What factor plays a significant role in determining a person's credit score?

The payment history on debts is crucial in determining a person's credit score because it reflects how reliably an individual has repaid their previous debts. Credit scoring models weigh this factor heavily—typically accounting for 35% of a person's score—because it provides a clear indication of the individual's creditworthiness and likelihood to meet future payment obligations. Consistent, on-time payments showcase responsible financial behavior and build trust with lenders, while missed or late payments can significantly harm one's credit score.

In contrast, factors such as the amount of money in a bank account, the number of loans one has, and total income are not directly used in calculating credit scores. While having a higher income or savings can enhance one's financial health and potentially provide more opportunities for borrowing, these elements do not influence the score on their own. Instead, payment history reflects actual behavior regarding managing debt and payments, making it a primary factor in credit assessments.