SOP 50 10 is the SBA's Standard Operating Procedure for its 7(a) and 504 loan programs: the rulebook lenders must follow for a loan to carry SBA's guaranty. It sets eligibility, the equity injection, how seller notes count, collateral and guarantee requirements, maturities, rate caps and what lenders must verify before closing. The current version is SOP 50 10 8, and SOP 50 10 8.1 changes several rules for loans from 1 October 2026. Borrowers never sign it, but it decides what a deal can look like.
- What it is
- SBA's Standard Operating Procedure for 7(a) and 504 lending
- Who must follow it
- Every SBA lender and Certified Development Company
- Current version
- SOP 50 10 8, with SOP 50 10 8.1 from 1 October 2026
- What breaking it costs
- The lender risks losing the guaranty on that loan
- How it changes
- New versions, plus policy and procedural notices between them
The rulebook behind every SBA loan
SBA does not lend the money in a 7(a) loan. A bank or other lender does, and SBA guarantees part of it. The price of that guaranty is compliance: the lender has to make, close and service the loan the way SBA's rules say. Those rules live in SOP 50 10, titled Lender and Development Company Loan Programs. The number identifies the document; the digits after it identify the version. SOP 50 10 7 and 7.1 loosened several rules; SOP 50 10 8 tightened many of them again; SOP 50 10 8.1 adjusts them further for loans from 1 October 2026.
The document has separate parts for the 7(a) program and the 504 program. Between versions, SBA amends it with policy notices and procedural notices, which is why a lender will sometimes cite a notice rather than the SOP itself. A borrower is not a party to any of it. But every SBA requirement that appears in a term sheet, a loan authorization or a closing checklist traces back here.
Lenders cannot waive an SOP requirement to win a deal. A lender that closes a loan outside the rules risks the guaranty, so it will say no instead.
The rules borrowers actually run into
Most of the SOP governs lender conduct that a borrower never sees. A handful of its rules shape nearly every deal, and they are the ones worth knowing before an offer or a letter of intent is signed.
| Topic | What SOP 50 10 8 requires | What it does to a deal |
|---|---|---|
| Equity injection | At least 10% of total project costs for a start-up or complete change of ownership | Sets the buyer's minimum cash, before any seller help |
| Seller notes | Count for up to half of the injection only on full standby for the life of the SBA loan | A paid seller note is debt and adds to debt service |
| Earnouts | Prohibited to the seller in a change of ownership SBA finances | Price disputes are bridged with notes or price, not earnouts |
| Seller's role after closing | No owner, officer or employee role; consulting for up to 12 months | Transition plans have to fit a consulting agreement |
| Business valuation | Independent valuation where the amount financed, less appraised real estate and equipment, exceeds $250,000, or the parties are related | The loan for the purchase cannot exceed the valuation |
| Guarantees | Every owner of 20% or more personally guarantees | Minority partners above that line sign too |
| Debt service coverage | At least 1.15x, and 1.0x globally including the owners | Sizes the loan against cash flow |
| Refinancing | New payment at least 10% lower; debt current for the last 12 months | Not every loan can be refinanced into SBA |
Each row has its own page. For the down payment, see how much equity you need to buy a business; for the seller note, full standby and seller notes and SBA's full-standby rule; for the seller's role, can the seller stay on; for the valuation, SBA business valuation; for guarantees, who has to guarantee an SBA loan.
Eligibility, collateral and use of proceeds
Beyond the headline rules, the SOP decides three questions that end files before they reach underwriting.
Eligibility. The business must be a for-profit operating company that meets SBA's size standards, counted together with its affiliates. Some businesses are ineligible outright, and passive businesses that only hold property qualify only under the eligible passive company rules, leasing to an operating company. The lender must also document that the borrower cannot get the same credit on reasonable terms without SBA's help: the credit elsewhere test.
Use of proceeds. SBA loan proceeds cannot fund a distribution to owners, or refinance debt that did. SBA will not refinance an active merchant cash advance or a factoring agreement. From 1 October 2026 an advance becomes eligible only once converted to a term loan that has amortized for at least 24 months with no new advance since. See refinancing existing debt with a 7(a) loan.
Collateral. SBA does not decline a loan only because collateral falls short, but the SOP requires the lender to take available collateral, and in some cases that includes real estate the owners hold personally. See will an SBA loan take my house.
What SOP 50 10 8.1 changes from 1 October 2026
SOP 50 10 8.1 governs loans numbered from 1 October 2026. Its changes fall hardest on acquisitions, which is where most borrowers meet the SOP.
| Rule | Under SOP 50 10 8 | From 1 October 2026 (SOP 50 10 8.1) |
|---|---|---|
| Coverage on a change of ownership | At least 1.15x | 1.25x on historical results |
| Financial due diligence | Not required by SBA on every deal | Required on every change of ownership |
| Quality of earnings report | Not required by SBA | Required on acquisitions of $3 million or more, excluding real estate |
| Amortization of a change-of-ownership loan | Up to 10 years for goodwill and working capital, 25 years for real estate | No more than 10 years, except the real estate share |
| Seller consulting after closing | Up to 12 months | Up to 24 months |
| Former merchant cash advances | An active advance cannot be refinanced | Eligible once a converted term loan has amortized for at least 24 months |
The coverage change is the one that reprices deals. A buyer who could borrow a given amount at 1.15x under the old rule can borrow less against the same historical earnings at 1.25x. The gap has to come from a lower price, more buyer equity or a seller note on standby. The quality of earnings requirement adds a report and its cost to larger deals; see quality of earnings for acquisition loans.
Why a rule change can reshape a deal already in motion
The SOP that applies is the one in force when SBA assigns the loan its number, not when the letter of intent was signed. A deal priced on one version and approved under the next can find its loan smaller, its seller note on different terms or its required diligence longer. Earlier rounds of changes showed the same pattern: when SOP 50 10 8 required a seller note to stay on full standby for the life of the loan before it could count as equity, seller notes that had been written to be paid had to be restructured or taken out of the equity count.
The practical defense is to structure to the stricter rule when a change is coming. A worked illustration in plain numbers: a business with historical cash available for debt service of 1,250 supports annual payments of about 1,087 at 1.15x, and 1,000 at 1.25x. A buyer who writes the letter of intent around the smaller figure is not caught out when the rule changes.
How lenders layer their own rules on top
The SOP is a floor, not the whole credit box. Lenders add their own policies, usually stricter ones, because their guaranty depends on getting the SOP right and their losses depend on getting the credit right. One lender may require more than the minimum injection, another may not count a standby note at all, another may want coverage well above SBA's minimum. Those overlays are why the same deal can be approved by one SBA lender and declined by the next, and why lender choice matters as much as the rules. See what a Preferred Lender is.
Transparent's lender book holds 278 lenders that write SBA 7(a) and 504 loans. The lender package Transparent builds, financing model, lender presentation, blind teaser and underwriting memo, is written to the SOP version the loan will be approved under, so the structure a lender sees already meets the rules it has to apply.
Common questions
- Does SOP 50 10 apply to SBA Express loans?
- Yes. SBA Express is a 7(a) delivery method governed by the same SOP, with its own limits: loans up to $500,000 and a 50% guaranty.
- Which version of the SOP applies to my loan?
- The version in effect when SBA assigns the loan number. Loans numbered from 1 October 2026 fall under SOP 50 10 8.1; earlier loans stay under the rules that applied when they were approved.
- Can a lender make an exception to the SOP?
- Not if it wants to keep the guaranty. A lender can be stricter than the SOP but not looser. A loan that breaks a rule risks a reduced or denied guaranty if it later defaults.
- Do SOP changes affect loans that have already closed?
- Generally no. A closed loan is governed by the rules under which it was made. A later change matters when that loan is refinanced, modified or assumed by a buyer.
- Where are the SBA's rate caps set?
- The SOP sets the maximum spreads: the base rate plus 6.5% for loans of $50,000 or less, plus 6% from $50,001 to $250,000, plus 4.5% from $250,001 to $350,000 and plus 3% above $350,000. See the SBA maximum interest rate.