Sounds confusing, doesn't it?The credit score is actually calculated using a "scorecard" where you receive points for certain things. Creditors and lenders who view your credit report do not get to see the scorecard, so they do not know exactly how your score was calculated. They just see the final scores.

Basic guidelines on how to view the FICO scores vary a little from lender to lender. Usually, a score above 680 will require a very basic review of the entire loan package. Scores between 640 and 680 require more thorough underwriting. Once a score gets below 640, an underwriter will look at a loan application with a more cautious approach. Many lenders will not even consider a loan with a FICO score below 600, some as high as 620.FICO Scores and Interest Rates

Credit scores can affect more than whether your loan gets approved or not. They can also affect how much you pay for your loan, too. Some lenders establish a "base price" and will reduce the points on a loan if the credit score is above a certain level. For example, one major national lender reduces the cost of a loan by a quarter point if the FICO score is greater than 725. If it is between 700 and 724, they will reduce the cost by one-eighth of a point. A point is equal to one percent of the loan amount.

There are other lenders who do it in reverse. They establish their base price, but instead of reducing the cost for good FICO scores, they "add on" costs for lower FICO scores. The results from either method would work out to be approximately the same interest rate. It is just that the second way "looks" better when you are quoting interest rates on a rate sheet or in an advertisement.