Credit scoring is not limited to banks. Other organizations, such as mobile phone companies, insurance companies, landlords, and government departments employ the same techniques. Digital finance companies such as online lenders also use alternative data sources to calculate the creditworthiness of borrowers. Credit scoring also has much overlap with data mining, which uses many similar techniques. These techniques combine thousands of factors but are similar or identical.
When you are doing a credit check yourself pulling your annual free credit report you are performing a soft credit inquiry. This type of action does not impact your credit at all. On the other hand if you are applying for a loan, a credit card, or a mortgage, that will be counted as a hard credit inquiry and will slightly decrease your credit score.
Nothing in the scoring models suggest that carrying credit card debt month to month is beneficial. It is totally possible to establish a good credit score by paying off your credit card on time and in full every month. Don’t plan to pay interest — in other words, don’t pay just the minimum payment — to build your credit score. It won’t help with your score, and it will cost you a staggering interest payment.