If you don’t pay a medical bill or a cell phone bill, your account may be referred to a collection agency. Once it is with an agency, they can register that debt with the credit bureau, which can have a big negative impact on your score. Most negative information will stay on your credit bureau for 7 years. Positive information will stay on your credit bureau forever, so long as you keep the account open. If you close an account with positive information, then it will typically stay on your report for about 10 years, until that account completely disappears from your credit bureau and score. If you don’t use your credit card (and therefore no payment is due), your score will not improve. You have to use credit in order to get a good score.
When you know the kinds of activities in your credit that can affect your scores, you can work to take better care of your credit, too. Things like late payments, liens or bankruptcies all have varying levels of impact in your credit scores since they're reflected on your credit report, too. Getting familiar with your credit report can help you see the impact these kind of events can have in your credit.
The Fair Credit Reporting Act (FCRA) requires each of the nationwide credit reporting companies — Equifax, Experian, and TransUnion — to provide you with a free copy of your credit report, at your request, once every 12 months. The FCRA promotes the accuracy and privacy of information in the files of the nation’s credit reporting companies. The Federal Trade Commission (FTC), the nation’s consumer protection agency, enforces the FCRA with respect to credit reporting companies.