As a result of federal tax reform, NIPSCO natural gas and electric customers will benefit from a reduction in their monthly statements beginning with their May 2018 billing period. The Tax Cuts and Jobs Act, which decreased the corporate tax rate from 35 percent to 21 percent, was signed into law in December and became effective on Jan. 1st. For an average NIPSCO electric residential customer, the change will reduce bills by approximately $30 per year.  NIPSCO natural gas residential customers will see an approximate $10 per year reduction. Commercial and industrial customers will also experience reductions in their bills beginning at the same time.