Another option to sell a business with an SBA loan is for the buyer to assume the loan. SBA loans are fully assumable with SBA approval.Assumption of Loan Requirement Letter for disaster loan servicing action request packages. About this document and download. The basic steps involved in assuming a loan are: The buyer and seller must agree to the terms of the assumption. What Is Required to Assume an SBA 504 Loan? An assumable mortgage involves one borrower taking over, or assuming, another borrower's existing home loan. Find out how it works. Report the status of your loan(s) or other debt owed to SBA to credit bureaus. • Hire a collection agency to collect your loan or other delinquent debt.