Lenders earn more money when borrowers do not pay off loans early primarily through interest charges. The longer a loan is held, the more interest the lender collects, which is calculated as a percentage of the loan amount over time. Some lenders impose prepayment penalties to recover potential losses from early loan repayment. Additionally, lenders often borrow funds at lower rates to lend to consumers, allowing them to profit from the interest rate difference. Ultimately, the longer the loan remains unpaid, the greater the lender's earnings from interest.