So says the IRS In a final regulation issued Wednesday, the Internal Revenue Service (IRS) assumed that under Obamacare the cheapest health insurance plan available in 2016 for a family will cost $20,000 for the year. Under Obamacare, Americans will be required to buy health insurance or pay a penalty to the IRS. The IRS’s assumption that the cheapest plan for family will cost $20,000 per year is found in