For SBA lenders
Short answer
No, generally a lender cannot unilaterally change the base rate option for a variable rate 7(a) loan after closing. The base rate is fixed at authorization and can only be changed with prior SBA approval and borrower consent, under specific, limited circumstances.
The chosen base rate (e.g., Prime, SOFR, or Peg Rate) is a fundamental term of the loan authorized by the SBA. Changing it post-closing without SBA approval would constitute a material alteration of the loan terms, which is strictly prohibited. Such an action could lead to a guaranty repair or denial. Any change would also require borrower agreement, as it impacts the cost of their loan.
A lender used the Prime Rate as the base rate for a variable 7(a) loan. Two years into the loan, the lender decides to switch it to the SBA Peg Rate without borrower consent or SBA approval. This would be a material violation, potentially jeopardizing the guaranty.
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.
More on base 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