The 7(a) loan program is SBA's primary business loan program for providing financial assistance to small businesses. Interest, Lenders and borrowers negotiate the interest rate and there is no SBA maximum interest rate limit.Need funding for your small business? Learn about SBA loans. No guarantee will be provided for a period longer than seven years. The guarantee will only cover loan principal; it will not cover any unpaid interest or fees. SBA loans are vital for small businesses. Interest income is a gross taxable income class under Pennsylvania law. Applying for a small business loan in Pennsylvania requires meeting specific criteria.