Self-insurance means the business will pre-determine and pay a portion or all of the expenses of employees in ways similar to traditional health care providers. The funding comes from a trust or reserve account.
A portion of the cost may be paid through premiums, as is common in health care plans. A kind of coinsurance purchased by the company is called catastrophic coverage given through a “stop loss” policy. The company can manage this directly or it can be done through a contractor.