Excess coverage for employers who use self insurance for routine workers compensation risks. Many employers consider workers compensation exposure to be routine and predictable and set up a fund to pay these losses themselves rather than trade premium and claims dollars with an insurance company. To supplement a self-insurance program, an employer may buy insurance for catastrophic loss above a certain limit. A stop loss aggregate contract will pay all losses in one year over a specified dollar limit. A specific excess contract pays losses over a stated limit per accident.