Comparing Acquisition Financing Structures: How I Stack SBA, Seller Notes, Equity, and Earnouts on Real Deals

Acquisition financing structures are the specific combinations of debt, seller paper, equity, and contingent payments used to fund a business purchase — and the right stack is chosen for cash-on-cash return and downside protection, not for the lowest headline interest rate. On mid-market deals I run, the typical stack is 60-80% senior debt (SBA 7(a) or conventional), 10-25% seller note, 0-15% equity, and an earnout only when there is a real, dateable performance question. Compare structures on five variables — dilution, debt service coverage, personal guarantees, capture of upside, and time-to-close — not on rate alone.

Look, I’ve done 300+ deals over 30 years. The biggest returns weren’t the deals with the cheapest money. They were the deals where the structure fit the risk — seller carrying paper on the earnings quality he was pitching, SBA covering the working capital, and my equity kept small so the cash-on-cash math worked even when the first year missed plan.

Here’s how I compare the real financing structures side by side before I sign an offer — the same framework we teach inside Dealmaker Academy. Before I go further: I’m not a lender or a securities lawyer. Every structure below is what I use to decide which stack fits which deal. Once you narrow to a working structure, bring in an SBA banker, a deal attorney, and your CPA. Always.

Why Structure Beats Rate on Every Real Deal

The financing structure decides the cash-on-cash return, the survival of the business in a bad year, and how much of the upside stays with you. Interest rate decides the monthly payment. Structure matters ten times more than rate on a small-to-mid-market acquisition.

A 10.5% SBA loan with a 10-year amortization and a 2-year seller-note standby beats an 8% conventional loan with a 5-year amortization and a personal guarantee against your house every day of the week. Same business, same price — completely different risk profile for the buyer. Focus on terms over price.

The Five Financing Structures That Show Up on Real Deals

Small-to-mid-market acquisition financing lives inside five instruments: SBA 7(a) loans, conventional senior debt, seller notes, private equity or partner equity, and earnouts. Every stack you’ll see is some combination of these five.

The five structures I compare on every deal:

• SBA 7(a) loans. Federally guaranteed, up to $5M, 10-year amortization for goodwill deals, 25-year for real estate. Widely available for owner-operator acquisitions under $10M enterprise value.
• Conventional senior debt. Bank or non-bank cash-flow lender. Faster than SBA, no size cap, but tighter covenants and shorter amortization (usually 5-7 years).
• Seller notes. The seller finances part of the purchase price at a negotiated rate and term. The single most flexible instrument in the stack.
• Equity (yours, partners, or private capital). Cash into the deal that isn’t repaid on a schedule. Dilutes ownership but preserves debt capacity.
• Earnouts. Contingent payments tied to post-close performance. Not really financing — it’s price adjustment dressed up as financing — but sellers treat it as part of the stack, so you need to know how to price it.

SBA 7(a) vs Conventional Debt: When Each Wins

SBA 7(a) is the default senior-debt instrument for owner-operator acquisitions under $5M in loan size because it offers longer amortization and lower equity requirements than conventional debt — in exchange for a personal guarantee, longer close, and lender scrutiny of the buyer as much as the business.

How I choose between the two:

• SBA 7(a) wins when the deal is under $10M enterprise value, you’re operating the business yourself, and you need 10-year amortization to make DSCR clear 1.5x. The longer amortization is the whole point — it drops monthly debt service by roughly 30-40% versus a 5-year conventional note on the same principal.
• Conventional debt wins when the deal is above the SBA size cap, when you’re a repeat buyer with a track record the bank underwrites, or when you need to close inside 45 days. Conventional lenders can move in 30-45 days; SBA typically runs 60-120.
• Personal guarantee is required on both. SBA requires it above 20% ownership; almost every conventional cash-flow loan does the same at this deal size. Deal with it, price it into your risk tolerance, and don’t pretend the guarantee isn’t there.

SBA 7(a) rates typically float at Prime + 2.75% to Prime + 3.0% for larger notes; conventional rates depend on the lender and the deal, but tend to price close on absolute yield. Rate difference is small; structural difference is large.

Seller Notes: The Most Underused Lever in the Stack

A seller note is a promissory note from the buyer to the seller covering part of the purchase price, typically 10-25% of enterprise value, at 5-8% interest, with a 3-7 year term and often a 12-24 month standby period during which no principal is paid. Seller notes align the seller with the numbers he pitched, preserve your bank debt capacity, and are the single easiest way to close a valuation gap without paying cash.

The four seller-note terms I always negotiate:

1. Size. 10-25% of enterprise value is standard. Below 10% and the seller loses skin in the game; above 25% and most SBA lenders will require the note to be on full standby.
2. Rate. 5-8% is the negotiable band. Sellers anchor on “what a bank would charge”; you anchor on “what a subordinated, unsecured note actually deserves.”
3. Standby period. Twelve to twenty-four months during which no principal (and sometimes no interest) is paid. This is the difference between a seller note that helps DSCR and one that breaks it.
4. Offset rights. Written right to offset note payments against indemnification claims from the purchase agreement. Without offset, the note is just cash you’re sending to a seller who may already have breached the reps.

You can buy a business like leasing a car — structured payments over time — and the seller note is the biggest single reason that’s possible.

Equity: How Much to Put In, and Where It Comes From

The equity slice of the stack should be the smallest number that gets the deal financed without breaking DSCR or triggering a lender equity requirement. On SBA deals, that’s usually 10% of the total project cost — half of which can come from a seller note on full standby.

Three equity sources and how they compare:

• Your own cash. Cleanest, fastest, no cap-table complication. But every dollar you put in is a dollar of cash-on-cash return you have to earn back before you’re actually making money on the deal.
• Partner or friends-and-family equity. A common-equity partner takes a share of the business at close in exchange for cash into the deal. Cheaper than institutional capital, faster to close, but you now have a co-owner with rights.
• Institutional or SBIC equity. Small-cap private capital, usually structured as preferred equity with a coupon plus warrants or a conversion feature. Higher cost, more paperwork, but real capital that can scale into follow-on acquisitions.

The cash-on-cash math is simple: a $2M deal financed with $200K of your equity and $1.8M of debt (paying $60K a year in cash after debt service) earns 30% cash-on-cash. The same deal with $800K of equity earns 7.5%. Structure the stack to keep equity small.

Earnouts: Price Adjustment, Not Financing

An earnout is a contingent payment to the seller based on post-close performance — usually revenue, gross profit, or EBITDA over a 1-3 year measurement period. Earnouts belong in the deal only when there is a specific, dateable question about future performance the seller is pitching but can’t yet prove.

Three rules I apply to every earnout:

• Tie the metric to something the seller can influence and you can measure. Revenue is easy to measure but easy to game (channel-stuff, pull-forward). EBITDA is harder to game but easier for a buyer to suppress with post-close spending. Pick the metric the deal actually turns on.
• Cap the earnout in dollars and in duration. No open-ended earnouts. A cap protects both sides from litigation when the number lands on the wrong side of the threshold.
• Write the calculation and the dispute mechanism into the purchase agreement. Roughly 80% of earnout disputes come from ambiguous language, per repeated PitchBook and M&A survey coverage. Kill the ambiguity before close and you kill most of the litigation risk.

How I Score Structures Side by Side

Compare any two financing stacks on five variables: cash-on-cash return in the base case, DSCR in a 20% downside case, size of the personal guarantee, dilution of the buyer’s ownership, and time to close. Rate is a distant sixth.

The five-variable comparison sheet I fill out on every deal:

1. Cash-on-cash return, base case. Free cash after debt service divided by equity in. Below 15%, the deal isn’t paying you for the work.
2. DSCR in a 20% revenue downside. If it drops below 1.0, the stack is too aggressive. Restructure with more seller paper or more standby before you sign.
3. Personal guarantee exposure. Total dollars personally guaranteed across all lenders. Know this number in writing before you compare offers.
4. Buyer ownership after close. With equity partners, you may end up owning 60% of a business you’re running full-time. That’s a different deal than owning 100%.
5. Time to close. A structure that closes in 45 days beats a cheaper structure that takes 120 days on a competitive deal. Sellers walk while you wait on paperwork.

Common Stacks That Actually Fund Real Deals

Most owner-operator acquisitions under $5M close with one of three financing stacks: SBA-heavy with seller note, conventional-plus-equity for repeat buyers, or seller-financed with a bridge for creative structures. Knowing which stack fits your deal profile is 80% of the financing conversation.

The three stacks I see close most often:

• SBA 7(a) 80% + seller note 15% + equity 5%. Standard for a $1-5M owner-operator acquisition. Long amortization keeps DSCR healthy; seller note aligns the seller; equity is small enough to make cash-on-cash work.
• Conventional debt 60% + partner equity 25% + seller note 15%. For repeat buyers doing $5-25M deals with a private equity partner or SBIC. Faster close, larger absolute check, less personal guarantee exposure spread across partners.
• Seller note 60-80% + small equity + short-term bridge. When the bank doesn’t fit but the seller wants out. Higher rate on the seller note, tighter covenants, but the deal closes. Refinance into conventional debt inside 24 months once the business is under your control.

Frequently Asked Questions

What are the main acquisition financing structures?

The five instruments that show up on nearly every acquisition are SBA 7(a) loans, conventional senior debt, seller notes, equity (your own, a partner’s, or institutional), and earnouts. Every real financing stack is some combination of these five. Compare structures on cash-on-cash return, DSCR in a downside case, personal guarantee exposure, dilution, and time to close — not on interest rate alone.

Is SBA 7(a) or conventional debt better for buying a business?

SBA 7(a) is the default for owner-operator acquisitions under $10M enterprise value because the 10-year amortization drops monthly debt service by 30-40% versus a 5-year conventional note, which keeps DSCR healthy. Conventional debt wins when the deal is above the SBA size cap, when you’re a repeat buyer with lender relationships, or when you need to close inside 45 days. Both require a personal guarantee at this deal size.

How much of an acquisition can be financed with a seller note?

Seller notes typically cover 10-25% of enterprise value at 5-8% interest, with a 3-7 year term and a 12-24 month standby period during which no principal is paid. Above 25%, most SBA lenders require the seller note to be on full standby. The size, rate, standby, and offset rights are all negotiable — and they are the four terms that decide whether a seller note helps DSCR or breaks it.

How much equity do I actually need to put into a deal?

On SBA-financed acquisitions, the equity requirement is usually 10% of total project cost, and half of that can come from a seller note on full standby — meaning your out-of-pocket cash can be as low as 5%. On conventional deals with partner equity, the check size is larger but spread across partners. The equity slice should be the smallest number that gets the deal financed without breaking DSCR, because every dollar of equity reduces cash-on-cash return.

When should an earnout be part of the deal structure?

An earnout belongs in the deal only when there is a specific, dateable question about future performance the seller is pitching but can’t yet prove — a new customer contract, a recent product launch, or a step-up in run-rate over the last two quarters. Cap the earnout in dollars and duration, tie it to a metric both sides can measure, and write the calculation into the purchase agreement. Roughly 80% of earnout disputes come from ambiguous drafting.

How do I compare two financing offers side by side?

Score both stacks on five variables: cash-on-cash return in the base case, DSCR in a 20% revenue downside case, total dollars personally guaranteed, your ownership percentage after close, and time to close. Rate is a distant sixth. Two stacks with the same headline rate can have wildly different personal-risk profiles once you look at the guarantee and the covenant package.

What is the difference between financing structure and purchase price?

Purchase price is what the seller is paid on paper. Financing structure is how those dollars are assembled and repaid. The same $3M purchase price can be structured as $3M cash at close (highest seller value, lowest buyer flexibility), as $2M SBA plus $700K seller note plus $300K equity (balanced), or as $500K equity plus $2.5M seller note (highest buyer flexibility, lowest cash to seller). Sellers price on hope; buyers pay on cash flow. The structure is where those two numbers meet.

What are the biggest mistakes buyers make on financing structure?

Four mistakes show up repeatedly: chasing the lowest rate instead of the healthiest DSCR, putting in too much equity and killing cash-on-cash return, taking a seller note with no standby and breaking the debt-service model, and using an open-ended earnout that guarantees a dispute. All four are avoidable with a five-variable comparison sheet before you sign the LOI.

Where can dealmakers learn to structure financing on live deals?

Dealmaker Academy walks the full financing stack on real acquisition targets with Carl Allen and the coaching team. The Protégé Community is where active dealmakers share the actual term sheets and structures they closed with each other. See more due diligence frameworks we use before every offer.

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Next move: pull the last term sheet you received and score it on the five-variable comparison — cash-on-cash, downside DSCR, personal guarantee, dilution, time to close. If any variable is off, restructure before you sign. Then book a coaching call to walk the stack through with the team, and bring your SBA banker and deal attorney in before you close.