Entergy Mississippi Inc. filed a preliminary plan to pass along savings due to the recent federal corporate tax cut to ratepayers, according to a Feb. 26 news release.

Subject to Mississippi Public Service Commission approval, residential customers would see a monthly decrease of over $30 during July, August and September, due to lower-rates and short-term bill credits.

"The tax reduction will allow us to reduce rates, provide substantial bill credits and lower our customers' bills during the high-usage summer months," Entergy Mississippi President and CEO Haley Fisackerly said.

Without the cut in the corporate tax rate to 21% from 35%, Entergy Mississippi said its plans to upgrade the grid would have "required significant rate increases."

The Entergy Corp. subsidiary plans to file a formal plan as part of its annual rate filing with the commission in mid-March.