The SBA Loan Underwriting Process, Step by Step

The big picture

SBA lenders follow a rulebook, SOP 50 10, and for business purchases a dedicated appendix sets out what the lender must analyze and document. The current version, 8.1, took effect October 1, 2026. Within those rules, each lender also applies its own credit policy. Underwriting is the process of testing your request against both, and it ends in a credit memorandum that the lender’s approvers sign off on.

The steps below follow a typical acquisition loan. Expansion and real estate loans follow a similar path with different emphasis. For how long each stage tends to take, see how long an SBA loan takes to close.

Step 1: Screening and eligibility

Before spending time on the numbers, the lender checks whether the deal can be an SBA loan at all:

• Business eligibility: an operating, for-profit business, small under SBA size standards, in an eligible industry.
• Owner eligibility: under the current rules, SBA financing is limited to businesses whose direct and indirect owners and required guarantors are all U.S. citizens or U.S. nationals with their principal residence in the United States.
• Franchise check: if the business is a franchise, the brand must be on the SBA Franchise Directory. See buying an existing franchise.
• Transaction type: for a purchase, which change-of-ownership category it falls into (initial acquisition, business expansion, owner buyout, ESOP or cooperative). The category sets the equity, coverage and diligence rules.

Many deals that fail late could have been screened out here.

Step 2: Collecting and verifying the documents

You provide personal and business information; the seller provides the target’s financials. Typical items are in documents for an SBA loan. Two points specific to underwriting:

• Tax transcripts. The lender verifies the seller’s tax returns against IRS transcripts. Numbers that don’t match will stop the file.
• Personal financial statements. Guarantors provide a personal financial statement dated within 90 days of approval; see personal financial statement.

Step 3: Spreading the financials

The analyst “spreads” the statements: puts several years side by side in a standard format. For an acquisition, the analysis is based on the target’s three most recent year-ends, using the highest level of financial reporting available (audited, reviewed, compiled, or tax returns), plus the most recent interim statement compared with the same period a year earlier. Trends matter: a business that’s slipping this year will get questions even if the last full year was strong.

Step 4: Cash flow and coverage

This is the heart of it. The lender:

1. Starts from historical earnings (EBITDA) and makes adjustments it can justify: owner compensation, unfunded capital spending, non-recurring items, seller discretionary expenses.
2. Divides by the total debt service after the deal, including any seller debt that isn’t on full standby.
3. Compares the result to the minimum for the transaction type. For an initial acquisition, the SBA minimum is 1.25 to 1; for a business expansion, 1.15 to 1. Lenders may set their own targets higher.
4. Runs a global cash-flow analysis covering the owners’ household income, debts and living costs, which must show at least 1 to 1 coverage.

The lender reviews your projections but can’t rely on them to meet the coverage requirement for a purchase. How lenders calculate cash flow walks through the method with an example, and DSCR in plain English explains the ratio.

Step 5: Valuation and diligence reports

For a purchase, the lender orders an independent business valuation, and for larger initial acquisitions and expansions a quality-of-earnings report as well; real estate gets its own appraisal and often an environmental review. These reports can change the deal: the debt is capped at the valuation, and QoE findings feed the coverage calculation. See how to value a business for an SBA loan. The lender also documents a site visit to the business.

Step 6: Equity, collateral and guaranties

• Equity injection: the amount, the source, and the documents proving it. See equity injection and seller notes.
• Collateral: the lender identifies available business assets and, if the loan isn’t fully secured by them, other available collateral, which can include personal real estate.
• Guaranties: owners of 20% or more give unlimited personal guaranties; others may be asked for one.
• Insurance: the memo addresses hazard and liability insurance, and life insurance on key people or the reason it isn’t required.

Step 7: The credit memo and approval

The analyst writes it up. For a change of ownership, the memo must describe the business, its history and industry, the buyer’s experience and how the business will be managed day to day, the full financial analysis, working-capital adequacy for at least the next year, collateral, insurance, and why the lender recommends approval, including why the borrower doesn’t have credit available elsewhere on reasonable terms.

Then it goes to the lender’s approvers. Lenders with delegated (Preferred Lender) authority can approve the SBA guaranty themselves. Others submit the application to the SBA’s processing center, which reviews it before issuing its decision.

Step 8: Commitment, closing and funding

Approval becomes a commitment letter with conditions: the purchase agreement, lease assignment, license transfers, insurance, equity verification, and the SBA’s loan authorization. Attorneys prepare the documents, conditions are cleared, and the loan funds at closing. Our guide to preparing a lender-ready loan request shows how to set up a file that moves through these steps with fewer questions.

If you’re about to apply, tell us about the deal. We’ll show you where an underwriter is likely to push, before one does.