A report issued by the U.S. Department of Health and Human Services’ Office of the Assistant Secretary for Planning and Evaluation (ASPE) shows that in about 94 percent of cases the Congressional Budget Office overestimated how high premiums would be. Those estimates were initially made at the time Obamacare was being debated.
Specific premiums are going to vary quite widely from state to state and according to your age and the size of your family. But nationwide health care spending has grown more slowly than people had expected over the past couple of years, and in most states insurance companies have offered fairly aggressive bids to participate in the exchanges. Obviously this could all change 18 months from now when people are actually in the plans, but for now it looks like Obamacare will be cheaper for families and taxpayers than was thought at the time Congress voted on it.