If I have it totally wrong, don't just downvote, please explain why. I really don't know if the IRS fine will be $500, that's just a number I heard thrown around last year. A $500 fine is less than half the cost a cheap insurance plan for one person, and much cheaper if you have a family. If you're living paycheck to paycheck, a possible $500 fine (that's not even a reality yet) is much less pain than buying insurance right now. My percentage estimates are off the top of my head (not scientific) but I heard 1/3 Americans don't file tax returns so that figured into my estimates. And remember we're talking about uninsured people, I'm thinking a large percentage of them are just getting by.