Commercial Debt & Alternative FinancingExplainer4 min readUpdated September 2026

Buying a Business With an SBA Loan: Down Payment Rules

Buying a business with an SBA 7(a) loan usually means putting in your own cash, called an equity injection, and the SBA's rules have generally set the floor at ten percent of the total project cost for a change of ownership. Your lender can require more, and SBA revises its rulebook, so confirm the current figure before you sign a letter of intent.

The number that surprises most buyers isn't the percentage. It's the base it's applied to. Project cost includes more than the purchase price, and what you're allowed to count toward the injection is narrower than most people expect. This guide covers both, plus how to structure a seller note and document your funds.

Vendors Covered in this Article

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

How much of your own money does an SBA business purchase require?

The equity injection is a percentage of total project cost, not of the price on the letter of intent. Project cost typically includes the purchase price, closing and legal costs, any working capital you're financing and sometimes fees rolled into the loan.

For example, say you're buying a business for 1,000,000, with 30,000 of closing costs and 70,000 of working capital in the loan. Project cost is 1,100,000, and a ten percent injection is 110,000, not the 100,000 you'd get from the price alone. Lenders can also ask for more when the business is thinly capitalized, the industry is volatile or the buyer has no experience in the field.

Budget for cash beyond the injection as well. Post-closing reserves, your own living expenses during the first months and any third-party costs the lender doesn't finance all come from somewhere else. A buyer who spends every dollar on the injection has no runway if the first quarter is slow.

What counts toward the equity injection?

The rules on this are specific, and they change. Ask your lender to list what it accepts, using questions like these:

  • Cash from your own savings, documented with statements.
  • Proceeds from selling personal assets, such as a home or investments, with closing documents.
  • Gift funds, if the donor provides a signed gift letter and the lender accepts the source.
  • A seller note on full standby, which means no payments on the note for the life of the SBA loan, and which the SBA generally limits to part of the required injection.
  • Borrowed money for the injection, which gets extra scrutiny, and lenders often want repayment from income outside the business.

What doesn't count is just as important. A seller note that pays you monthly reduces the business's cash flow and generally can't be counted as your equity. Money you move in from the business you're buying doesn't count either.

How to structure a deal with a seller standby note

A standby note lets the seller finance part of your injection, which shrinks the cash you need on closing day. The trade-off is that the seller waits, potentially for the full loan term, to see that money.

Say the required injection is 110,000 and your lender allows a standby note to cover up to half of it. You'd put in 55,000 in cash, and the seller would carry a 55,000 note that receives no payments while the SBA loan is outstanding. That works only if the seller trusts the business to survive, so expect the conversation to turn on transition support, price and security.

Two cautions. First, because the note doesn't pay during the standby period, sellers often ask for a higher price to compensate, and that can push your DSCR down. Check the coverage math with the SBA 7(a) loan payment calculator before agreeing. Second, put the standby terms in the letter of intent, so the seller isn't surprised when the lender's counsel drafts the subordination agreement.

How to document where your down payment came from

Lenders trace the source of every dollar, so start early:

  1. Gather two to three months of statements for every account holding funds you'll use.
  2. Write a one-line explanation for any deposit that isn't payroll or a normal transfer between your own accounts.
  3. Keep the documents for asset sales, gifts, or withdrawals from retirement accounts, including tax consequences if you'll owe tax on the withdrawal.
  4. Don't move large sums between accounts in the weeks before closing without a paper trail.
  5. Hold the earnest money receipt and confirm the lender will credit it toward the injection.

The SBA 7(a) requirements checklist lists the other documents the lender will expect alongside these.

Which mistakes derail SBA acquisition deals?

These are the ones that cost buyers time or the deal itself:

  • Treating the injection as the only cash you need, then running out of money on closing costs or the first payroll.
  • Agreeing to a price the business's cash flow can't support once the SBA loan payment is counted.
  • Counting a seller note as equity before the lender confirms it qualifies.
  • Overlooking that owners of a significant share of the business are typically asked to sign a personal guarantee; read SBA personal guarantee explained first.
  • Waiting until after signing the letter of intent to talk to a lender.

If you're still looking for a target, a marketplace for online and small businesses can widen the search, but the lender's rules on equity, guarantees and valuation apply to any target you find. Check with your lender and an attorney on both the structure and the current SBA requirements.

Executive Capability Standard

What Good Looks Like

Before you make an offer, you know your total project cost, the cash the lender will accept as equity, and where every dollar of it came from.

Building The Capability (5-Stage Skill Ladder)

1. Learn:Learn how project cost is built and which sources of funds a lender accepts for the injection.
2. Do Manually:Build a sources-and-uses table for the deal, with the injection, seller note and SBA loan in separate lines.
3. Delegate:Ask an SBA-experienced lender, a CPA and a deal attorney to review the structure before you sign a letter of intent.
4. Automate:Keep a running funds-tracing folder with statements and explanations so each new deal starts from a documented base.
5. Buy:Use an acquisition marketplace to source targets, then have your lender vet each one before you spend money on diligence.

How to Get Started

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

Frequently Asked Questions

How much down payment do you need to buy a business with an SBA loan?

SBA's rules have generally set a minimum equity injection of about ten percent of total project cost for a change of ownership, and lenders can ask for more. Confirm the current requirement with your lender, since SBA updates its procedures.

Can a seller note count as part of the SBA equity injection?

Sometimes. A seller note generally counts only when it's on full standby for the life of the SBA loan, and SBA limits how much of the injection it can cover. A note that makes regular payments usually doesn't count as your equity.

Can I borrow the down payment for an SBA business purchase?

It's possible in some cases, but lenders look closely at it. They'll want to know how the borrowed money will be repaid, and they often prefer repayment from income outside the business. Ask before you take on the loan.

Does the equity injection include working capital and closing costs?

The percentage is applied to total project cost, which usually includes closing costs and financed working capital as well as the price. That's why your injection is typically larger than the same percentage of the purchase price alone.

About the numbers

This guide doesn't quote a sourced benchmark. Figures in it are estimates or general guidance, so check them against your own numbers.

Related Guides