One kind of borrowed money can fund your SBA down payment. The rules say exactly which, and how.
Lenders trace every dollar of the equity injection back to where it came from, and most borrowed dollars fail that trace three days before closing. One class of borrowed money counts in full, three other sources share a hard cap of half, and the difference is documentation you can start assembling today.
Free 30 minutes. Bring where the down payment is coming from, and leave knowing what a lender will say to each piece. Reviewed against the September 2026 rules.
The injection is 10% of the project, and every dollar gets traced
Start with the number itself, because it is bigger than most buyers plan for. The equity injection on an SBA change of ownership is 10% of the total project cost, which is the purchase price plus everything else the loan finances: working capital, closing costs, and the fees. For a first-time purchase that 10% cannot be reduced or eliminated. How much cash it takes to buy a business walks the whole number; this page is about one question inside it, which dollars are allowed to be someone else's first.
The reason the question matters is sourcing. The lender does not take the injection on faith. It traces each dollar to its origin and asks whether that origin is allowed, and it runs the trace late in underwriting, when the diligence money is already spent. Money borrowed against the business you are buying, or against the deal itself, fails. A credit line draw fails. A sudden undocumented deposit fails. This is the classic quiet deal-breaker, and it is entirely avoidable, because the rules on what counts are specific and public, set out in the SBA's own lending SOP, SOP 50 10.
Within those rules, the allowed sources split into two groups that behave very differently: money the SBA counts in full, and money it counts only up to a shared cap. Borrowed funds appear in both groups, which is why one buyer's loan sails through sourcing and another's sinks the file.
A personal loan counts in full, if the payments come from outside the business
Here is the exception buyers keep missing, often because someone told them flatly that borrowed money never counts. A personal loan to you as a guarantor counts toward the injection without a cap, on one condition: you can show that the loan payments come from a source other than the business's cash flow. A spouse's salary. Your own continuing outside income. Investment income. Anything real and documentable, as long as it is not the business you are buying paying you a salary that then services the loan, because that is the business funding its own down payment with extra steps, and underwriters are paid to notice.
This is also the honest answer to the home equity question. A loan against your house is a personal loan to you, not money borrowed against the business or the deal, so it can fund the injection. It faces the same repayment-source test as any other personal loan, and it deserves the same sober second look you would give any decision that puts your home behind a business purchase. The rule makes it possible. Whether it is wise is a judgment about your own risk, and it belongs in daylight, not in a closing-week scramble.
Whichever personal loan you use, build the file before you are asked for it: the loan agreement, the account trail showing where the money landed, and the pay stubs or statements proving the outside income that services it. Sourcing problems are rarely about the money being wrong. They are about the paper arriving late.
Three sources share one cap: no more than half of the injection
The second group is where most creative structures live, and it carries a ceiling. Standby debt, seller debt on full standby, and non-controlling minority equity may together provide no more than half of the required injection. The cap is shared across all three, not granted to each, so a seller note covering half already uses the whole allowance, and the other half of the injection has to come from the full-strength sources: your own seasoned cash, a documented gift, or the personal-loan route above.
The phrase doing the heavy lifting is full standby, and it means exactly what it says: no payments of principal or interest for the whole term of the SBA loan. Not a pause for the first two years, not interest-only until things settle. Nothing, until the SBA loan is gone. A note that pays the seller anything along the way is not on full standby and counts toward the injection not at half strength but at zero. The wording that gets this right or wrong is one paragraph, and the seller note rules walk it line by line.
One more line worth knowing in this group: money from a minority investor who does not control the company sits under the same shared cap. Bringing in a passive partner for 30% of the injection is legal and common, but it spends the same allowance the seller note wanted, and the arithmetic of who covers what is worth doing before the offer letter, not after. It is exactly the kind of structure worth settling before you sign an LOI, while every term is still cheap to change.
Which rulebook governs your loan, and what tightens October 1
The SBA's lending rulebook is mid-handover, and the date that decides which version applies to you is set. SOP 50 10 8 governs applications submitted through September 30, 2026. SOP 50 10 8.1 applies to loans numbered on or after October 1, 2026, and its purchase-lending rules live in its Appendix 15. If your deal is in flight across the boundary, ask your lender which side your file lands on rather than assuming.
For the injection itself, the structure described on this page carries across the handover: 10% of the total project, the capped group capped at half, full standby meaning the whole term. The change a buyer actually feels sits next to the injection, in coverage. For a first-time purchase, loans numbered from October 1, 2026 must show 1.25x debt service coverage on last year's actual results, the SBA's own floor, where most lenders already were. The lender reviews projections but may not rely on them to meet the requirement, so the earnings that clear the bar have to be the ones that already happened.
Put together, the two rules point the same direction: the deal has to hold up on documented reality, both where the down payment came from and what the business already earns. Buyers who assemble that evidence before underwriting asks are not lucky. They are early.
Can borrowed funds count as the equity injection under SOP 50 10 8?
Can I use a home equity loan or HELOC for the SBA down payment?
How much of the SBA equity injection can a seller note cover?
Does SOP 50 10 8.1 change the equity injection on October 1, 2026?
How much cash it takes
The injection is 10% of more than the price. What the total project really includes, and the four sources lenders accept.
The capped routeThe seller note rules
Why banks like seller financing, how full standby counts toward the down payment, and the one paragraph that decides it.
Know where every dollar of your injection is coming from?
Thirty minutes, free and confidential. Bring the pieces of your down payment, your own cash, the note you are negotiating, the loan you are considering, and we will tell you which dollars a lender will count, which are capped, and what paper each one needs. We do not originate, broker or refer loans, so there is nothing to sell you at the end of it.
Walk your injection plan throughPrefer to poke at it yourself first? The free toolbox sizes a deal against your savings, no sign-up.
No obligation. hello@clariqadvisory.com