Minimum credit score on a $20K loan with bad credit depends on the lender and your income as well as other eligibility criteria. Some lenders offer $20000 personal loans to borrowers with bad credit and others don’t. Most lenders will want you to have a credit score of 640 or higher. However, just because a lender is willing to work with you and your credit score doesn’t mean they will give you the best interest rates and terms.