For SBA lenders
Short answer
No, a lender cannot unilaterally increase the interest rate on a variable rate 7(a) loan beyond the margin agreed upon at closing and tied to the specified base rate.
Variable rates on 7(a) loans are tied to a publicly available base rate (e.g., WSJ Prime, Term SOFR) plus an agreed-upon fixed margin. The lender can only adjust the interest rate when the chosen base rate changes. They cannot arbitrarily increase the margin or impose a higher rate independent of base rate fluctuations.
A 7(a) loan is approved with an interest rate of WSJ Prime + 2.75%. If Prime increases from 5% to 5.25%, the loan rate automatically adjusts to 8% (5.25% + 2.75%). The lender cannot decide to change the margin to 3.00% without a new agreement and potentially SBA approval.
13 CFR Part 120 — Business Loans
Office of the Federal Register · Federal regulation
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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