In India, there are four major credit bureaus that determine the credit score for each individual borrower: TransUnion CIBIL, Experian, CRIF Highmark and Equifax. All these credit bureaus are regulated by the Reserve Bank of India under the section of Credit Information Company Regulation Act (CICRA), of 2005.
According to this act, when you avail of a loan or any other credit facility from any financial institute (such as PSU Banks, Private lenders, NBFCs and other financial institutes), they report the particular loan account to all four credit bureaus.
Not only the loan account, when you start to serve the loan interest, they also share its repayment records with credit bureaus on a regular basis. Now, based on your loan repayment history, and current credit activity, each credit bureau evaluates a unique credit score for you.
On a large scale, Credit Bureaus collect and maintain these credit information for millions of borrowers and help lending institutes to make their lending decisions.
That means, when you again apply for a new credit facility, the bank manager retrieves your credit score from any of these credit bureaus for the purpose of credit risk assessment.
Ultimately, the credit score helps them to decide, whether they approve the loan application or not; If yes, then what interest they will offer, what will be the loan term and so on.