SBA Loan Down Payment & Equity Injection: How Much You Really Need
Reviewed & current as of June 24, 2026
Only two situations require a 10% equity injection: start-ups and complete ownership changes. Here's exactly how the math works, when seller financing can count, and how partial buyouts may qualify for less.
SBA loans require a 10% equity injection in exactly two situations: you're a start-up (one year or less in operation), or you're buying a business in a complete change of ownership. Outside those two triggers, there's no SBA-mandated down payment. And even within them, seller financing on standby can cover up to half the requirement.
What "equity injection" actually means
Equity injection is the SBA's term for the portion of the project you fund yourself, separate from the SBA loan. Think of it like a down payment on a house: the lender is covering most of the purchase, but you have to have skin in the game.
Under SOP 50 10 8 (effective June 1, 2025), the injection amount is measured as a percentage of total project costs, not just the loan amount. If you are buying a business for $500,000 with $50,000 in closing costs, the total project is $550,000. A 10% injection on that deal is $55,000.
Acceptable forms vary by lender, but typically include cash from business or personal accounts, equity rolled in from another sale, and seller financing under specific conditions covered below.
The 10% rule: exactly when it applies
The SBA's 10% equity injection requirement is not universal. It kicks in under two conditions, and two conditions only (as of June 1, 2025, under SOP 50 10 8):
- Start-ups: Any business that has been in operation for one year or less at the time of application.
- Complete changes of ownership: Transactions where the existing ownership is fully transferred to new buyers.
If you are an established business borrowing to expand, buy equipment, or refinance, you do not automatically face a 10% injection requirement. Your lender may still ask for one based on their own underwriting standards, but the SBA is not mandating it.
A concrete example: a dentist buying out a retiring competitor's practice is a complete change of ownership. The dentist needs to inject at least 10% of the total project cost. If instead the dentist's existing three-person partnership is buying out one retiring partner while the other two stay on, that may qualify as a partial change of ownership, which carries different rules (see below).
Rules change. Confirm current requirements with your lender and SBA notices before you finalize your financing structure.
How seller financing can cover part of it
If the seller is willing to take back a note, that seller debt can count toward your equity injection, but only under strict conditions set by SOP 50 10 8:
- The seller note must be on full standby for the entire life of the SBA loan. Full standby means no principal payments and no interest payments during that period. Not "interest only." Not "deferred for 12 months." Nothing.
- Seller debt counts toward the injection only up to half of the required amount. On a 10% requirement, that means seller financing can cover at most 5% of total project costs. You still have to bring the other 5% in real cash or eligible assets.
So if your project costs $1,000,000, the injection requirement is $100,000. A seller willing to carry $50,000 on full standby can cover half. You bring $50,000 in cash, and the 10% is met.
Most sellers balk at full standby because they collect nothing until your SBA loan is paid off. But for a motivated seller with no other buyers, it can close deals that would otherwise fall apart.
When the 10% can be lower: partial buyouts
Partial changes of ownership, such as a partner buyout where someone else stays on and runs the business, can fall below the 10% injection threshold. To qualify for a lower injection under SOP 50 10 8, the remaining owner must certify both of the following:
- 24 months or more of active ownership at the same stake or a higher one, immediately before the buyout.
- A business debt-to-worth ratio no worse than 9 to 1 after the transaction closes.
If both conditions are met, the lender has flexibility to structure the injection below 10%. If either condition fails, the deal falls back to the full 10% rule.
The key distinction in the paperwork is always "complete" versus "partial." If your purchase agreement describes a complete transfer of ownership, expect the 10% floor. Mislabeling a complete buyout as partial will flag during underwriting.
What counts as your injection and how lenders verify it
Lenders have to document where your equity injection is coming from. The SBA requires them to source and verify the funds before closing. Common acceptable sources:
- Cash from a personal or business account. Bank statements covering 2-3 months show the funds are seasoned and yours.
- Proceeds from another asset sale. A settlement, retirement distribution, or real estate sale can count with documentation.
- Gift funds from a family member. Accepted with a gift letter and evidence the transfer happened.
- Seller financing on full standby, as described above.
What does not count: borrowed funds you have to repay (a personal loan, a credit card advance) and any seller debt that is not on full standby.
Lenders typically ask for bank statements, a personal financial statement (SBA Form 413), and a signed source-of-funds letter for money coming from outside your primary accounts.
For a full list of what lenders ask for at application, see our SBA loan document checklist. To see how equity injection fits among all the other eligibility boxes, the SBA loan requirements overview covers citizenship, personal guarantee, business age, and size standards in one place. And if you want to understand the personal guarantee that goes alongside your injection, SBA loan collateral and personal guarantees covers what you're signing when you put skin in the game.
To see which SBA program structure makes sense for your project before you stress about the down payment, the comparison in SBA 7(a) vs 504 loans shows how each handles equity and use of proceeds.
Not every lender interprets equity injection the same way. Find a lender in your state that actively writes SBA loans in your deal type, because an experienced SBA lender will know which sources they can accept and how to structure it cleanly.
If you want to know where your full application stands before you get to the equity injection conversation, a readiness check will show you which boxes you already clear and which ones to fix first.