Most people walk into a partner buyout assuming they'll need to write a check for at least 10% of the deal. That assumption is often wrong — and the difference can be six figures of cash they get to keep in the business.
The SBA's standard equity injection rule gets all the attention. The exception buried a few paragraphs later almost never does. Let's fix that.
What is the standard SBA equity injection requirement, and why does it exist?
For most SBA 7(a) loans, the agency requires the borrower to inject at least 10% of the total project cost in equity before the loan closes. The logic is simple: the SBA and the lender want the borrower to have meaningful skin in the game, so they're not walking away from a business they barely paid into.
For a business acquisition, that 10% typically comes from the buyer's own cash or equity — not seller financing, not gifts, not the business's own working capital. It has to be cash in from an acceptable source.
On a $1,000,000 buyout, that's $100,000 out of the buyer's pocket before the deal closes.
What is the 9:1 debt-to-worth exception for partner buyouts?
The 9:1 exception says that if the business's post-closing debt-to-worth (also called debt-to-equity) ratio is 9:1 or better, the SBA will waive the equity injection requirement entirely. Zero down. No 10% check.
The rule lives in SBA SOP 50 10 8 under the change of ownership provisions. The underlying policy rationale is that when a business already carries limited leverage relative to its equity base, adding more debt doesn't create the same risk profile as a highly leveraged acquisition of an external target — the equity cushion is already there.
This is specifically available for partial change of ownership transactions — meaning one or more existing owners buying out the interest of a departing partner or co-owner — not arm's-length third-party acquisitions.
How does the 9:1 debt-to-worth ratio actually get calculated?
The ratio is calculated on a post-closing, pro forma basis. That means you're looking at what the balance sheet looks like after the loan funds and the buyout completes — not where it stands today.
Here's the basic math:
- Total liabilities (all debt, including the new SBA loan) ÷ Tangible net worth (total equity minus intangibles and goodwill)
- If that number is 9 or less, the exception applies
A few things that trip people up in practice:
- Goodwill matters. If the buyout purchase price includes significant goodwill, that goodwill gets added to the asset side of the balance sheet — but it also gets subtracted from net worth in the tangible net worth calculation. Deals heavy in goodwill can blow up the ratio fast.
- All liabilities count. Existing term debt, lines of credit, equipment loans, seller notes — every dollar on the liability side of the post-closing balance sheet goes into the numerator.
- The pro forma has to be supportable. You can't just model around the threshold. Lenders underwriting to SBA standards will build the pro forma themselves and verify it against the real numbers.
Run the calculation before you structure the deal, not after. I've seen transactions where a simple adjustment to seller note terms — moving a short-term note to a longer amortization — changed the post-closing current liabilities enough to move the ratio inside 9:1. Small tweaks, real money.
Does this exception apply to all SBA programs, or just 7(a)?
This exception applies specifically to SBA 7(a) loans, which is the right vehicle for most partner buyouts anyway. The 504 program is designed for fixed-asset financing (real estate, heavy equipment) and isn't typically used for partner buyout transactions. SBA Express loans follow 7(a) rules but come with lower loan limits ($500,000 maximum) and lender-specific overlays that can tighten injection requirements regardless of the SOP baseline.
If your buyout involves a real estate component — say, one partner owns the building the business operates out of and that's part of what's being acquired — you may be looking at a more complex structure. In those cases, get with a broker or lender early to map out whether 7(a) alone handles the whole transaction or whether there's a 504 piece layered in.
What does the lender still look at even if injection is waived?
Waiving the injection requirement doesn't mean the lender stops caring about the deal's financial health. The underwriting checklist still runs in full:
- Debt service coverage. Most SBA lenders want to see a global DSCR of at least 1.25x — meaning the business generates $1.25 in cash flow for every $1.00 of annual debt service, including the new loan. Some lenders hold to 1.15x; most hold to 1.25x or higher.
- Business performance. Two to three years of business tax returns are standard. A company that's been declining in revenue isn't going to get a pass because the ratio math works.
- Creditworthiness of the buying partner. Personal credit, personal financial statement, any outstanding personal liabilities. The SBA requires a personal guarantee from all owners of 20% or more.
- Valuation of the departing partner's interest. The lender needs to confirm the purchase price is supportable. For most partner buyouts, this means a third-party business valuation when the loan amount exceeds $250,000 (check current SOP thresholds with your lender, as these rules have evolved).
- Use of proceeds clarity. The loan has to go to the buyout. Working capital, equipment refreshes, and other uses can sometimes be bundled, but each gets its own scrutiny.
What documents does the buying partner need to prepare?
Getting ahead of the document request speeds up underwriting considerably. Standard asks for a partner buyout using this exception include:
- Three years of business tax returns (federal, all entities)
- Three years of personal tax returns for all guarantors
- A current personal financial statement (SBA Form 413)
- Year-to-date profit and loss statement and balance sheet, dated within 90–120 days of application
- A copy of the existing partnership or operating agreement, including any buy-sell provisions
- The buyout purchase agreement or term sheet
- Third-party business valuation (if required based on loan size)
- Pro forma post-closing balance sheet showing the 9:1 calculation
The most common miss I see is incomplete entity documents — the operating agreement is outdated, the buy-sell provisions don't match the actual deal structure, or there's no clear trail showing how the departing partner's ownership percentage was established. Get that paperwork current before you go to a lender.
When does the exception NOT apply?
Even if the ratio math clears 9:1, a few scenarios can take the exception off the table:
- The transaction is structured as a third-party acquisition, not a partner buyout among existing owners. If you're a new buyer purchasing a departing owner's interest from the outside, the standard 10% injection requirement applies.
- The lender has an overlay requiring injection regardless of SOP minimums. Preferred Lender Program (PLP) lenders have more latitude on SOP interpretation — and more latitude means some of them use it to require more, not less.
- Post-closing cash flow doesn't support the debt load at any injection level. The ratio test is a necessary condition, not a sufficient one.
- The business has substantial contingent liabilities (pending litigation, disputed tax obligations) that would reasonably appear on a post-closing balance sheet.
How does this change the deal conversation with your partner?
Practically, waiving the injection means the buying partner isn't forced to drain personal savings or liquidate investments to close the deal. The business's own equity base is doing the work that the cash injection would have done.
That changes the negotiation, too. A buyer who doesn't need to bring $100,000+ to the table has more flexibility on purchase price, seller note terms, and transition arrangements. The departing partner often gets a cleaner exit because the financing isn't contingent on the buyer scraping together funds.
If you're a CPA or attorney advising business owners on partnership succession, this exception is worth knowing cold. It's one of those SBA rules that sounds narrow but comes up regularly in closely held businesses — and most owners don't know it exists until someone tells them.