The 2016 Long-Term Budget Outlook

Source: Congressional Budget Office, pub. no. 51580, July 2016

From the abstract:
CBO’s long-run budget projections show a substantial imbalance in the federal budget beyond the next 10 years, with revenues falling short of spending by steadily increasing amounts. As a result, federal debt as a share of GDP would reach unprecedented levels if current laws generally remain unchanged. Such high and rising debt would have serious consequences for the nation’s budget and economy.