Small Business Acquisitions and How to Finance Them

Most small business acquisitions in the US are financed with a stack, not a single loan: an SBA 7(a) loan or bank term loan covers the bulk of the purchase price, a seller note bridges part of the gap, the buyer puts down equity (usually 10%+), and revenue-based funding or a line of credit covers working capital for the first months under new ownership. There is no single product that does all of this well, and the buyers who close cleanly are the ones who match each layer of the deal to the right source of money. This guide walks through how acquisition financing actually gets underwritten, how to structure the stack, and where fast revenue-based capital fits when the bank timeline and the seller's timeline do not line up.

What acquisition financing really is

When you buy an existing business, you are not borrowing against an idea — you are borrowing against a track record. That changes everything about how the deal gets funded. A lender underwriting an acquisition is asking two questions at once: can this business service new debt out of its historical cash flow, and can this specific buyer run it well enough to keep that cash flow intact after the transition.

That is why acquisition financing is almost always layered:

• Senior debt — an SBA 7(a) loan or a conventional bank term loan, typically the largest piece, secured by business assets and often personal guarantees.
• Seller financing — a note the seller carries for part of the price, paid back over time. This aligns the seller's incentives with a smooth handoff and reduces how much outside capital you need.
• Buyer equity — your own cash into the deal. SBA rules generally expect at least 10% equity on a business acquisition, and lenders like to see the buyer with real skin in the game.
• Working capital — the money that keeps the business running through the ownership change: payroll, inventory, the gap while receivables catch up. This is where revenue-based funding and lines of credit do their job.

The mistake first-time buyers make is treating the purchase price as the whole number. The purchase price is the down payment on a going concern; the working capital to survive month one through month six is what actually protects the deal.

The main ways to finance a business purchase

Each source of acquisition capital has a job it does well and a job it does badly. Match the tool to the layer.

SBA 7(a) loans. The workhorse of US small business acquisitions. Long amortizations (often up to 10 years for a business without real estate), competitive rates, and comfort with buying an established, cash-flowing business. The trade-off is time and paperwork: business valuation, personal financial statements, tax returns, and a close that commonly runs several weeks to a few months. Great for the senior piece, poor for anything that needs to fund next week.

Conventional bank term loans. Faster than SBA for strong-credit buyers with collateral and an existing banking relationship, but banks are conservative on goodwill-heavy deals (buying a business that is mostly cash flow, not equipment or real estate).

Seller financing. Often the difference between a deal that closes and one that dies. A seller note lowers the outside capital you need and signals the seller believes the business will keep performing. Many SBA-backed deals require a portion of the seller note to be on full standby — no payments for a period — which the SBA can count toward the buyer's equity injection.

Revenue-based funding / MCA marketplace. This is working-capital money, underwritten on the business's bank deposits and revenue rather than the buyer's credit score. It funds fast — often in 24 to 48 hours — with FICO 500+ acceptable and minimums around $10,000, and it is repaid as a set share of ongoing sales. It is not how you buy the business; it is how you fund payroll and inventory in the weeks after you take the keys, or how you cover a short gap while an SBA close drags on. Repayment flexes with your deposits, which matters most during a transition when volume can wobble. Nothing here is ever guaranteed — approval depends on the deposit history the marketplace can verify.

Business lines of credit. Revolving working capital for a buyer who has time to establish credit and wants a reusable cushion rather than a lump sum.

How lenders underwrite an acquisition

Understanding the underwriting math lets you structure a deal that gets approved instead of one that gets declined after weeks of diligence.

Cash flow coverage is the whole game. Lenders take the business's adjusted cash flow — often expressed as seller's discretionary earnings (SDE) or EBITDA — and check whether it comfortably covers all the new debt payments with room to spare, plus a reasonable salary for you as the new owner-operator. If the combined debt service eats most of the cash flow, the deal is fragile and lenders know it. Structure the stack so the business breathes.

Quality of earnings. Underwriters look at how stable and clean the historical revenue is: customer concentration (is one client half the revenue?), recurring vs. one-time sales, margin trends, and whether the books tie to the tax returns. A business with steady, diversified deposits is far easier to finance than one with lumpy, unexplained swings.

Buyer fit. Relevant experience in the industry, a credible transition plan, and management staying on for a handoff period all reduce perceived risk. Buying a business in a field you know is worth real basis points.

Deposit-based approval for the working-capital layer. Revenue-based funders read the business's actual bank statements — daily and monthly deposit volume, how many negative days, average balances. Because they lean on demonstrated revenue instead of a credit report, they can approve a buyer whose personal credit is mid-500s as long as the business's deposits support it. Learn more in our guide to revenue-based financing.

Structuring the deal: a sample capital stack

Here is how the layers typically fit together on a mid-sized acquisition. These are illustrative structures, for example only — every deal is negotiated on its own facts, and none of these represent an offer or a guarantee.

Notice the speeds don't match. The senior debt is slow and the working-capital layer is fast — and that mismatch is exactly the problem revenue-based funding solves. When the SBA close slips two weeks past the seller's expected date, or when your first payroll under new ownership lands before receivables catch up, a fast deposit-based advance keeps the transition from stalling. You repay it as a share of the sales the business is already generating.

Decision framework: matching the funding to the situation

Use this to decide which layer of capital you actually need — and which to avoid.

An SBA 7(a) loan works best when:

• You are buying an established, cash-flowing business with clean books and tax returns.
• You have time — a close measured in weeks to months fits your seller's timeline.
• You want the longest amortization and lowest monthly debt service to keep the business breathing.

Avoid leaning on SBA alone when: the seller needs to close fast, the business's value is heavily goodwill with few hard assets, or you need money in the account this week — SBA does not move at that speed.

Seller financing works best when: the seller is motivated to see a smooth transition, wants to spread out their tax hit, and believes in the business enough to carry a note. It shrinks how much outside capital you need.

Revenue-based / MCA marketplace funding works best when:

• The business already has steady bank deposits — approval rides on revenue and deposits, not your credit score (FICO 500+ acceptable, minimums around $10,000).
• You need working capital fast — 24 to 48 hours — to cover payroll, inventory, or a gap while the senior loan closes.
• You want repayment that flexes with sales during an unpredictable transition period.

Avoid revenue-based funding when: you are trying to finance the entire purchase price with it (wrong tool — it's a working-capital layer, not senior acquisition debt), or the business's deposit history is too thin or erratic to support it. It is a bridge and a cushion, not the foundation.

Common mistakes that kill acquisition deals

• Under-capitalizing working capital. Buyers obsess over the purchase price and forget that the business needs cash to operate the day after close. The most common cause of a failed acquisition is a well-priced deal that runs out of operating cash in month two.
• Trusting the seller's numbers without verification. Tie the books to the tax returns and the bank deposits. If they don't reconcile, that gap is your risk.
• Ignoring customer concentration. If one client is a huge share of revenue and they leave with the old owner, the cash flow you underwrote disappears.
• Stacking too much debt service. If senior debt plus a seller note plus working-capital repayment together consume nearly all the cash flow, one soft month breaks you. Build in coverage room.
• Mismatching speed. Committing to a seller's fast close while relying only on slow SBA money. Line up a fast working-capital source so a timeline slip doesn't blow the deal.

A practical timeline for financing a purchase

Here's the sequence that keeps a deal on track:

1. Pre-qualify yourself and the target. Pull the last two to three years of tax returns, financial statements, and — critically — bank statements. Deposit history is what both SBA lenders and revenue-based funders read.
2. Get a valuation and letter of intent. Agree on price and rough structure with the seller, including how much of a note they'll carry.
3. Line up senior debt early. Start the SBA or bank process first — it's the slowest piece and everything else waits on it.
4. Negotiate the seller note. Structure it to complement, not compete with, the senior loan. Standby terms may count toward your equity.
5. Pre-arrange the working-capital layer. Have a revenue-based funding source ready to move on 24–48 hours' notice so a close slip or a first-month cash crunch doesn't stall the handover.
6. Close, then protect cash flow. The first 90 days under new ownership are where deals are won or lost. Keep operating capital available and watch deposits weekly.

For more on funding the operating side of a business you already own, see our working capital financing guide.