Several retailers offer 0% financing on appliances if the item is fully paid off in a specified span of time, commonly 18 or 24 months. If a customer is unable to completely pay for the appliance in that amount of time, they can expect to pay interest rates ranging from 8% to nearly 30%, with an average rate of approximately 22%. And, in general, if you're looking to buy appliances on finance with bad credit, you can expect to pay a higher interest rate than individuals with immaculate credit records.