SBA loan basics
Short answer
The interest rate for an SBA 7(a) loan is determined by a base rate (like Prime Rate) plus a maximum allowable spread that the lender can charge, based on loan size and term.
The SBA sets maximum allowable interest rates that lenders can charge, which consist of an approved base rate (e.g., Prime Rate, Term SOFR) plus a maximum legal spread. Lenders often offer rates below this maximum based on their assessment of the borrower's creditworthiness, risk profile, and competitive market conditions. Larger loans or longer terms may have different maximum spreads.
For a $750,000 loan, the current Prime Rate is 8.50%. The lender might offer a rate of Prime + 2.25%, resulting in an initial rate of 10.75%. This spread is within the SBA's maximum allowable for that loan size.
Insider move
Lenders must ensure the chosen interest rate complies with SBA maximums at the time of loan authorization. They assess the borrower's credit, industry risk, and collateral to determine the appropriate spread, striving to balance risk and market competitiveness.
7(a) Loan Program — Terms, Conditions, and Eligibility
U.S. Small Business Administration · Official SBA source
SOP 50 10 - Lender and Development Company Loan Programs
7(a) Alternative Base Rate Options
Last checked 2026-06-13. Official sources control — verify before relying on any rule for a live deal.
Last reviewed 2026-06-13 · SBA sources checked through 2026-06-13. DealRoom analysis of public SBA 7(a) lending records (FY2020–present). Grounded in the current SBA rulebook; verify against the official sources above before relying on it for a live deal. Not legal, tax, or financial advice, and not an approval decision.
More on interest rates
Terms in this answer
Pre-qualify your SBA 7(a) deal
Tell us the business, the price, and where you are — we'll point you to the lenders most likely to fund a deal like yours and flag anything that trips up approval.
Free · No documents · Usually same-day