According to their guidelines, USDA will go down to a 580 credit score, but most lenders will want a 640 credit score. USDA uses an online system to underwrite the risk of the loan, and scores under 640 are very difficult to get approved. Validating the Credit Score. Two or more eligible tradelines are necessary to validate an applicant’s credit report score. Eligible tradelines consist of credit accounts (revolving, installment etc.) with at least 12 months of repayment history reported on the credit report. At least one applicant whose income or assets are used for qualification must have a valid credit report score The Rural Housing Service (RHS) operates under the federal Department of Agriculture to guarantee loans for rural home-buyers with limited income who can’t obtain conventional financing. The upside is that Kentucky USDA loans require no down payment. The downside is that they charge a steep up-front fee of 1% of the loan amount (which can be paid off over the entire loan term) and an annual fee of 0.35%.