TOPEKA, Kan. (AP) - Kansas regulators have ordered Kansas Gas Service to return more than $17.9 million in tax savings to its customers.

The Kansas Corporation Commission said in a news release Monday that its order will mean a one-time bill credit of $22.78 for residential customers.

The agency says the savings are the result of a federal law that reduced the corporate tax rate from 35 percent to 21 percent in January of last year. The Commission had required utilities to track and keep separate savings from the tax cut pending its review.

Kansas Gas Service had asked to keep the savings to offset its service costs, but the Commission determined that was not in the public interest.