One of the most consequential conversations in any business acquisition is the one about deal structure — and it is one that too many buyers and sellers enter without adequate preparation. How a deal is structured determines far more than just the purchase price. It affects how much cash the seller receives at closing, how much risk the buyer assumes, how aligned the parties' incentives are post-closing, what the tax implications are for both sides, and ultimately whether the deal gets done at all. A sophisticated understanding of the major deal structure components — cash, seller notes, bank financing, earnouts, and equity rollovers — is essential knowledge for anyone participating in lower middle market M&A.

Deal structure conversations are as much about psychology as economics. Buyers want to deploy as little upfront capital as possible while maximizing their control and upside. Sellers want certainty of payment, fair value for their business, and ideally clean hands at closing. The most successful transactions find structures that genuinely serve both parties' interests — and experienced advisors earn their fees by engineering those structures creatively within the constraints that both sides face.

All-Cash Deals

An all-cash deal is exactly what it sounds like: the buyer pays the entire purchase price in cash at closing, the seller receives all their proceeds immediately, and the transaction is complete. All-cash deals are the simplest to structure and execute, and they provide the maximum certainty of payment for the seller. For buyers, they require the most capital but involve no ongoing payment obligations to the seller post-closing.

All-cash deals are most common in transactions where the buyer has abundant equity capital (private equity firms, strategic acquirers with strong balance sheets), where the business is in an industry or situation where post-closing earnouts are impractical, or where the seller has significant leverage and the competitive dynamics of the process support demanding all-cash terms. In the lower middle market, truly all-cash deals are less common than in larger transactions, because most buyers in this segment are using a combination of equity and debt financing.

Seller Notes

A seller note is a promissory note issued by the buyer to the seller for a portion of the purchase price, to be repaid with interest over a defined period (typically 3–7 years). The seller effectively becomes a lender to the buyer for the financed portion. Seller notes are ubiquitous in lower middle market deals and serve multiple functions: they bridge valuation gaps, reduce the buyer's upfront capital requirement, and align the seller's interests with post-closing business performance.

From the buyer's perspective, a seller note is typically cheaper than bank debt (because it is subordinated and therefore carries more risk for the lender, who in this case is the seller), and does not require the same underwriting rigor as a bank loan. From the seller's perspective, a seller note reduces the certainty of full payment but is often the mechanism that makes the deal possible — particularly when the business cannot support 100% bank financing. Interest rates on seller notes typically range from 6–10% in the current environment, with payments structured as monthly amortization or a balloon at maturity.

Senior Bank and SBA Financing

Most lower middle market acquisitions are partially financed with senior debt — either a conventional bank loan or an SBA-guaranteed loan. Senior debt sits at the top of the capital structure, meaning it is repaid first in any liquidation scenario, which is why it carries the lowest interest rate of any acquisition financing component. Banks will typically lend 3–5x normalized EBITDA for lower middle market acquisitions, depending on the industry, business quality, and buyer's financial profile.

The SBA 7(a) loan program is specifically designed to facilitate small business acquisitions and is one of the most important financing tools available to buyers in the sub-$5M deal range. SBA loans allow buyers to acquire businesses with as little as 10% equity injection, finance up to $5M per loan, and benefit from longer amortization periods (up to 10 years for business acquisitions) than conventional bank financing. The tradeoff is a more intensive underwriting process, personal guarantee requirements, and SBA guarantee fees that add to the total cost of capital.

Earnouts

An earnout is a post-closing payment from the buyer to the seller, contingent on the business achieving defined performance milestones after the transaction closes. Earnouts are typically used to bridge a valuation gap — when the buyer and seller disagree on the value of the business because of uncertainty about future performance. The seller argues the business is worth more; the buyer agrees to pay the higher amount only if the business delivers the performance that justifies the premium.

Earnouts are powerful deal-making tools but must be structured carefully. The fundamental challenge is that after closing, the buyer controls the business and therefore has significant influence over whether the earnout performance targets are achieved. Sellers who agree to earnouts without adequate contractual protections — provisions governing how the business will be operated, what the buyer must invest in growth, and how earnout calculations will be audited — often find that targets that seemed reasonable at signing become elusive post-closing.

• ⚠️ Define metrics precisely: Revenue, EBITDA, or gross profit — and specify exactly how each is calculated
• ⚠️ Include anti-sandbagging provisions: Prevent the buyer from deliberately suppressing performance to avoid earnout payments
• ⚠️ Specify audit rights: The seller should have the right to review financial records relevant to earnout calculations
• ⚠️ Limit the duration: 2–3 year earnout periods are generally preferable to longer ones — the further into the future, the more uncertainty and potential for dispute
• ⚠️ Consider a revenue-based metric: Revenue is less subject to accounting manipulation than EBITDA, though it does not account for margin changes

Equity Rollovers

An equity rollover occurs when the seller accepts a portion of their consideration in the form of equity in the newly acquired entity (or in the buyer's holding company) rather than cash. Instead of cashing out 100% of their ownership at closing, the seller retains, say, 15–30% of the equity in the business going forward. The seller becomes a minority partner in a transaction they previously controlled as a majority owner.

Equity rollovers are most common in private equity transactions where the PE firm is acquiring a majority stake and wants the operator — often the selling founder — to remain engaged and aligned with the business's continued growth. The seller benefits from "two bites of the apple" — taking cash out now at a reasonable valuation, and participating in the upside of the next value-creation cycle. If the PE firm successfully grows the business and achieves a multiple expansion at the next exit, the seller's rolled equity can be worth significantly more than the cash they would have received at the original transaction.

Equity rollovers require careful tax planning and a realistic assessment of the buyer's track record and value-creation capabilities. A seller who rolls equity into a transaction managed by a PE firm with a strong track record of portfolio company growth is making a potentially excellent investment decision. A seller who rolls equity into a deal with an inexperienced buyer who lacks the resources and capability to execute their growth thesis is taking on meaningful risk for uncertain reward.

Understanding how to structure a deal that serves your goals — whether you are a buyer or a seller — is one of the most important capabilities you can develop. Our advisory team can model various deal structures and help you understand the financial, tax, and risk implications of each. Reach out to our advisory team to discuss deal structure for your specific situation, or if you are a seller, request a business valuation as the foundation for any deal structure conversation.

Combining Structure Components: A Real-World Example

Most lower middle market deals use a combination of structure components. A representative example: a $5M purchase price funded by $500K buyer equity (10%), a $3.5M SBA 7(a) bank loan (70%), and a $1M seller note on standby for 24 months (20%). This structure allows the buyer to acquire a business valued at $5M with $500K of personal equity, gives the seller $4M at closing plus $1M over time with interest, and meets SBA's seller note standby requirements for equity injection treatment.

Variations on this structure are infinite. Some deals include earnout components layered on top of a base price. Some include equity rollovers where the seller retains a minority position. Some use mezzanine debt to bridge the gap between senior bank financing and buyer equity. The right structure for any specific deal depends on the deal size, the business's cash flow profile, the buyer's capital availability, the seller's priorities, and the creative capabilities of the advisory team managing the transaction.

❓ Frequently Asked Questions

Which deal structure is best for a seller who wants maximum certainty?

A seller who prioritizes certainty of payment should negotiate for maximum cash at closing, a minimal seller note with strong security provisions, and limited or no earnout exposure. All-cash deals offer the highest certainty but may require accepting a lower headline price, as buyers price certainty premiums into all-cash bids. The right tradeoff between certainty and total proceeds depends on the seller's financial situation, risk tolerance, and confidence in the buyer's ability to service any deferred consideration.

How does deal structure affect the purchase price?

Deal structure and purchase price are inseparable. More seller-friendly structure (higher cash at closing, less deferred consideration) typically supports a lower headline price. More buyer-friendly structure (seller note, earnout, equity rollover) allows buyers to justify higher total consideration because they are not paying it all upfront. Neither structure is inherently better — the appropriate price and structure depend on the specific business, market conditions, and the parties' relative negotiating positions.

Can deal structure change after the LOI is signed?

Yes. LOI-level deal structure is typically indicative, not binding (except for exclusivity). Due diligence findings often result in adjustments to both price and structure. A seller who insists that the deal structure is fixed after LOI signing will typically find that buyers push back — the entire purpose of due diligence is to refine the buyer's understanding of what they are acquiring, and structure adjustments are a normal and expected response to material diligence findings.

Final Thoughts

Deal structure is where the art of M&A truly lives. The most important deals are not the ones where one side "won" the structure negotiation — they are the ones where both sides arrived at an arrangement that served their fundamental interests, built trust between the parties, and set the transaction up for post-closing success. Understanding the full toolkit of structure components, and knowing when and how to deploy each, is one of the most valuable capabilities any buyer or seller can develop.