Employee Benefits include any additional services or assistance an employer offers beyond salary or wages. Common Employee Benefits include paid vacation time; sick leave; personal leave; 401(k) plans; other retirement plans; health and dental insurance; and disability, life, or supplemental insurance. Some Employee Benefits are optional, but employers are required by law to supply others. Some of these laws are federal, while others vary from state to state, so it is necessary for employers to know the laws specific to their state to be certain that they are meeting all requirements.