Deductible
Deductibles are typically used to deter the large number of claims that a consumer can be reasonably expected to bear the cost of. By restricting its coverage to events that are significant enough to incur large costs, the insurance firm expects to pay out slightly smaller amounts much less frequently, incurring much higher savings. As a result, insurance premiums are typically cheaper when they involve higher deductibles. For example, health insurance companies offer plans with high premiums and low deductibles, or plans with low premiums and high deductibles. One plan may have a premium of $1,087 a month with a $6,000 deductible, while a competitive plan may have a premium of $877 a month with a $12,700 deductible. The consumer with the $6,000 deductible will have to pay $6,000 in health care costs before the insurance plan pays anything. The consumer with the $12,700 deductible will have to pay $12,700.
Captive insurance
Captives may be licensed to write some lines of business directly. In other cases, such as workers' compensation in the U.S., for example, the business must initially be written by another insurer, under its insurance licence, which then reinsures it (lays it off) to the captive. The original insurer retains a fee, usually somewhere between 5% and 15%, to provide this service. 
Premiums paid to captives are tax deductible, provided the terms of the policy (including the premium amount) are reasonable. A captive cannot arbitrarily set the premium amount simply to generate a deduction for the parent. In most situations, the captive carrier should be able to demonstrate its premium generating process (underwriting).