In general, you’ll need to have a credit score in the mid- to high 600s, a debt-to-income ratio of less than 43 percent and a source of steady income to refinance a student loan, but the requirements vary by lender. Getting pre-qualified is an excellent way to see if you’re eligible for student loan refinancing. While prequalification doesn’t guarantee that you’ll be approved, it can help you see if you meet the minimum criteria set by lenders.