FICO Score and How do I Make it Work for Me is our topic on The Core Business Show with Tim Jacquet. FICO Score and How do I Make it Work for Me - whether or not you receive a loan and what interest rate you get on your credit card may be determined by something called a FICO score. Named for Fair, Isaac & Co., a California-based company that developed the credit score, the FICO score is the most widely used scoring method to determine credit worthiness.