Equity injection: the 10% rule and how to meet it

Why lenders require it, and what it's actually calculated against

Equity injection is the SBA's basic risk-alignment mechanism, not a formality. Every SBA 7(a) change-of-ownership loan requires a minimum 10% injection from the buyer, calculated against total project cost (purchase price, plus closing costs, plus any working capital or other costs rolled into the loan), not just against the purchase price alone (see the SBA 7(a) basics guide for how total project cost is built up). A buyer with real money on the line has real reason to make the deal work after close. For a first-time acquisition (what SBA calls an Initial Acquisition), the lender can't reduce or waive the 10%.

A quick example: on a $1M purchase price with $50k of closing costs and $50k of working capital rolled into the loan, total project cost is $1.1M, and the 10% floor is $110k, not $100k. Buyers who mentally size their injection off the purchase price alone are consistently short of what the lender actually requires.

Full-standby seller notes counting toward the 10%, and the cap

Under SBA's current rules (SOP 50 10 8.1, effective October 1, 2026, which kept the rule SOP 50 10 8 introduced in June 2025), a seller note only counts toward your required equity injection if it's on full standby, meaning no principal or interest payments of any kind, for the entire term of the SBA loan. Even when it qualifies, it can only cover up to half of the minimum 10% injection, and that half is shared with the other limited sources, such as other standby debt and minority investors who hold less than 20%. The rest still has to come from the buyer's own sources.

That full-loan-term standby condition is a tough ask for sellers who want at least some cash flow from their note early on, which is why the two-note structure has become the common workaround. One note, fully standby for the life of the SBA loan, counts toward the equity injection. A second, separate note carries a shorter standby period, or none at all, and sits entirely outside the equity calculation, giving the seller some near-term cash flow without disqualifying the first note. The second note is ordinary debt, though: its payments count against your debt service coverage, and all of the deal's debt together, that note included, can't exceed the business valuation. A seller note can be refinanced once it has been in place and current for 36 months.

The subordination itself isn't informal. It goes through the SBA's Form 155 standby creditor's agreement, and your lender will require the note terms in writing before crediting it against your injection. See the diligence guide on seller financing terms for exactly what to check in that agreement.

Other sources: what actually counts as your own money

Personal savings and liquid assets are the simplest source. Lenders want to see the funds seasoned, sitting in your account long enough (typically around two months) with a clear paper trail, so they can't be mistaken for an undisclosed loan.

Gift funds from a family member are allowed, but the lender will want a signed gift letter confirming it's a true gift with no expectation of repayment. An undocumented gift can read as an undisclosed loan and get flagged during underwriting.

A ROBS (Rollover for Business Startups) arrangement lets you roll retirement funds (a 401(k) or IRA) into the acquiring entity without triggering the early-withdrawal penalty, by having your new company sponsor a retirement plan that then buys stock in the business. It's a legitimate, common source for career-changer buyers, but it comes with real ongoing compliance obligations, plan administration and annual filings, that outlast the closing.

Borrowed money counts only in a narrow case. A personal loan to you, such as a HELOC, can count toward the injection only if you can show it will be repaid from something other than the business's cash flow, and the salary the business pays you doesn't qualify. Expect the lender to look hard at any borrowed funds, and confirm with your specific lender before counting on them.

The common mistake: assuming a seller note solves the whole injection

The single most common equity-injection mistake buyers make is treating a seller's general willingness to "carry some paper" as solving the injection requirement outright. Given the cap at half of the 10% and the full-standby condition, a $100k required injection on a $1M deal can have at most $50k covered by a qualifying seller note. The other $50k still has to come from cash, gift funds, ROBS, or another source.

Get this sourcing plan nailed down before you're negotiating an LOI, not after. See the lender pre-qualification guide for getting it confirmed by an actual lender early, so you're not scrambling to find cash once you're already under contract.