A-Credit is the highest credit grade existing as allotted to a borrower by a lender. Lenders use a credit grading system to make the borrowers eligible. The more the borrower's credit grade, the lower the interest rate presented to that borrower on a loan.
Credit grading by lenders is based on various factors, involving a borrower's debt-to-income ratio, FICO score, loan-to-value ratio and past delinquencies. This grade of credit can be related with a plus or minus for more depth. In this situation, a grade of "A+" would signify a higher credit worthiness than a score of "A-".