Seller financing explained: why sellers agree to wait for their money

Seller financing is when the person selling a business lends part of the purchase price to the buyer, instead of taking the full amount in cash on completion. The buyer repays it later, usually with interest, under a note the two sides agree as part of the sale. It sits alongside, not instead of, any bank debt and cash the buyer brings, and it is one of the more common ways a small business sale gets bridged between what a buyer can raise and what a seller wants for the business.

How a seller financing arrangement is usually put together

The buyer pays part of the price at completion, from their own cash, a bank loan, or both. The seller agrees to accept the remainder over an agreed term, documented as a promissory note: a principal amount, an interest rate, a repayment schedule, and what happens if a payment is missed. Repayments are typically monthly, sometimes with a larger final payment at the end of the term.

Two details decide how risky the note is for the seller. The first is priority: if the buyer also has a bank loan, the seller's note is almost always subordinated, meaning the bank gets paid first if the business runs into trouble. The second is security: whether the note is backed by a charge over the business, a personal guarantee from the buyer, or nothing beyond the buyer's promise to pay. A seller accepting a smaller amount at completion is still owed the balance regardless of how the business performs afterwards, unless the agreement says otherwise.

Why a seller would agree to wait for their money

A seller agrees to this because it can close a gap that cash alone cannot. A buyer's cash and bank financing might not stretch to the full asking price, and a seller willing to finance part of it can reach buyers who would otherwise walk away, sometimes at a higher total price than an all-cash buyer would offer. Many of the reasons owners sell also affect their appetite for this: an owner retiring on a settled timetable, with no urgent need for the full sum immediately, is in a different position from one who needs every pound or dollar at completion.

In the US, seller financing also has a tax effect. A sale with payments spread over more than one tax year generally qualifies as an installment sale under Internal Revenue Code Section 453, reported on IRS Form 6252. Rather than owing tax on the full gain in the year of sale, the seller recognises gain as each payment is received. This is the default treatment for a qualifying sale; a seller can elect out of it by the due date of that year's return if they would rather pay tax upfront. Interest on the note is taxed separately from the gain, as ordinary income.

What it means for a buyer

A buyer who cannot or does not want to fund the entire price in cash and bank debt gets access to deals that would otherwise be unaffordable. In the US, seller notes also interact directly with SBA-backed acquisition lending. For a 7(a) loan over $500,000 used to buy a business outright, the Small Business Administration requires a 10% equity injection from the buyer; for loans of $500,000 or less, the SBA no longer requires a set injection, though individual lenders can still ask for one. Part of that required injection can sometimes come from a seller note, but the SBA limits how much of the note can count and sets conditions on when the seller can actually start being repaid. These conditions have changed more than once in recent years, so a buyer relying on a seller note to help meet an SBA injection requirement should confirm the current rule with their lender rather than an older guide.

How common it is

The International Business Brokers Association and M&A Source survey business brokers and M&A advisors each quarter on completed deals in their Market Pulse report. Their Q2 2026 edition breaks down how deals under $50m in enterprise value were actually financed:

The remainder in each band went to earn-outs and equity the seller kept in the business after the sale. Seller financing is a real but modest part of deal structure across every size, and it tends to matter more at the smallest end of the market, where bank lending is harder to arrange and buyers are more sensitive to how a deal is financed.

A worked example

The figures below are an illustration built for this article, not a real transaction.

The buyer still needs the business to generate enough cash to make those monthly payments on top of running costs and any bank repayments. A lower price paid at completion does not make the remaining £150,000 disappear, and a seller who later needs that money faster than the schedule allows has limited options for getting it early.

Tax treatment: a brief, jurisdiction-specific note

In the United States, as above, a seller note usually triggers installment sale reporting under Section 453, with gain recognised as payments are received unless the seller elects out. Rules change; check the current guidance on IRS.gov or with a tax adviser before relying on this.

In the United Kingdom, deferred consideration in a business or share sale is taxed differently depending on whether the future payment is "ascertainable" or "unascertainable". HMRC's Capital Gains Manual treats an amount as ascertainable if, at the date of sale, it is already known, can be calculated, or can be established from events that have already happened, such as a fixed schedule of instalments. Where that is the case, the full figure counts as proceeds on the date of disposal for Capital Gains Tax, even though some of it has not yet been paid. Where the future amount instead depends on something that has not yet happened, HMRC treats it as unascertainable and taxes it in stages as it is realised. The distinction affects both the timing of the tax bill and, in some cases, whether relief such as Business Asset Disposal Relief applies. This is a complex area and the current HMRC guidance, or a professional adviser, should be checked before a seller agrees to any deferred structure.

What to check before you sign

• Priority. If the buyer also has bank debt, is the seller's note subordinated, and what does that mean if the business later struggles to pay both?
• Security. Is the note backed by a charge over the business, a personal guarantee from the buyer, or nothing beyond their word?
• Interest rate and term. Does the rate reflect the actual risk, and is the repayment schedule realistic against the business's own cash flow, not just the headline price?
• Default and remedies. What counts as a missed payment, is there a cure period, and what can the seller actually do if the buyer stops paying?
• Everything in writing. Verbal understandings about flexibility or early repayment are not enforceable; only the signed note is.

How the rest of the purchase is structured, as an asset sale or a share sale, also shapes what a seller note actually attaches to and what happens to it if the underlying business changes hands again before it is repaid.

What to do next

If you are a seller considering offering finance, work out the smallest amount you are willing to carry and the largest risk you are willing to accept, before a buyer proposes a structure to you. If you are a buyer, treat a seller's willingness to finance part of the price as one data point, not proof that the business is sound; the questions worth asking before any purchase still apply in full. Either way, get a lawyer in the relevant jurisdiction to draft or review the note itself, since the clauses that matter most, priority, security, default, rarely get settled well in a conversation alone. Comparing notes on structures other buyers and sellers have actually used, in the Republic of Investors community, is a reasonable way to sanity-check a proposed arrangement before you sign.

Common questions

Is seller financing the same as an earn-out? No. A seller note is a fixed obligation to repay a set amount, usually with interest, regardless of how the business performs afterwards. An earn-out makes part of the price conditional on the business hitting agreed targets after completion, so the amount actually owed can vary.

Does the seller keep any control over the business while the note is outstanding? Not automatically. Unless the note or a separate agreement gives the seller specific rights, such as information rights, a veto on major decisions, or security over business assets, the buyer runs the business as the new owner from completion. A seller relying on the business's future cash flow to be repaid may want to negotiate some of these protections in.

What happens if the buyer sells the business before the note is repaid? That depends entirely on what the note says. Some notes require the balance to be repaid in full if the business is sold or the buyer changes; others are silent, which can leave a seller exposed to a buyer's decisions years after the original sale. This should be addressed explicitly in the documents, not assumed.

Can a seller refuse to offer any financing at all? Yes. Seller financing is a negotiating position, not an obligation, and plenty of sales complete entirely in cash. A seller who refuses it simply narrows the pool of buyers who can afford the deal as structured.

Is a higher interest rate on a seller note always better for the seller? Not necessarily. A higher rate increases the return on the outstanding balance, but it also increases the buyer's monthly repayment burden, which can increase the chance of a missed payment or default. The rate, term and the buyer's actual cash flow need to be considered together, not the rate alone.