Credit.com and FreeScore.com offer charts that define the various classifications within the credit score spectrum and outline the implications of having a score within each part of the range, note Credit.com and FreeScore.com. Anything below 600 is considered poor, while excellent scores are above 720.
It's worth noting that different lenders have different criteria, so having a 580 when applying for a credit card could produce a different outcome than when applying for a mortgage. The FICO credit score spectrum runs from 301 to 850, but it isn't proportional, which means that being in the middle between 550 and 600 is not good. "Good" credit begins at 660 according to Credit.com and 680 according to FreeScore.com.