For SBA lenders
Short answer
No, a lender cannot unilaterally change the base rate option for a variable rate 7(a) loan after closing; the base rate agreed upon at authorization must remain consistent throughout the life of the loan.
The SBA 7(a) loan authorization specifies the base rate (Prime, SOFR, or Fixed) used to determine the interest rate. This is a fundamental term of the loan, and changes require a modification to the authorization. Unilateral changes by the lender are not permitted and would constitute a serious servicing violation, potentially jeopardizing the guaranty.
A $1,000,000 7(a) loan is authorized with an interest rate tied to the Prime rate. Two years into the loan, the lender decides it prefers to use SOFR. The lender cannot simply change the base rate. Any such change would require a formal loan modification, mutual agreement with the borrower, and likely SBA approval.
13 CFR Part 120 — Business Loans
Office of the Federal Register · Federal regulation
7(a) Alternative Base Rate Options
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.
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