When you initially check your rates with Payoff, your credit score won't be impacted. After you finalize your loan, the company will run a hard credit inquiry, which allows it to get a comprehensive view of your credit history but may ding your score.  Once you have your loan and begin making payments, Payoff will report those payments (or lack thereof) to credit reporting agencies. If you make reliable, on-time payments, you may improve your credit score. If you're consistently late or miss your payments, your credit score may be damaged.