Business Acquisition Financing: How to Finance Buying an Existing Business

Buying an existing business is, in one sense, an easier financing case than starting one from scratch — there is a real operating history to underwrite against, rather than a projection. In another sense, it is more complicated, because the file a lender evaluates is not just the buyer's; it is the seller's historical financials, the structure of the deal itself, and the buyer's capacity to run what they are acquiring, all layered together.

Understanding how acquisition financing is actually evaluated — and where these deals most commonly break down — changes how a buyer structures the offer and prepares the file before approaching a lender.

What Makes Acquisition Financing Different

In a startup loan, the lender has no operating history to review and must rely on projections and the founder's background. In a business under one year old, there is some thin history to work with. In an acquisition, there is often years of documented performance — but it belongs to the seller, not the buyer, and the lender's core question shifts: not "will this business generate cash flow," but "will this business generate the same cash flow under new ownership, and can this specific buyer run it."

This is why acquisition underwriting evaluates two things simultaneously that other financing products evaluate separately: the target business's financial history, and the buyer's qualifications to operate it. A financially strong business acquired by a buyer with no relevant experience is a harder underwriting case than the numbers alone suggest, and a buyer with strong industry experience acquiring a mediocre business faces the opposite challenge — the buyer's qualifications don't offset a target business that cannot support the debt.

How the Target Business's Financials Are Evaluated

Seller's Discretionary Earnings (SDE) or EBITDA. For most small business acquisitions, the lender's central calculation is SDE — the business's net profit plus the owner's salary, benefits, and discretionary or one-time expenses added back — which represents the actual cash flow available to a new owner. This figure, not simple net profit as reported on tax returns, is what most acquisition lending is sized against, because it normalizes for how differently small business owners often run expenses through the business.

Multiple years of tax returns and financial statements. Lenders typically require two to three years of the target business's tax returns and financial statements, cross-referenced the same way bank statements are read for any other lending decision — looking for consistency between what the tax return reports and what the bank deposits actually show, since a mismatch between the two is one of the most common red flags in acquisition underwriting.

Trend, not just a snapshot. A business with declining revenue over the past three years, even if still profitable today, is underwritten more conservatively than a business with flat or growing revenue over the same period, because the lender is financing what the business is expected to generate going forward, not what it generated at its peak.

Post-acquisition DSCR. The debt service coverage ratio calculation for an acquisition includes the new acquisition debt on top of any existing business debt being assumed, sized against the SDE figure rather than raw net profit. A deal where SDE barely covers the proposed debt service leaves little cushion for a transition period, seasonal fluctuation, or any softness in the business after the change in ownership — and lenders price and structure around that cushion, or lack of it.

How the Buyer Is Evaluated

Relevant industry or management experience. A buyer with direct experience in the same industry, or demonstrated management experience even in a different industry, is viewed as materially lower risk than a buyer with no relevant background, because the lender is betting on continuity of performance under a new operator. This evaluation is qualitative but carries real underwriting weight, similar to how experience is weighed in pre-revenue startup financing — the difference here is that the lender has an existing business's track record to protect, not just a plan to evaluate.

Personal financial strength and credit. As with most small business financing, a personal guarantee from the buyer is standard, and personal credit history and financial strength are evaluated alongside the target business's financials — particularly because acquisition loans are often larger than typical working capital or equipment requests, given they finance the purchase of an entire operating business.

Down payment or equity injection. Acquisition financing, including SBA 7(a) loans used for business acquisition, typically requires the buyer to contribute 10% to 20% of the purchase price as an equity injection. This serves the same function as a down payment in any secured lending — demonstrating buyer commitment and reducing lender exposure — and a buyer without sufficient capital for this contribution will struggle to structure a deal regardless of how strong the target business's financials are.

How the Deal Itself Is Structured

Purchase price allocation. How the purchase price is allocated between hard assets (equipment, inventory, real estate) and goodwill (the value of the business's customer base, reputation, and earning power beyond its physical assets) affects both financing and tax treatment. Lenders are generally more comfortable financing a larger proportion of hard-asset value, since it provides tangible collateral, and more cautious about a purchase price heavily weighted toward goodwill, since that value is harder to recover if the business does not perform post-acquisition.

Seller financing. It is common, and often expected by lenders, for the seller to carry a portion of the purchase price themselves — typically 5% to 15% — structured as a note the buyer repays over time. Lenders view seller financing favorably because it signals the seller's confidence that the business will continue performing, and because it often sits in a subordinate position that effectively increases the buyer's total equity contribution from the primary lender's perspective.

Earnout provisions. In deals where the business's future performance is less certain, part of the purchase price may be structured as an earnout — additional payments to the seller contingent on the business hitting specific performance targets after the sale. This shifts some risk back to the seller and can make an otherwise marginal deal financeable, though it adds complexity to the transaction structure that both parties need to document clearly.

What to Prepare Before Approaching a Lender

A buyer preparing an acquisition financing request should assemble a file that goes beyond typical loan documentation: the target business's tax returns and financial statements for the past two to three years, a clear calculation of SDE with add-backs documented and defensible, a letter of intent or purchase agreement outlining the proposed deal structure, a resume or summary of the buyer's relevant experience, and a clear use-of-proceeds breakdown showing exactly how the purchase price and any working capital needs will be funded.

A buyer who arrives with SDE already calculated, deal structure already outlined, and their own qualifications clearly articulated presents a materially more underwritable file than one who shows up with only a purchase price and an intent to buy — the difference often determines whether a lender can move quickly or needs several rounds of clarification before a real evaluation can even begin.

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