March 30, 2017 17:42 Updated Follow The ACA defines insurance as "affordable" when the employee's contribution for single coverage is not more than 9.5% of the employee's salary. Related articles What are the basic requirements for providing health insurance to my employees? How do I file a complaint against a qualified health care provider? What if choose not to have insurance? Where can I get a list of HMOs and PPOs? How do I receive INShape updates?