Life insurance is legally binding contract between an insurance company and an individual insurance policy holder, in which the insurer promises to pay an insured person with a set amount of money upon the premature death of the insured individual. According to the contract, payment can also be made for certain other situations, such as critical illness or terminal disease. The insured can choose to pay monthly premiums or purchase insurance by other means like borrowing against the policy or paying in an amount in one lump amount. Typically, the younger the the insured party is more expensive the amount of premium must pay. This is because the insurance company assumes that the insured party will live longer than the average.