“As it typically does after the President’s budget is released, CBO has updated the baseline budget projections it published earlier in the year. CBO now estimates that if the laws that currently govern federal taxes and spending generally remain in place, the federal budget deficit will total $486 billion in fiscal year 2015, about the same as the shortfall posted in 2014. However, because the nation’s output (its gross domestic product, or GDP) has increased, the deficit projected for 2015 represents a slightly lower percentage of GDP—2.7 percent—compared with 2.8 percent last year. In 2009, the deficit peaked at 9.8 percent of GDP; as recently as 2011 it was equal to 8.5 percent of GDP…Under the assumption that current laws will generally remain unchanged, the budget deficit is projected to decline in 2016, to $455 billion, or 2.4 percent of GDP, and then to hold roughly steady relative to the size of the economy through 2018. Beyond that time, however, the gap between spending and revenues is projected to grow faster than GDP: The deficit in 2025 is projected to reach $1.0 trillion, or 3.8 percent of GDP, and cumulative deficits over the 2016–2025 period are projected to total $7.2 trillion. CBO’s estimate of the deficit for 2015 is $18 billion greater than the shortfall it projected in January, mostly because the agency has increased estimated outlays for student loans, Medicare, and Medicaid. In contrast, the projected deficits for the 2016–2025 period total $431 billion less than the cumulative deficit that CBO projected in January. The largest factor underlying that reduction is a downward revision to projected growth in private health insurance spending, which is estimated to lower the net cost of the provisions of the Affordable Care Act (ACA) that are related to insurance coverage and to increase overall revenues from income and payroll taxes (because a larger share of employees’ compensation over the coming decade is now projected to be paid in the form of taxable wages and salaries).”