There are four basic types of credit. By understanding how each works, you will be able to get the most for your money and avoid paying unnecessary charges.

Service credit is monthly payments for utilities such as telephone, gas, electricity, and water. You often have to pay a deposit, and you may pay a late charge if your payment is not on time.

Loans let you borrow cash. Loans can be for small or large amounts and for a few days or several years. Money can be repaid in one lump sum or in several regular payments until the amount you borrowed and the finance charges are paid in full. Loans can be secured or unsecured.

Installment credit may be described as buying on time, financing through the store or the easy payment plan. The borrower takes the goods home in exchange for a promise to pay later. Cars, major appliances, and furniture are often purchased this way. You usually sign a contract, make a down payment, and agree to pay the balance with a specified number of equal payments called installments. The finance charges are included in the payments. The item you purchase may be used as security for the loan.

Credit cards are issued by individual retail stores, banks, or businesses. Using a credit card can be the equivalent of an interest-free loan--if you pay for the use of it in full at the end of each month.