If have not used credit in the past, loans can actually help your credit. Paying them off responsibly shows that you are a good customer and that you keep your promises. Also, different types of loans affect credit differently. Ideally you should have a mixture of loan types (mortgage, auto, credit card, etc) as opposed to having huge credit card debt as your only loan type.
To learn more about how a healthy mix of loans affects credit, see How to Build Credit.
Return to the main page on factors that affect credit.