Avangrid stated it will pass to its electricity and gas customers the full benefit of savings it will realize from the federal Tax Cuts and Jobs Act, with the Orange-based company’s service area covering portions of the New Haven and Bridgeport areas.

Avangrid issued a statement Wednesday night confirming the policy as “a matter of fairness” in its words, more than a week after the Connecticut Public Utilities Regulatory Authority stated it would review Avangrid’s rates and those of other Connecticut electricity and gas utilities, with federal taxes a factor in the rates approved by PURA.

Avangrid subsidiaries include United Illuminating, Southern Connecticut Gas and Connecticut Natural Gas, as well as Central Maine Power and Maine Natural Gas; Berkshire Gas in Massachusetts; and New York State Electric & Gas and Rochester Gas & Electric.

Under the new tax law, U.S. companies will pay a 21 percent rate on their corporate income taxes, down from 35 percent previously. In December, PURA approved electricity rates for United Illuminating amounting to $375 million in 2018. The new federal tax rate would reduce that total by between $10 million and $11 million, according to Rich Sobolewski, supervisor of utility financial analysis for the office of Connecticut Consumer Counsel Elin Swanson, wiping out nearly the entirety of an $11.5 million distribution increase PURA had approved for this year.

Sobolewski calculated at between $6 million and $7 million this year’s tax benefit for customers of Southern Connecticut Gas.