The United States is on track for a fourth straight year with a $1 trillion-plus budget deficit as a sluggish economy holds down corporate tax revenues, congressional forecasters said on Tuesday, but they warned that extension of payroll tax cuts would swell the gap even more, Reuters reported.

The non-partisan Congressional Budget Office said the fiscal 2012 deficit would rise to $1.079 trillion from its previous estimate of $973 billion made last August. The U.S. posted $1.3 trillion deficits in each of the past two years after a record $1.4 trillion deficit in fiscal 2009.