Under the ACA – which could soon be repealed – anyone without health insurance for more than three months of the year has to pay a penalty at tax time (unless you qualify for an exemption). So if you didn’t have health insurance in 2016, you owe the IRS $695 per adult in your family, or 2.5 percent of your income, whichever is higher. That’s a big step up from last year’s penalty of $325 per person, or 2 percent of income. The penalty for kids is half that for adults, or $347.50 per kid.
President Trump's first executive order calls the individual mandate into question, but it is not yet clear whether that will affect the 2016 tax year.