
A credit score is a tool lenders use to estimate how likely you are to repay borrowed money. The systems vary greatly between different countries, with some not using credit scores at all.
Evaluating creditworthiness is a big business, with credit reporting companies like Experian and Equifax making billions out of it.

Credit is a trust system. Depending on where you live, your credit history can affect much more than a mortgage application. A strong track record may help you:
• Borrow money more easily and at lower interest rates • Get approved for loans, credit cards, or mobile phone contracts • Pass rental or other financial checks
If you're moving to another country, learn the local system. Credit histories often don't cross borders, so you may have to build a financial reputation from scratch. Using a credit card responsibly can help establish a track record. In some countries, lenders care more about your income, existing debts, and missed payments.

Building credit history early can make life easier later. Waiting until you need a mortgage or car loan is often too late.
Young adults often face a catch-22: lenders want proof you can borrow responsibly before they'll lend to you. Credit systems also favor stable lifestyles, meaning frequent moves, job changes, or time spent abroad may make it harder to build a track record.
Credit bureaus and scoring companies such as FICO and Experian have faced criticism over data breaches, inaccurate records, and slow dispute processes. They can wield significant influence over consumers' financial lives.