The SBA calls it an equity injection rather than a down payment, and the distinction matters: the rule is about how much of the total project you fund yourself, from sources the SBA recognizes as equity, not about a percentage of the loan. This guide sets out the current minimums for 7(a) and 504 loans, what counts, how the lender verifies it, and what changes when SOP 50 10 8.1 takes effect on October 1, 2026.
7(a): a minimum in two situations, lender discretion everywhere else
SOP 50 10 8 requires a minimum injection for exactly two kinds of 7(a) loans:
- Startups. A business that has been generating revenue from its intended operations for one year or less must inject at least 10% of total project cost, defined as all costs required to become operational regardless of who funds them, excluding lines of credit and 504 loans. Loans approved more than 90 days apart count as separate projects.
- Complete changes of ownership. Buying a business from an unrelated seller requires at least 10% of total project cost, meaning all costs required to complete the purchase.
Outside those cases the SBA sets no percentage. The lender must still determine that the business has “sufficient invested equity” for its type, management, and market, and document that judgment in its credit memo, so a lender can require an injection on an equipment or working-capital loan, but the SBA does not. For SBA Express loans the decision on whether to require any injection is left entirely to the lender.
Two carve-outs in the current SOP: an ESOP buying a controlling interest of at least 51% in its employer needs no injection, and when an existing business buys or opens another business in the same six-digit NAICS code, with identical ownership, in the same geographic area, and the two are co-borrowers, the SBA treats it as an expansion and requires no minimum injection. Partner buyouts financed above 90% of the purchase price carry their own tests, covered in SBA loans to buy a business.
What counts as equity, and what does not
The SOP lists the acceptable sources. Cash that is not borrowed, on the business’s balance sheet or from any other source. Cash from a personal loan, if repayment can be shown to come from a source other than the business’s cash flow; the owner’s salary from the business does not qualify. Grants with no repayment or clawback provision during the life of the loan. Assets other than cash, with an independent appraisal if valued above net book value. Prepaid expenses the lender has verified with paid invoices, canceled checks, or bank statements.
Seller debt is the one everyone asks about. It counts only if it is on full standby, no payments of principal or interest for the term of the SBA loan, documented on SBA Form 155 or the lender’s equivalent with the note attached, and even then it may cover no more than half of the required injection. Interest may accrue and be paid after the SBA loan is retired, and the standby creditor must subordinate any lien and take no action against the borrower without the lender’s consent. A seller note being paid monthly is simply debt, not equity.
Verification
Outside of SBA Express and Export Express, the lender must verify the required injection before disbursing any proceeds and keep the evidence in the file; a lender that fails to do so risks a repair or denial of the guarantee later. Expect to show where the cash came from and to be asked about any borrowed component, including its repayment terms and any standby or subordination agreement. Express lenders that verify injections on their comparable non-SBA loans must do the same on their Express loans.
504: fixed tiers set by regulation
The 504 contribution is set in 13 CFR 120.910 as a share of project cost, excluding administrative costs:
| Situation | Minimum borrower contribution |
|---|---|
| Standard project | 10% |
| Business has operated two years or less | 15% |
| Limited or single-purpose building | 15% |
| Both of the above | 20% |
The contribution can be cash, property bought with cash, or land that is part of the project, and it may come from any source except another SBA business loan. The rest of a standard project is a bank first lien for roughly 50% and a CDC/SBA debenture for up to 40% under 13 CFR 120.801; the higher borrower tiers reduce the debenture share. The structure is explained in the 504 loan explained, and the eligibility side, including what makes a property special-purpose, in 504 loan requirements.
What changes on October 1, 2026
SOP 50 10 8.1 moves all 7(a) change-of-ownership rules into a new appendix and sorts transactions into four categories. The minimum injection stays at 10% for each, but the treatment differs:
- Initial acquisition, a new majority owner with no prior stake or employment in the business: 10% of total project cost, and the requirement “cannot be reduced or eliminated.”
- Business expansion, owner buyout, and ESOP or cooperative transactions: 10%, but the lender may reduce or eliminate it when the applicant’s balance sheet showed no negative net worth at the last fiscal year-end, with a bar on adding permanent working capital to the loan for 90 days.
- Limited sources, including standby seller debt and certain non-controlling minority investments, may together supply no more than half of the requirement, and a standby lender may not take an equity stake.
- Real estate bought as part of an acquisition is subject to the same injection, allocated pro rata if the deal is split into two loans.
- Where the purchase price exceeds the value supported by the business valuation or the new Quality of Earnings report, the difference must be made up with equity, on full standby if it comes from a limited source.
The startup rule is unchanged at 10% of total project cost. Deals in process now should confirm with the lender which SOP will govern, since the applicable version is the one in effect when the SBA issues the loan number.
What the record says about who puts money in
The SBA’s public loan record does not report the injection on each loan, so we cannot publish an average down payment and will not estimate one. It does show the projects the rule touches most. Loans to startups and businesses two years old or younger number 265,843 since fiscal year 2010, with an average loan of $451,924; at the 10% minimum, a project of that size implies roughly $45,000 of applicant equity before the lender’s own requirements. Loans for a change of ownership number 50,580 with an average of $1,077,318, which is why the acquisition rules draw the most attention. Both figures are on the startups and buying a business pages, with the lenders most active in each.
Planning the injection
Count only sources the SOP recognizes, keep the paper trail the lender will need, and size the project from the equity you actually have: $50,000 of qualifying equity supports a $500,000 startup or acquisition project at the minimum, and a lender may want more. If the money is going into a building, compare the 504 tiers with the 7(a) route, because a 504 loan on a standard property from an established business needs only 10% with a fixed rate on the SBA portion. Model the payment on the SBA loan calculator or the 504 calculator, and see how much you can borrow for the cash-flow test that sits alongside the equity rule. Injection requirements follow the SOP in effect when the loan number is issued; confirm the figure with a participating lender.