The last place I worked before moving away from the states had different rates for different folks. It was not a percentage of income, but rather a flat fee. S

The last place I worked before moving away from the states had different rates for different folks. It was not a percentage of income, but rather a flat fee. So if you did your physical, you got a discount. Non-smoker? Charge less. (They'd only pay for smoking cessation program once, though). Not meeting company wide health numbers (blood sugar, cholesterol, etc)? You get charged more unless you have a doctors note saying it was medically impossible for you to meet the numbers.