What it costs
Higher interest on everything, larger deposits, denied applications, and sometimes trouble renting. The monthly difference between poor and good credit on a car loan alone can be a full car payment's worth of interest.
What put it there
Usually some mix of missed payments, maxed revolving accounts, collections, and a thin file. Sometimes it is none of those and the report is simply wrong — mixed files and identity errors are more common than people think.
The way out
Pull all three reports, dispute what is inaccurate, get current on everything you can, drop utilization, and stop new applications for a while. Progress usually shows within a few reporting cycles.
