Assumption of Loan Requirement Letter for disaster loan servicing action request packages. About this document and download.Can An SBA 504 Loan Be Assumed? Many types of loans are not assumable. Mortgage assumption allows a buyer to take on the original loan balance at the original terms, but it doesn't account for any home equity the seller has built. 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. Our office provides help with SBA services including funding programs, counseling, federal contracting certifications, and disaster recovery. Some lenders require the new buyer to qualify for the loan before a loan assumption can be made. Use the CD calculator to see the total interest you can get on a certificate of deposit.