Most personal loan rates eligibility checkers use a soft credit search, which should not affect your credit score and is usually visible only to you. They estimate your likelihood of acceptance and possible rate using details such as your income, existing debts, loan amount and term, but the final decision and rate can change after a full application. Check whether the provider will carry out a hard search before applying. Compare the APR and total amount repayable, and use an FCA-authorised provider where possible.