January 11, 2018 – tucson.com —  Customers of Tucson Electric Power Co. and other state-regulated utilities may be in line for a break on their bills, thanks to the federal tax overhaul.

But exactly how, and how much, are up in the air as companies and regulators grapple with the effects of the far-reaching legislation.

Prompted by regulators, TEP and other utilities are filing or preparing proposals to return to ratepayers potentially millions of dollars the companies will save because of a cut in the U.S. corporate tax rate to 21 percent, from 34 percent.

TEP plans to file proposals to pass through its tax savings, though details are not yet available, in response to a request by a Corporation Commission member.

Arizona Public Service Co., the largest state-regulated utility, already has filed a proposal to pass through the tax benefit by reducing the energy charges customers pay per kilowatt-hour of power, a move that would save the average APS home customer using 1,100 kWh per month about $4.70 monthly.

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