Outstanding debt refers to an unpaid financial obligation that the borrower owes to the lender. This outstanding debt may include unpaid credit card bills, overdue loan payments, and other outstanding financial liabilities. Many synonyms can be used to describe this type of debt, including unpaid debt, outstanding liability, overdue debt, delinquent obligation, outstanding balance, and arrears. If left unpaid, outstanding debt can result in penalties, higher interest rates, and damage to one's credit score. To avoid accruing outstanding debt, it is important to keep track of debts, pay on time, and budget accordingly.