Accumulated interest payments from 2014 through 2018 are $1.76 trillion under CBO’s new baseline. Interest payments for the second five years are more than double that or about $3.64 trillion.

The growth takes place in a period when CBO is forecasting a steady ratcheting down on annual appropriations in hopes of reducing future deficits. On top of cuts enacted in 2011, the new baseline assumes that a new round of across-the-board cuts scheduled for March 1 will go into effect.