Paying overdue taxes in installments is about to become more expensive. The Service is proposing a stiff fee hike to go into effect on Jan. 1, 2017. The charge for new installment plans will be $225, a $105 jump from today's cost. The outlay for direct debit installment agreements will more than double to $107. And for restructuring or reinstating an existing plan, the fee will rise $39 to $89.