Acquiring a business is one of the most capital-intensive decisions a business owner or investor will make. Unlike real estate, where the collateral is tangible and lenders have well-established frameworks, business acquisitions present a more complex underwriting challenge: the primary collateral is cash flow, the asset is a going concern that may be difficult to liquidate, and the success of the investment depends substantially on factors — management transition, employee retention, customer relationships — that no lender can fully evaluate in underwriting.
Despite this complexity, business acquisitions are well-financed transactions when they are structured properly. The key is understanding how the various capital sources interact — and how to assemble a stack that gets the deal closed at terms that allow the acquired business to service its debt and generate the returns the buyer is targeting.
The components of a business acquisition capital stack
Senior debt: the foundation
Senior debt is the largest piece of most business acquisition capital stacks and is secured by all assets of the acquired business: receivables, inventory, equipment, real estate if applicable, and intangibles including goodwill. Senior lenders look primarily at EBITDA — earnings before interest, taxes, depreciation, and amortization — as the measure of a business's ability to service debt.
Maximum senior debt multiples vary considerably by lender type and deal characteristics, but a rough framework: bank senior debt typically runs 2x to 3x EBITDA; non-bank and specialty finance lenders may go to 3x to 4x; private credit funds in sponsor-backed transactions may reach 4x to 5x for the right business profile. The multiple is constrained by debt service coverage — the lender needs to see that the business can cover debt payments with meaningful headroom even under a stress scenario.
Seller financing: the alignment tool
Seller financing — the seller accepting a note for a portion of the purchase price rather than cash at closing — is both a financing tool and a risk management tool. When a seller takes back paper, they are signaling confidence in the business's continued performance, and they retain skin in the game during the transition period. Lenders view seller financing favorably because it demonstrates seller confidence and reduces the buyer's required cash equity.
Seller financing is not a sign of weakness in a deal. It is often the element that makes a deal work — for the buyer, the seller, and the lender.
Seller notes are typically subordinated to senior debt and carry a below-market interest rate (often with a portion deferred), reflecting their risk position in the capital stack. Amounts of 10% to 30% of purchase price are common. Some lenders require the seller note to be on full standby — no payments for a defined period — to ensure that debt service on the senior loan is not impaired during the business transition.
Mezzanine financing
When the senior debt and seller financing are not sufficient to bridge the gap to the purchase price, mezzanine financing can fill the middle of the capital stack. Mezzanine lenders sit between senior debt and equity, typically secured by a pledge of the buyer's equity interest in the acquired entity rather than by business assets. They are compensated for their subordinated position with higher interest rates and, in some cases, equity participation in the form of warrants or conversion rights.
Mezzanine financing is most common in larger transactions ($5M and above) where the gap between senior debt capacity and the equity available to the buyer is meaningful. In smaller transactions, the same economic role is often played by seller financing or by additional equity from the buyer or co-investors.
Equity: the buyer's commitment
Lenders require the buyer to have meaningful equity in the transaction. The standard bank requirement is 20% to 25% of total acquisition cost in the form of buyer equity, though non-bank lenders and private credit may be more flexible in the right deal. Equity can come from the buyer's own capital, co-investors, or private equity — and the source of equity matters to lenders who want to understand the full ownership structure and the depth of financial commitment behind the deal.
How to think about deal structure
Before approaching any lender, a buyer should build a detailed model that shows purchase price, EBITDA at current run rate, proposed debt service across all layers of the capital stack, and projected coverage ratios. This model serves two purposes: it tells the buyer whether the deal pencils at the proposed purchase price, and it gives lenders the information they need to underwrite efficiently.
A business acquired at 5x EBITDA that generates 1.4x EBITDA coverage of all debt service is a fundable deal for many lenders. The same business at 8x EBITDA with 0.9x coverage is not — regardless of how compelling the strategic rationale is. The math is the foundation.
The working capital question
One of the most common mistakes in business acquisition financing is treating working capital as an afterthought. Acquisitions require not just the purchase price capital but operating capital for the transition period: covering payroll while receivables are collected from customers who may slow-pay during a transition, funding inventory for a business that operates on credit terms with suppliers, and maintaining a cash buffer for unexpected operational issues that almost always arise in the first 90 to 180 days of new ownership.
Working capital should be explicitly addressed in the financing structure — either through a revolving credit facility sized at closing, or through a defined reserve that ensures operational continuity. Buyers who close a leveraged acquisition with no working capital cushion are taking a significant operational risk that can materially impair the business's ability to service its acquisition debt in the critical early months.
CAPITICS has structured acquisition financing across a wide range of business types and transaction sizes. If you are evaluating a business acquisition, reach out early — the financing structure should inform the deal structure, not follow it.