FLASHBACK: The Accuracy of the CBO’s Obamacare Forecasts. “The office’s track record is, well, not very good. CBO vastly overestimated the number of Americans who would enroll on the exchanges and pay the individual mandate penalty. Each year, CBO revised their estimates lower and lower, and still never quite predicted how weak the enrollment would be. This post is not meant as a critique of CBO’s methodology, but rather a frank recognition that even the best experts cannot predict, with any accuracy, the impact of such a massive government program. Indeed, in June 2014, CBO threw in the towel on scoring Obamacare’s complete impacts.”