offers.
3. Screen deals for financeability. Check that normalized cash flow supports the debt.
4. Structure the LOI with financing in mind. Include a financing contingency, a proposed seller note and an exclusivity period long enough to obtain financing. See our letter of intent guide.
5. Prepare a lender package. Typically tax returns, financial statements, a personal financial statement, your resume, a business plan or transition plan, and the LOI.
6. Complete due diligence and the lender's underwriting in parallel. Use the due diligence checklist.
7. Close. Sign the purchase agreement, loan documents, seller note and any subordination agreement.

Common financing mistakes

• Treating the maximum loan amount as the right loan amount.
• Ignoring working capital: a business can be profitable and still run short of cash after closing.
• Forgetting closing costs, legal fees, valuation, and lender fees in the cash budget.
• Not modelling seller-note payments and balloons.
• Choosing a business whose cash flow depends on the departing owner.

Comparing financing offers

When you have more than one financing option, compare them side by side:

Model each offer in the Acquisition Financing Calculator using the same cash flow assumptions so you are comparing like with like.

Sources and uses: the one-page summary lenders expect

Every acquisition financing conversation becomes easier with a clear sources-and-uses table. It shows where every dollar comes from and where every dollar goes, and the two columns must balance.

Lenders read this table first. Gaps between the columns, missing working capital or no reserve are common reasons a deal is sent back. Build yours in the deal analyzer, which shows the structure visually and checks debt service coverage at the same time.

Stress testing the financing

A base-case model tells you whether a deal works if things go to plan. Lenders and experienced buyers also ask what happens when things do not. Run at least these three tests before signing:

1. Revenue down. Reduce cash flow by a meaningful amount and check whether debt service is still covered.
2. Rates up. If any debt carries a variable rate, add a few percentage points and recalculate payments with the SBA loan calculator or the deal analyzer.
3. Transition hiccup. Assume the first months after closing are weaker while customers and staff adjust to a new owner, and check that your cash reserve covers the gap.

If the deal only works in the base case, the structure is too tight. Common fixes are a lower price, more seller financing on easier terms, a longer amortisation, more equity, or an earnout that moves part of the price to future performance.

Preparing a lender package

A complete, well-organised package speeds up credit decisions and signals that you are a serious borrower. Most acquisition lenders ask for a version of the following:

• A summary of the deal: what is being bought, the price and the proposed structure
• The sources-and-uses table and your debt service coverage analysis
• Three years of business tax returns and financial statements, plus year-to-date figures
• The signed letter of intent
• Your resume and an explanation of why you are a credible operator for this business
• A personal financial statement and evidence of your equity injection
• A short transition plan covering the seller's involvement, key staff and customers
• Projections with clearly stated assumptions

Keep the package factual. Lenders discount optimistic projections; they lend against historical cash flow and your ability to keep it going.

Related reading

Financing is one step in the wider process of how to buy a small business.