How to Finance a SaaS Acquisition: Loans, Seller Notes and Earnouts

Short answer: most SaaS acquisitions are funded with a stack, not one source. A common structure for a lower-middle-market deal is an SBA 7(a) loan covering up to 80% to 90% of the price, a seller note of 10% to 20% held back on terms, and the buyer's cash equity for the rest, sometimes with an earnout tied to future performance. SBA 7(a) loans run up to $5M, and lenders want a business with clean, verifiable cash flow and a founder willing to help with transition. Last updated July 2026. Educational only, not financial, lending, tax, or legal advice.

The four ways to finance a SaaS acquisition

Buyers rarely pay all cash from their own pocket. They assemble a capital stack from four building blocks, mixing them to fit the deal size, the seller's flexibility and their own risk appetite.

SBA 7(a) loans to buy a SaaS business

For US buyers, the SBA 7(a) program is the workhorse of small-business acquisition, and it does apply to software companies. It can fund up to $5M, commonly covering 80% to 90% of the purchase price over a 10-year term, which is why so many sub-$5M SaaS deals lean on it. The trade-offs: the business must show real, documented cash flow (lenders underwrite historical earnings, not a growth story), you personally guarantee the loan, and closing takes 60 to 90 days of paperwork. A recurring-revenue SaaS with clean books and low churn is close to an ideal SBA profile, because the lender can see the debt getting serviced from predictable income.

Seller financing and why sellers agree to it

Seller financing is when the seller lets you pay part of the price over time on a promissory note, typically 10% to 30% of the deal at a negotiated interest rate. It sounds like a favor, but sellers accept it for good reasons: it signals the buyer has skin in the game, it can raise the total price they realize, and SBA lenders often require some seller note as part of the structure. For the buyer it lowers the cash needed at close and keeps the seller financially invested in a smooth transition. A seller who refuses any note at all can be a small yellow flag worth understanding.

Earnouts: bridging a disagreement on value

An earnout ties part of the price to the business hitting agreed targets after close, usually revenue or retention over the next 12 to 24 months. Use it when buyer and seller genuinely disagree about where the business is heading: the seller believes growth will continue, the buyer is not sure, so a slice of the price (often 10% to 40%) is paid only if the numbers hold. Earnouts protect the buyer from paying full price for growth that evaporates, and let the seller capture upside they believe in. They also create friction, so define the metric precisely and in writing, or the earnout period turns into an argument.

What lenders and sellers check before they fund you

Every financing source underwrites the same thing: can this business reliably produce the cash to pay everyone back. That puts the target's financials under a microscope. Lenders want two to three years of tax returns and financial statements, a clear picture of recurring revenue versus one-time income, and proof the margins survive after real costs (for AI SaaS, that means margin after inference and compute, not the vanity number before it). If the target's books are informal, a clean, lender-ready set of financial statements built from the bookkeeping export, a proper P&L, balance sheet and cash-flow statement, removes the single biggest reason financing stalls. Tidy numbers get funded; messy numbers get repriced or declined.

How much do you need to put down to buy a SaaS business?

With an SBA 7(a) loan, buyers commonly bring 10% of the purchase price in equity, and part of that can sometimes be covered by a seller note on standby, so the true out-of-pocket can be lower than it first looks. Without SBA financing, all-cash and mostly-cash deals obviously need far more. The practical answer: on a $1M SaaS bought with SBA financing, plan for roughly $100,000 of buyer equity plus closing and working-capital reserves, then layer a seller note and possibly an earnout to close the rest of the gap.

Can you get a loan to buy a SaaS company?

Yes. Profitable US SaaS companies up to $5M in price are routinely bought with SBA 7(a) loans, and larger deals use conventional acquisition debt, revenue-based financing or private credit. The gating factor is not the software label, it is verifiable cash flow: a lender funds documented, recurring earnings that can service the debt. A SaaS with clean books, low churn and margins that hold after costs is very financeable. One that depends on a single founder, a single customer, or margins that vanish after the compute bill is not, regardless of headline revenue.

Line up financing before you fall in love with a deal

The buyers who close are the ones who know their financing before they make an offer, so they can move fast when a good listing appears. Get pre-qualified with an SBA lender, know your cash ceiling, and decide in advance how much seller note or earnout you would accept. Then start from verified deal flow: browse SaaS businesses for sale with published metrics, and read our SaaS due diligence checklist so the numbers you finance against are the numbers you actually get. Buyouts lists AI SaaS with verified MRR, ARR and multiples, and closes run through escrow.