SBA loan basics
Short answer
A fixed interest rate remains the same for the entire loan term, providing predictable payments. A variable interest rate can change periodically based on a market index, leading to fluctuating monthly payments.
SBA 7(a) loans can have either fixed or variable interest rates. Variable rates are typically tied to a base rate like the Prime Rate, with an additional spread set by the lender. The SBA sets maximum allowable rates (base rate + spread) for both types.
A borrower chooses a fixed-rate loan at 7.5% and pays the same amount each month for 10 years. Another borrower chooses a variable-rate loan at Prime + 2.75%, and if the Prime Rate changes, their monthly payment will adjust accordingly.
13 CFR Part 120 — Business Loans
Office of the Federal Register · Federal regulation
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.
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