SBA loan basics
Short answer
A 'fixed' interest rate stays the same throughout the life of the loan, while a 'variable' interest rate can change over time based on an underlying economic index.
With a fixed rate, your monthly interest payment remains constant, providing predictability. A variable rate, often tied to an index like the Prime Rate, fluctuates. If the index rises, your interest payments increase; if it falls, they decrease. Most SBA 7(a) loans are variable, with rates adjusting periodically (e.g., quarterly).
A $300,000 fixed-rate loan at 9% will always have the same interest portion of its monthly payment. A $300,000 variable-rate loan at Prime + 2.5% will see its interest portion change each time the Prime Rate adjusts.
Insider move
Lenders need to clearly disclose whether a rate is fixed or variable, how often it adjusts, and what index it's tied to. For variable rates, they must ensure proper tracking and communication of rate changes.
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
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 what the rate is
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