The IRS has updated its FAQs regarding the Affordable Care Act's employer mandate, indicating that it will begin sending penalty letters to applicable large employers for the 2015 calendar year by late 2017. Employers failing to provide affordable health coverage may receive penalties based on two criteria: 'no coverage' and 'unaffordability.' Companies should prepare to respond to these letters, including gathering necessary documentation, as there are strict deadlines for contesting penalty assessments.